Hewlett-Packard 432A Power Meter, 478A Thermistor Mount Technical Manual

TM 9-6625-2469-15

D E P A R T M E N T O F T H E A R M Y T E C H N I C A L M A N U A L

OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT,

GENERAL SUPPORT AND DEPOT MAINTENANCE

MANUAL [INCLUDING REPAIR PARTS]

POWER METER

[HEWLETT-PACKARD MODEL 432A]

[ 4 9 3 1 - 4 3 6 - 4 8 8 3 ]

THERMISTOR MOUNT

[HEWLETT-PACKARD MODEL 478A]

[ 6 6 2 5 - 8 6 6 - 1 9 5 5 ]

H E A D Q U A R T E R S , D E P A R T M E N T O F T H E A R M Y

DECEMBER 1969

WE 20780

WARNING

HIGH VOLTAGE

is used in the operation of this equipment.

DEATH ON CONTACT

may result if personnel fail to observe safety precautions.

Learn the areas containing high voltage in each piece of equipment.

Be careful not to contact high-voltage or 115-volt ac input connections when installing or operating this equipment.

Before working inside the equipment, turn power off and ground points of high potential before touching them.

POWER METER

4 3 2 A

SERIAL PREFIX: 914-

This manual applies directly to HP Model

432A Power Meters having serial prefix number 914.

SERIAL PREFIXES NOT LISTED

For serial prefixes above 914, a “Manual

Changes” sheet is included with this manual.

For HP Model 432A with serial prefix below 914 refer to Appendix A.

Copyright

H E W L E T T - P A C K A R D C O M P A N Y

1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA,

1968

U . S . A

(This manual contains copyright material.)

TM 9-6625-2469-15

TECHNICAL MANUAL )

No. 9-6625-2469-15)

)

HEADQUARTERS

DEPARTMENT OF THE ARMY

Washington, D.C.

2 2 D e c e m b e r 1 9 6 9

(4931-436-4883)

THERMISTOR Mount (HEWLETT-PACKARD MODEL 478A)

(6625-866-1955) ii

Table of Contents

List of Tables

POWER

METER

432A

Model 432A

II

III

IV

V

TABLE OF CONTENTS

I

Section

Page

GENERAL INFORMATION . . . . . . . . . . . . . . 1-1

1-1.

Description . . . . . . . . . . . . . . . . . . . .1-1

1-5.

Instrument Identification . . . . . . . . . 1-1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . .2-1

2-1.

Initial Inspection . . . . . . . . . . . . . .2-1

2-2.

2-4.

2-6.

Mechanical Check . . . . . . . . . . . . 2-1

Performance Checks . . . . . . . . . . 2-1

Damage Claims . . . . . . . . . . . .2-1

2-9.

Three-Conductor Power Cable . . . . 2-1

2-12. Primary Power Requirements . . . . 2-1

2-14.

Internal Battery Operation . . . . . . . 2-1

2-16.

2-17.

Battery Installation. . . . . . . . . . . 2-1

Battery Storage . . . . . . . . . . . . . . 2-1

2-19.

Rack Mounting . . . . . . . . . . . . . . . .2-1

2-21.

2-23.

Combining Case . . . . . . . . . . . .2-1

Adapter Frames . . . . . . . . . . .2-2

2-25. Repacking for Shipment . . . . . . . . . . 2-2

OPERATING INFORMATION.. . . . . . . . . . . 3-1

3-1.

3-4.

Introduction . . . . . . . . . . . . . . . . . ...3-1

Controls, Connectors, and

3-12.

3-17.

Indicators . . . . . . . . . . . . . . . . . . ...3-1

Battery Operation . . . . . . . . . . . . . ..3-1

Microwave Power Measurement

3-23.

3-27.

3-28.

3-30.

Accuracy . . . . . . . . . . . . . . . . . . . ...3-2

Calibrator Factor and Effective

Efficiency . . . . . . . . . . . . . . . . . . ...3-2

Precision Power Measurement . . . 3-2

General . . . . . . . . . . . . . . . . . . . . . 3-2

Measurement Procedure . . . . . . 3-2

PRINCIPLES OF OPERATION . . . . . . . . . 4-1

4-1.

Simplified Description . . . . . . . . . . . . 4-1

4-5.

Functional Block Diagram . . . . . . . . 4-1

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . 5-1

5-1.

Introduction . . . . . . . . . . . . . . . . . . . . . 5-1

5-3.

Content . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-4.

5-6.

Performance Tests . . . . . . . . . . 5-1

Adjustments . . . . . . . . . . . . . . . . . 5-1

5-10.

5-12.

Test Equipment . . . . . . . . . . . . . . 5-1

Service Information . . . . . . . . . . 5-1

5-14. 432 A Performance Tests with 8477A Calibrator. . . . . . . . . 5-1

Section

V

Page

MAINTENANCE (Cont.)

5-15.

Initial Setup . . . . . . . . . . . . . . . . . 5-1

5-16.

5-17.

Meter Accuracy Test . . . . . . . . . 5-1

Calibration Factor Test . . . . . . 5-2

5-18.

5-19.

5-20.

5-21.

Meter Linearity Check . . . . . . . 5-2

Zero Carryover Test . . . . . . . . 5-2

Fine Zero Range Check . . . . . . 5-3

432 Calibration without

5-24.

8477A Calibrator . . . . . . . . . 5-3

Calibration Procedure 1 . . . . . . 5-3

5-26.

Calibration Procedure 2 . . . . . . 5 - 8

5-27.

Cover Removal and Replacement 5-8

5-29.

5-30.

Top Cover Removal . . . . . . . . . . 5-8

Top Cover Replacement . . . . . . 5-8

5-31.

5-32.

Bottom Cover Removal . . . . . . . 5-8

Bottom Cover Replacement . . . 5-8

5-33.

Adjustment Procedures . . . . . . . . . 5-8

5-34.

Initial Setup . . . . . . . . . . . . . . . . . 5-8

5-35.

5-36.

5-37.

Mechanical Meter Adjustment . 5-8

Bridge Amplifier Tests . . . . . . . 5-9

Meter and Recorder

Output Calibration . . . . . . . 5-9

5-38.

5-39.

Battery Charger Adjustment

(Option 01 Only) . . . . . . . . . . 5-9

Battery Removal . . . . . . . . . . . . 5-10

5-40. Isolating Trouble in Transistor

Circuits . . . . . . . . . . . . . . . . . . . . 5-10

5-46.

Out-of-Circuit Testing . . . . . . . 5-10

5-48. Component Replacement in

5-50.

5-52.

Etched Circuits . . . . . . . . . . . . . 5-13

Axial-Lead Components . . . . . . 5-13

Other Components . . . . . . . . . . . 5-13

VI

REPLACEABLE PARTS . . . . . . . . . . . . . ...6-1

6-1.

Introduction . . . . . . . . . . . . . . . . . ...6-1

6-3.

Ordering Information . . . . . . . . . . . . 6-1

VII TROUBLESHOOTING. SCHEMATICS.

AND COMPONENT tiCATIONS . . . . . . . . . 7-1

7-1.

Introduction . . . . . . . . . . . . . . . . . ...7-1

7-5.

Troubleshooting . . . . . . . . . . . . . . ...7-1

7-8.

Schematics . . . . . . . . . . . . . . . . . . ...7-1

7-12. AIAl Auto Zero Assembly . . . . . . . 7-1

7-14. Test Conditions . . . . . . . . . . . . . . ...7-1

LIST OF TABLES

Number

1-1.

1-2.

5-1.

5-2.

5-3.

5-4.

5-5.

5-6.

5-7.

6-1.

6-2.

6-3.

Title

Page

Specifications, . . . . . . . . . . . . . . . . . . . ...1-1

Thermistor Mounts forthe 432A . . . . . . 1-2

Recommended Test Equipment . . . . . . . . 5-0

Meter Accuracy Test . . . . . . . . . . . . . ...5-2

Calibration Factor Test..... . . . . . . . . . 5-2

Performance Test Card... . . . . . . . . . . . 5-5

Out-of-Circuit Transistor Resistance

Measurements . . . . . . . . . . . . . . . . . . ...5-11

Etched Circuit Soldering’Equipment . . . 5-13

Safe Ohmmeter Range for Transistor

Resistance Measurements . . . . . . . . . . 5-13

Reference Designation Index . . . . . . . . . 6-2

Replaceable Parts . . . . . . . . . . . . . . . . ...6-12

Code List of Manufacturers . . . . . . . . . . 6-15

Number Title Page

7-1.

Schematic Notes . . . . . . . . . . . . . . . . . ...7-2

7-2.

Overall Troubleshooting . . . . . . . . . . . . . 7-5

7-3.

RF Bridge Troubleshooting . . . . . . . . . . . 7-6

7-4.

Compensation Bridge Troubleshooting.. 7-6

7-5.

Auto-Zero Troubleshooting. . . . . . . . . . . 7-7

7-6.

Chopping andSumm ing Circuit

Troubleshooting . . . . . . . . . . . . . . . . . ...7-7

7-7.

5 kHz Multivibrator Troubleshooting . . 7-7

7-8.

Range Amplifier Troubleshooting . . . . . 7-7

7-9.

Calibration Factor Amplifier

Troubleshooting . . . . . . . . . . . . . . . ..,. ..7-7

7-10. Pulse Width Modulator and Meter

Troubleshooting . . . . . . . . . . . . . . . . ...7-7

7-11. Power Supply Troubleshooting . . . . . . . . 7-9

i i i

Model 432A

List of Illustrations

Number

1-1.

1-2.

2-1.

2-2.

3-1.

3-2.

3-3.

3-4.

4-1.

4-2.

4-3.

4-4.

4-5.

Page

HP Model 432A Power Meter . . . . . . . . . . . . 1-0

Instrument Identification . . . . . . . . . . . . . . . 1-1

Sub- module Installation in Rack

HP Model 1051A Combining Case

Front Panel Controls, Connectors

LIST OF ILLUSTRATIONS

Adapter Frame . . . . . . . . . . . . . . . . . ...2-2

Instrument Installation . . . . . . . . . . . ...2-2

Precision Power Measurements . . . . . . . . . . 3-3

and Indicators . . . . . . . . . . . . . . . . . . . . ...3-4

Rear Panel Controls and Connectors . . . . . . 3-6

Turn On and Zeroing Procedure . . . . . . ...3-8

Model 432A Simplified Block Diagram. . . . 4-0

Model 432A Block Diagram. . . . . . . . . . . . ...4-3

Mode1 432A RF Bridge Talking Schematic. . 4-4

Model 432A Meter Logic Talking

Schematic . . . . . . . . . . . . . . . . . . . . . . . . ...4-6

Model 432A Power Supply Talking

Schematic . . . . . . . . . . . . . . . . . . . . . . . . .4-8

Number

Page

7-1.

Servicing Block Diagram . . . . . . . . . . . . 7-3

7-2.

Model 432A Top Internal View . . . . . . . . . . . 7-4

7-3.

Mode1 432A Waveforms . . . . . . . . . . . . ...7-4

7-4.

Mode1 432A Test Point Locations . . . . . . . . 7-5

7-5.

Model 432A Bottom View,

Component Locations . . . . . . . . . . . . ...7-6

7-6.

Mode1 432A Front Panel Interior . . . . . . . 7-6

7-7.

Al Bridge Assembly,

Component Locations . . . . . . . . . . . . . . . 7-10

7-8.

Mode1 432A Rear Panel Interior . . . . . . . . . 7-10

7-9. RF and Compensation Bridge

Schematic Diagram . . . . . . . . . . . . ...7-11

7-10. Mode1 432A Switches . . . . . . . . . . . . . . ...7-12

7-11. A2 Meter Logic Assembly,

Component Locations . . . . . . . . . . . . . . 7-13

7-12. Meter Logic Schematic Diagram . . . . . . . . . 7-13

7-13. A2 Meter Logic Assembly, Power

Supply Component Locations . . . . . . . 7-15

7-14. A7 Battery Charging Circuit (Option 0l)

Component Locations . . . . . . . . . . . . 7-15

7-15. Power Supply, Schematic Diagram . . . . . .7-l5

7-16. Thermistor Cable Wiring Diagram . . . . . . . 7-16

5-1.

5-2.

5-3.

5-4.

Check and Adjustment Test Setup . . . . . . . . . 5-1

Zero Carryover Test Setup . . . . . . . . . . . . . . 5-3

Bridge Amplifier Test,... . . . . . . . . . . . ...5-10

Transistor Biasing and Operating

Chmacteristics . . . . . . . . . . . . . ...5-12

A1-1. A2 Meter Logic, Component Locations . .. A1-2

A1-2. A2 Meter Logic Assembly, Power

Supply, Component Locations . . . . . . .A1-2

A1-3. Meter Logic Schematic Diagram . . . . . . .. A1-3

APPENDIX A.

MANUAL CHANGES - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

B.

BASIC ISSUE ITEMS LIST

-----------------------------

C.

MAINTENANCE ALLOCATION CHART - - - - - - - - - - - - - - - - - -

D.

REPAIR PARTS LIST - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

A l - 1

B1-1

C1-1

D1-1

i v

GENERAL INFORMATION - - - - - - - - - - - - -

1.

I n t r o d u t i o n ------------------

4 .

I n c o m i n g I n s p e c t i o n --------

O P E R A T I O N - - - - - - - - - - - - - - - - - - - - -

7.

8 .

10.

11.

13.

14.

P r e c a u t i o n s - - - - - - - - - - - - -

Mechanical Shock - - - - - - - - -

B i a s i n g T h e r m i s t o r s - - - - -

Minimum Input --------------

Average Power -------- -----

Pulse Energy and Peale

Power 478A/432 - - - - - - - - -

15.

19.

21.

Pulse Energy and Peak

Power 478A/431 - - - - - - - -

D r i f t P r e c a u t i o n - - - - - - - -

Z e r o - S e t - ---------- -- - - -

23.

RF Power Turned Off For

Z e r o - S e t - - - - - - - - - - - - - - -

25.

26.

30.

31.

33.

35.

37.

39 .

4 3 .

4 5 .

Thermistor Mount Disconnected For Zero-

S e t - - - - - - - - - - - - - - - - - -

478A/431 - - - --- - ------ - --

4 7 8 A / 4 3 2 - - - - - - - - - - - - - - - -

M o u n t C a l i b r a t i o n D a t a - -

- C a l i b r a t i o n F a c t o r - - - - - -

E f f e c t i v e E f f i c i e n c y - - - -

C a l i b r a t i o n D a t a

A p p l i c a t i o n --- - --- - - - -

T h e r m o e l e c t r i c E f f e c t - - -

T h e r m o e l e c t r i c E f f e c t

E r r o r C o r r e c t i o n

478A/431 -------- ---------

T h e r m o e l e c t r i c E r r o r

478A/432 - - - - - - - - - - - - - - -

OPERATING PRINCIPLES - - - - - - - - - -

4 7 . C i r c u i t D e s c r i p t i o n - - - - -

52. 431-Power Meter

Detection . . . . . . . . . . . . .

54.

4 3 2 P o w e r D e t e c t i o n - - - - -

MAINTENANCE - - - - - - - - - - - - - - - - - - - -

5 6 . M e c h a n i c a l S h o c k - - - - - - - - -

58.

Check On Thermistor

Match - - - - - - - - - - - - - - - - - - - - -

60.

Repair - - - - - - - - - - - - - - - - - - - -

7 1 .

Thermistor Assembly Rep l a c e m e n t P r o c e d u r e - - -

75.

R e m o v a l P r o c e d u r e - - - - - - -

76.

I n s t a l l a t i o n P r o c e d u r e - -

8-6

8-5

8-5

8-5

8-6

8-6

8-6

8-6

8-6

8-7

8-8

8-9

8 - 9

8-4

8-4

8-4

8-5

8-5

8-5

8-5

8-5

Page

8-1

8-1

8-2

8-2

8-3

8-3

8-3

8-2

8-2

8-2

8-2

8-2

8-2

8-3

N u m b e r T i t l e

LIST OF TALBLES

1

2

S p e c i f i c a t i o n s - - - - - - - - - - - -

Methods of Switching Off

3

RF Output of Various HP

S i g n a l G e n e r a t o r s - - - - - - -

P a r t s F u r n i s h e d i n

Thermistor Assembly

Replacement Kit, HP

0 0 4 7 8 - 6 0 0 - - - - - - - - - - - - - - - - - -

List of ILLUSTRATIONS

Number

1

2

7

8

9

10

3

4

5

6

Maximum Power Meter Reading vs PRF for Pulses

S h o r t e r t h a n 2 5 0 u s - - - -

Maximum Power Meter Readings vs Duty Cycle for

Pulses Longer than

250 u s ----------------

3 Maximum Power Meter Reading vs Square and Sine

W a v e F r e q u e n c y - - - - - - - - - -

Source Impedance Shunting

One RF Thermistor

M o u n t - - - - - - - - - - - - - - - - - - -

Schematic Diagram of a

Model 478A Thermistor

Mount when Connected to a 431 Power Meter --------

Schematic Diagram of a

Model 478A Thermistor

Mount when Connected to a 4,82 Power Meter ----

---

Check on Model 478A

T h e r m i s t o r R e s i s t a n c e

Match - - - - - - - - - - - - - -

Thermistor Compensation ---

Model 478A Thermistor

M o u n t A s s e m b l y - - - - - - - - - -

HP Model 478A Printed

C i r c u i t A

S S y W i r i n g - - - - -

Page

8-2

8-4

8-8

Page

8-3

8-3

8-3

8-4

8-5

8-7

8-7

8-8

8-9

8 - 1 0

v

Section I

Model 432A

Figure 1-1. HP Model 432A POWER METER

v i

Model 432A

Section I

SECTION I

G E N E R A L I N F O R M A T I O N

1-1. DESCRIPTION.

1-2. The Hewlett-Packard Model 432A Power Meter, with HPtemperature -compensated thermistor mounts, measures RF power from 10 microwatt (-20 dBm) to 10 milliwatts (+10dBm) full scale with 1% of full scale accuracy from 10 MHz to 40 GHz. With a selector switch, the instrument normalizes the power meter reading to compensate for the Calibration Factor of a thermistor mount used for a given measurement.

For portable operation, Option 01 instruments have a

rechargeable nickel-cadmium battery. See Table 1-1

for complete specifications.

1-3. The Model 432A has provision for dc substitution measurements and for power meter calibration. An output is provided for recorders or digital voltmeter readout.

1-4. Accessories, Two accessories are supplied with the Model 432A Power Meter: a 7. 5-foot (2290 mm) detachable power cable and a 5-foot ( 1520 mm) cable that connects the thermistor mount to the meter. Ther mister mounts are available but not supplied with the

power meter (refer to Table 1-2). Table 1-1 lists

those accessories supplied and also those available.

1-5. INSTRUMENT IDENTIFICATION.

1-6. Hewlett-Packard instruments are identified by an 8-digit serial number. The first three digits are the Serial Prefix. To properly match a manual with the instrument to which it applies, the prefix on the instrument must be the same as the pref ix at the front of the manual. If the numbers are different, information is supplied either on yellow Manual Change

Supplements, or in an Appendix in the Manual. If the change information is missing, contact your HP Sales

Office (Sales Offices are listed at the b a c k of the

Manual).

Figure 1-2. Instrument Identification

Table 1-1. Specifications

Instrument Type: Automatic, self -balancing power meterforuse with temperature -compensated ther mister mount.

Power Range: 7 ranges with full-scale readings of

10, 30, 100, and 300 µW, 1, 3 and 10 mW; also calibrated in dBm from -20 dBm to +10 dBm full scale in 5-dB steps.

Accuracy:

±1% of full scale on all ranges (+O°C, to o

+55 C).

Calibration Factor Control: 13-position switch norrealizes meter reading to account for thermistor mount Calibration Factor.

Range: 100% to 88% in l% steps.

Thermistor Mount: External temperature -compen sated thermistor mounts required for operation

(see Table 1-2).

Meter: Taut -band suspension, individually computer-calibrated, mirror-backed scales. Mini watt scale more than 4-1 4 inches (108 mm) long.

Zero Carryover: Less than +0.5% of f u 11 scale when zeroed on most sensitive range.

Fine Zero: Automatic, operated by toggle switch.

Recorder Output: 1.000 volt into open circuit cor responds to full-scale meter deflection (1. O on

O,- 1 scale) +0.5%; 1000-ohm output impedance,

BNC connector.

RFI: Meets all conditions specified in MIL-I-6181D.

Power: 115 or 230 Vac ±10%, 50 to 400 Hz, 2-1/2 watts. Optional rechargeable battery provides up to 20 hours continuous operation. Automatic battery recharge.

Weight: Net 6-1/2lb(3kg), shipping 9-1/4lb(4,2kg).

Weight with Optional Battery Pack: Net 9-1/4 lb

(4,2 kg), shipping 12 lb (5,5 kg).

1-1

Section I

Table 1-1.

Model 432A

Table 1-2.

1-2

Model 432A

Section II

Installation

2-1. INITIAL INSPECTION.

2-2.

MECHANICAL CHECK.

2-3. If damage to the shipping carton is evident, ask that the carrier’s agent be present when the instrument is unpacked. Inspect the instrument for mechanical damage. Also check the cushioning material for signs of severe stress.

2-4. PERFORMANCE CHECKS.

2-5. The electrical performance of the Model 432A should be verified upon receipt. Performance checks

suitable for incoming inspection are given in Section V,

Maintenance.

2-6. DAMAGE CLAIMS.

2-7. If t h e instrument is mechanically damaged in transit, notify the carrier and the nearest Hewlett-

Packard field off ice immediately. A list of field offices is at the back of this manual. Retain the shipping carton and padding material for the carrier’s inspection.

The field off ice will arrange for replacement or repair of your instrument without waiting for claim settlements against the carrier,

2-8. Before shipment this instrument was inspected and found free of mechanical and electrical defects.

If there is any def iciency, or if electrical performance is not within specifications, notify your nearest Hewlett -Packard Sales and Service Off ice.

2-9. THREE-CONDUCTOR POWER CABLE.

2-10.

To protect operating personnel, t h e National

Electrical Manufacturers Association (NE MA) recommends that the instrument panel and cab in et be grounded. All Hewlett-Packard instruments are equipped with a three-conductor power cable which, when plugged into an appropriate receptacle, grounds the instrument.

The off set pin on the power cable three-prong connector is the ground wire.

2-11. To preserve the protection feature when operating the instrument from a two-connector outlet, use a three-prong to two-prong adapter and connect the green pigtail on the adapter to ground.

SECTION II

INSTALLATION

2-14. INTERNAL BATTERY OPERATION.

2-15.

Model 432A Option 01 instruments contain an internal battery and a battery charging assembly. By connecting the 432A to an ac source, the battery may be charged overnight. The battery can be maintained in the charging state indefinitely without damage. It will assume its full capacity, 1.25 ampere -hours, and will not charge in excess of that. This enables the instrument to operate for approximately 20 hours continuously without recharging.

2-16. BATTERY INSTALLATION.

a. Set power switch to off and remove power plug from rear panel, b. Remove top and bottom, and s i d e instrument covers.

c. The battery is installed with the terminals toward the right hand side of the instrument when faced from the front.

The two terminals on the battery fit into spaces provided on the circuit board.

d. Using the retaining nuts, fasten the battery firmly in place. Be careful not to short the battery terminals at any time as this may cause battery cell damage.

e. Install Assembly A7, battery charging board, in the space provided for it just ahead of the battery.

f. Reinstall instrument covers and adjust circuit.

Instrument is now ready for operation.

2-17. BATTERY STORAGE.

2-18. Store the battery at or below room temperature.

Extended storage at high temperature will reduce the cell charge, but will not damage the battery if t h e storage temperature is below 140” F. Install the battery in the instrument and recharge before using

Model 432A in battery operation.

2-12. PRIMARY POWER REQUIREMENTS.

2-13.

The Model 432A operates from 115 or 230 volts ac line voltage.

Line frequency may vary from 50 to

400 Hz. A slide switch on the rear panel is moved to the correct position for the I in e voltage available.

Before operating the equipment, ensure that the fuse installed in the instrument corresponds to the value marked on the panel for the line voltage available ( 1/8 amp slow-blow).

2-19. RACK MOUNTING.

2-20.

Model 432A is narrower than full-rack width.

It is what is termed a sub-modular unit. When used alone, the instrument can be bench mounted. When used in combination with other sub-modular units it may be bench or rack mounted. The HP 1051A and

1052A Combining Cases and Rack Adapter Frames are designed specifically for this purpose.

2-21. COMBINING CASE.

2-22. A model 1051A Combining Case is shown in

Figure 2-1. This case is full rack width and accepts

varying combinations of submodular instruments. The case, purchased separately, is provided with a rack mount ing kit.

The combining case will hold three

2-1

Section II

Installation

Figure 2-1.

Sub -module Installation in

Rack Adapter Frame

Model 432A

instruments the same size as the Model 432A. When instruments are installed in the combining case, they may be installed or removed individually.

2-23. ADAPTER FRAMES.

2-24. The 5060-0797 Adapter Frame is shown in Fig-

ure 2-2.

The frame will accept a variety of submod u l a r u n i t s i n a m a n n e r s u i t a b l e f o r r a c k m o u n t i n g .

Submodular units, in combination with anv necessarv spacers are assembled within the frame.

ular unit cannot be removed individually.

A submod-

2 - 2 5 . R E P A C K I N G F O R S H I P M E N T .

2 - 2 6 . W h e n r e t u r n i n g a n i n s t r u m e n t to Hewlett-

Packard use the original packing material.

If the orig inal foam type packing material is not available, contact an authorized HP Sales Office for assistance. If this is not possible, first protect the instrument surfaces by wrapping in heavy kraft paper or with sheets of cardboard flat against the instrument, Protect the instrument on all s i d e s using approximately 4“ of packing material and pack in a durable container. Mark the container clearly for proper handling and insure adequately before shipping.

2-27. When an instrument is returned to HP for service or repair, attach atagtothe instrument specifying t h e o w n e r a n d d e s i r e d a c t i o n . A l l c o r r e s p o n d e n c e should identify the instrument by model number and full eight -digit serial number.

2-2

Figure 2-2.

HP Model 1051A Combining Case Instrument Installation

Model 432A

Section III

Operating Instructions

SECTION Ill

O P E R A T I N G I N F O R M A T I O N

3-1. INTRODUCTION.

3-2. The Model 432A Power Meter operates with HP temperature-compensated thermistor mounts such as the 8478B and 478A Coaxial, and 486A Waveguide series. The frequency range of the 432A with these mounts in 50-ohm coaxial systems is 10 MHz to 18 GHz; in waveguide systems it is 2.6 GHz to 40 GHz. Fullscale power ranges are 10 microwatts to 10milliwatts

(-20 dBm to +10dBm). Extended measurements may be made to 1 microwatt (-30 dBm). The total measurement capacity of the instrument is divided into seven ranges, selected by a f rent-panel RANGE switch.

3-3. This section describes general operating procedures and error analysis in microwave power messurement. Application Note 64, available on request from Hewlett-Packard, is a detailed analysis of microwave power measurement problems and techniques.

3-4. CONTROLS, CONNECTORS, AND

INDICATORS.

3-5. The front and rear panel controls, connectors,

and indicators are explained in Figure 3-2. The des-

c riptions are keyed to the corresponding items which are indicated on the figure.

3-6, The COARSE ZERO and FINE ZERO controls zero the meter. Zero carry-over from the most sensitive range to the other six ranges is within ± 0.5%.

When the RANGE switch is set to COARSE ZERO, the meter indicates thermistor bridge unbalance, and the front panel COARSE ZERO adjust is for initial bridge balance. For best results, FINE ZERO the 432A on the particular meter range in use.

3-7. The CALIBRATION FACTOR switch provides discrete amounts of compensation for measurement uncertainties related to SWR and thermistor mount efficiency. The Calibration Factor value permits direct meter reading of the RF power delivered to an impedance equal to the characteristic impedance (Z o of the transmission line between the thermistor mount

) and the RF source. Calibration Factor values a r e marked on the label of each 8478B, 478A, or 486A

Thermistor Mount.

For further details, see Paragraph 3-23.

3-8. The MOUNT RESISTANCE switch on the front panel compensates f o r t h r e e types of thermistor mounts. Model 486A waveguide mounts can be used by setting the MOUNT RESISTANCE switch to

100Ω or

200Ω, depending on the thermistor mount used

(refer to Table 1-2). The

200Ω position is used with

Models 478A and 8478B Thermistor Mounts.

3-9. The rear-panel BNC connector lab e 1 ed RE-

CORDER provides an output voltage linearly propor tional to the meter current; 1 volt into an open circuit equals full- scale meter deflection. This voltage is developed across a lK resistor; therefore, when a recorder with a lK input impedance is connected to the RECORDER output, approximately .5 volts will equal full scale deflection. This loading of the RE-

CORDER output has no effect on the accuracy of the

432A panel meter.

3-10. A digital voltmeter can be connected to the rearpanel RECORDER output for more resolution of power meter readings. When a voltmeter with input impedance greater than 1 megohm is connected to the RE-

CORDER output, 1 volt equals full scale deflection.

3-11. The 432A has two calibration jacks (V

RF and vcomp) on the rear panel that can be used for precision power measurements.

Instrument error can be reduced from ±1% ±(0.2% of reading +5µW) of reading, depending on the care taken in measurement, and on the accuracy of auxiliary equipment.

For further information, see Paragraph 3-27.

3-12. BATTERY OPERATION,

3-13. The Model 432A Option 01 operates from battery and conventional 115- or 230-volt line power. A rechargeable Nickel-Cadmium b a t t e r y is factoryinstalled in Option 01 instruments. The same battery can be ordered and later installed in the basic instrument, thereby modifying the power meter to the Option

01 configuration. The battery installation kit (including battery charging circuit ) may be ordered from the nearest HP Sales Office.

3-14. It is recommended that the Model 432A be battery -operated for up to 8 hours, and then allowed to recharge 8 hours, or overnight.

Continuous battery operation is possible for up to about 24 hours, but then the battery must be recharged f o r about 24 hours.

3-15. The 432A automatically operates on its internal batteries whenever the ac line power is disconnected and the POWER switch is ON. When the battery terminal voltage decreases far enough to f orce the power supply voltage regulator out of regulation, then the meter stops working and the meter indicator points to the red RECHG BAT. To recharge the battery, simply connect the 432A to ac line power, and turn it ON.

3-16. Battery Storage.

Storage of the battery at or below room temperature is best, Extended storage at temperatures above room temperature will reduce cell charge, but will not damage the battery; however, the battery should not be stored where the temperature exceeds 60” C (+140° F).

3-1

Section III

Operating Instructions

3-17. M I C R O W A V E P O W E R M E A S U R E M E N T

A C C U R A C Y .

3-18. A number of factors affect the overall accuracy o f p o w e r m e a s u r e m e n t .

The major sources of error a r e m i s m a t c h e r r o r , R F l o s s e s , a n d i n s t r u m e n t a t i o n e r r o r .

3 - 1 9 . M i s m a t c h E r r o r .

In a practical measurement situation, both the source and thermistor mount have

SWR, and the source is seldom matched to the ther mister mount unless a tuner is used. The amount of mismatch loss in any measurement depends on the total

SWR present.

The impedance that the source sees is determined by the acutal thermistor mount impedance, the electrical length of the line, and the characteristic impedance of the line, Z o

.

3-20. In general, neither the source nor the thermistor mount has Z

O impedance, and the actual impedances are known only as reflection coefficients, mismatch losses, or SWR. The power delivered to the thermistor mount - and hence the mismatch loss - can only be described as being somewhere between t w o limits.

The uncertainty of power measurement due to mismatch l o s s i n c r e a s e s w i t h S W R . L i m i t s o f m i s m a t c h l o s s are generally determined by means of a chart such as the Mismatch Loss Limits charts in Application Note

6 4 . T h e t o t a l m i s m a t c h 1 o s s u n c e r t a i n t y i n p o w e r m e a s u r e m e n t i s d e t e r m i n e d b y a l g e b r a i c a l l y a d d i n g the thermistor mount losses to the uncertainty caused by source and thermistor mount 2

0 m a t c h .

3 - 2 1 . R F L o s s e s .

RF losses account for the power entering the thermistor mount but not dissipated in the d e t e c t i o n t h e r m i s t o r e l e m e n t .

Such losses may be in the walls of a waveguide mount, the center conductor o f a c o a x i a l m o u n t , c a p a c i t o r d i e l e c t r i c , p o o r c o n nections within the mount, or due to radiation.

3-22.

+55°c.

Instrumentation Error. The degree of inability of the instrument to measure the substitution power supplied to the thermistor mount is called power meter a c c u r a c y o r i n s t r u m e n t a t i o n e r r o r . I n s t r u m e n t a t i o n error of the Model 432A is ±1% of full scale, O“C to

3 - 2 3 . C A L I B R A T I O N F A C T O R A N D E F F E C T I V E

E F F I C I E N C Y .

3-24. Calibration factor and effective efficiency are correction factors for improving power measurement accuracy. Both factors are marked on every HP ther m i s t e r m o u n t . C a l i b r a t i o n f a c t o r c o m p e n s a t e s f o r thermistor mount VSWR and RF losses whenever the thermistor mount is connected to an RF source without a tuner. Effective efficiency compensates for ther mister mount RF losses when a tuner is used in the m e a s u r e m e n t s y s t e m .

3-25. When the 432A CALIBRATION FACTOR selec tor is set to the appropriate factor indicated on the thermistor mount, the power indicated by the meter is the power that would be delivered by the source to

3-2

a load impedance equal to Z

Model 432A

o

, M o r e a c c u r a t e l y , t h e relationship between indicated power and the power available to a Z. load is given by the following equation:

Calibration factor d o e s not compensate for source

VSWR, or for multiple reflections between the source and the thermistor mount.

3-26. To minimize mismatch between the source and t h e t h e r m i s t o r m o u n t w i t h o u t a t u n e r , i n s e r t a l o w

SWR precision attenuator in the transmission line between the thermistor mount and the source. Since the mount impedance (and corresponding SWR) deviates significnatly only at the high and low ends of a microwave band, it is generally unnecessary to use a tuner.

A tuner or other effective means of reducing mismatch error is recommended when the source SWR is high or when more accuracy is required. For further det a i l s , t h e r e i s a c o m p l e t e d i s c u s s i o n o f m i c r o w a v e p o w e r m e a s u r e m e n t w i t h e m p h a s i s o n m o d e r n t e c h niques, accuracy considerations and sources of error available in Application Note 64.

3 - 2 7 . P R E C I S I O N P O W E R

M E A S U R E M E N T .

3-28. GENERAL.

3 - 2 9 . U s i n g p r e c i s i o n i n s t r u m e n t s a n d c a r e f u l p r o cedures, measurement error can be reduced to ±0.2% of reading +0.5 µW. The technique involves: 1) zeroing the bridge circuits and measuring the bridge ampl i f i e r o u t p u t v o l t a g e d i f f e r e n c e w i t h a d i g i t a l v o l t meter, then 2) connecting RF power to the thermistor mount and then measuring the bridge amplifier output voltage difference again, and 3) calculating the power

f r o m ‘ t h e t w o m e a s u r e m e n t s . F i g u r e 3 - 1 s h o w s t h e

i n s t r u m e n t s e t u p f o r d c s u b s t i t u t i o n m e a s u r e m e n t .

Use an HP Model 3440A DVM, with a 3443A Plug-in

Unit or a digital voltmeter with equivalent accuracy,

3-30. MEASUREMENT PROCEDURE.

a. Connect the DVM to the 432A rear panel Vcomp a n d V

RF o u t p u t s .

Be sure that the digital voltmeter input is isolated from chasses ground, b. Turn off, or disconnect the RF power from the t h e r m i s t o r m o u n t .

Model 432A

Figure 3-1. Precision Power Measurements

Section III

e. Release the FINE ZERO toggle, and turn on, or reconnect the RF power to the thermistor ,mount.

3-3

Section III

General Information

Model 432A

3-4

Figure 3-2. Front Panel Controls, Connectors and Indicators (Sheet 1 of 2)

Model 432A

Section III

Operating Information

1.

POWER. Instrument power ON/OFF switch;

connects either ac line voltage or internal battery (Option 01 only) to internal voltage regu later circuits. When ac power is on, optional battery charging circuit operates.

2.

COARSE ZERO. Meter zero adjustment; set the RANGE selector to COARSE ZERO, turn

OFF the RF power, and adjust to zero the meter.

3.

RANGE. Power measurement range selector; selects ranges from 0.01 to 10 milliwatts (-20 to +10dBm). COARSE ZERO setting is used to zero meter with no power applied to ther mistor mount.

4.

FINE ZERO.

Electronic zero that balances the compensation bridge with zero RF input.

To zero m e t e r during operation, close the switch momentarily.

Be sure that RF power is not applied to the thermistor mount when the

FINE ZERO switch is depressed.

5.

Meter.

Indicates power input to thermistor mount in milliwatts and dBm. To use the dBm scale, note the value in dBm of the range in use, and subtract from it the reading on the meter dBm scale.

6. Mechanical Meter Zero. Sets meter suspension so that meter indicates zero. To adjust the zero: a. Turn POWER switch off.

b. Turn the adjustment screw clockwise until the indicator falls below zero and comes back up to zero again.

c. Turn the adjustment very slightly counterclockwise to free up tbe mechanism from the adjusting peg.

7.

CALIBRATION FACTOR. Amplifier gain compensation selector. Set to correspond to the calibration factor printed on t h e thermistor

mount body. See Paragraph 3-23 for m o r e

information.

8.

MOUNT RESISTANCE. Se1ects resistance

equal to that of mount in use to balance bridges.

Table 1-2 lists Hewlett-Packard thermistor

mounts and resistances. Set with meter power

OFF, when mount is initially connected to the meter.

9.

Thermistor Mount Cable Connector. Input connectorfor 5-1/2 foot cable that connects to the

478A, 8478B, or 486A Thermistor Mounts.

Figure 3-2. Front Panel Controls, Connectors and Indicators (Sheet 2 of 2)

3-5

Section III

Operating Information

Model 432A

3-6

Figure 3-3. Rear Panel Controls and Connectors (Sheet 1 of 2)

Model 432A

Section III

Operating Information

1,

Line Fuse.

For 115 Vac or for 230 Vac use

1/8 amp slow-blow fuse.

2.

Power Cord Input. Use power cord provided,

HP 8120 -00?8. Line power limits are 115/230

Vat, 50-400 Hz. Check FUSE rating and

P O

sition of line voltage slide switch before connetting power.

3.

Line Voltage Slide Switch: Set to line voltage avallable (115 or 230 Vat, 50-400 Hz).

4.

Mounting Hole for Option 02 Model Power

Meters.

Thermistor mount cable connector installed and wired in parallel with f rent-panel connector. Only one mount at a time may be used with the power meter.

5.

V

RF

Input. Connected directly to RF bridge.

Used for calibrating power meter with HP 8477A

Power Meter Calibrator. Also used for precision power measurements.

6.

VCOMP Input. Connected directly to compensation bridge. Used for calibrating power meter with HP 8477A Power Meter Calibrator. Also used for precision power measurements.

7.

RECORDER OUTPUT. Voltage f r o m meter

circuit to be used for recorder or digital voltmeter. Output impedance is approx.

1000Ω.

Figure 3-3. Rear Panel Controls and Connectors (Sheet 2 of 2)

3-7

Section III

Operating Information

Model 432A

3-8

Figure 3-4. Turn On and Zeroing Procedure (Sheet 1 of 2)

Model 432A

Section III

Operating Information

1. Connect the thermistor mount and cable to

THERMISTOR MOUNT connector. Refer to

Table 1-2 for recommended thermistor mounts

and their frequency ranges.

2.

Meter Mechanical Zero: a. With the instrument turned off, rotate the meter adjustment screw clockwise until the pointer approaches the zero mark from the left.

b. Continue the clockwise rotation until the pointer coincides with the zero mark. If the pointer overshoots, continue rotating the adjustment screw clockwise until the pointer once again approaches the zero mark from the left.

C

. Rotate the adjustment screw about three degrees counterclockwise to disengage screw adjustment from the meter suspension.

3.

Set the MOUNT RES switch to correspond to the operating resistance of thermistor mount used.

4, Turn the 432A POWER switch ON. For battery operation, the AC LINE indicator does not turn on.

5. Set the RANGE selector to COARSE ZERO and then zero the meter with the COARSE ZERO screwdriver adjustment.

Note

The power meter should be zeroed with the

RF power source turned off, or the mount disconnected from the source.

6. Set the range selector to the 0.01 mW range; then depress the FINE ZERO switch until the meter indicates zero.

Note

Range-to-range zero carryover is 1 ess than ±0.5% if the meter zero has been adjusted (step 2 above), and the instrument has been properly zero-set on the sensi tive range. For maximum accuracy, zeroset the power meter on the range to be used.

7.

Set CALIB FACTOR switch to correspond to

Calibration Factor imprinted on HP thermistor mount label.

8.

Apply RF power to the thermistor mount. Power is indicated on the meter directly in mW or dBm.

Figure 3-4. Turn On and Zeroing Procedure

3-9

Model 432A

Section IV

Principles of Operation

4-1.

SIMPLIFIED DESCRIPTION

4-2. The HP 432A Power Meter consists of two major sections: the bridge and meter logic assemblies, The instrument also contains an auto zero circuit which provides for automatic zeroing on any range. A simplified Mock diagram of the HP 432A is shown in

Figure 4-1.

4-3. The bridge section contains circuits which form two self-balancing bridge circuits when a suitable thermistor mount is connected to the 432A. Each bridge is automatically brought to balance by the action of a high gain dc amplifier feeding power to the top of the bridge, The voltage at the top of the RF bridge V

RF is responsive to both input RF power and ambient temperature changes.. The voltage at the top of the compensation bridge, V

COMP is responsive only to ambient temperature changes. Knowing V

R F and V

C O M P

, the RFpower can be calculated.

4-4. The meter logic section processes V

RF a n d

V

COMP to produce a meter current proportional to

RF power.

The sum (V

RF

+ V

C O M P

) controls the width of 5 kHz pulses. The difference (V

COMP

- V

R F

) is chopped, amplified and fed to an electronic switch actuated by the controlled width pulses. Therefore, the meter current is pulses of variable height and width with the meter indicating the average current.

(This process produces a meter current proportional to (V

RF

+ V

C O M P

) (V

RF

-

V

C O M P

). Paragraph 4-10

explains why this is necessary.

4-5. FUNCTIONAL BLOCK DIAGRAM

4-6. A functional block of the 432A power meter is

shown in Figure 4-2. The instrument comprises two

major assemblies: bridge assembly Al and meter logic assembly A2.

Auto zero circuit Al Al, which provides for automatic zeroing of the instruemtn, is included as part of logic assembly Al.

4-7. The thermistor bridges are biased with direct current from the bridge amplifiers.

Each bridge amplifier supplies enough heating current to br ing the thermistor resistance to 100 or 200 ohms, depending upon the setting of the MOUNT RESISTANCE switch on the 432A. If one of the thermistor bridges is unbalanced due to incorrect thermistor resistance, an error voltage occurs and is amplified by the bridge amplifier. The error voltage is applied to the top of the bridge and changes the power dissipation of the negative temperature coefficient thermistor.

T h e change of power dissipation causes the resistance to the thermistor to change in the direction required to balance the bridge. Application of RF power to the

RF bridge heats the thermistor and lowers its resistance. The bridge circuit responds by reducing the dc voltage applied to the top of the bridge thus maintaining bridge balance.

S E C T I O N I V

PRINCIPLES OF OPERATION

4-8. If ambient temperature causes changes in the thermistor resistance, the bridge circuits respond by applying an error voltage to the bridges to maintain bridge balance.

The voltage at the top of the RF bridge is dependent upon both ambient temperature and the RF input. The voltage at the top of the compensation bridge is dependent upon the ambient temperature only. The power meter reading is brought to zero with no applied RF power by making V

C O M P equal to V

RF so (V

COMP

- V

R F

) equals zero. Since ambient temperature causes both thermistors to respond similarly, there will be no net difference between the amplifier output voltages. Therefore, any difference in output voltages from the bridges is now due to RF power absorbed by the thermistor mount.

4-9. The RF bridge voltage, V

R F

, and the compensation bridge voltage, V

COMP

, contain the “RF power” information. To provide a meter reading proportional to RF power the dc voltages (V

R F

, V

C O M P

) must be further processed by the meter logic circuits.

4-10. The required processing is derived as follows:

P. is absorbed power needed by the RF thermistor to bring its resistance to R ohms (100 or 200 ohms).

P. consists of two components: RF power from the signal source to be measured and dc power supplied by the 432A.

The self balancing action of the bridge circuit automatically adjusts the dc power so that the

4-11. RFpower can redetermined by measuring VRF with and without applied RF power and then doing some arithmetic. But this power measuring scheme is neither convenient nor temperature compensated

(since P. changes with temperature). The 432A introduces another thermistor bridge circuit exposed to the same ambient temperature but not RF power.

This circuit includes adjustments (COARSE and FINE

ZERO) so that the dc voltage V

COMP at the top of its bridge can be set equal to V

R F

. Assuming matched

RF and compensation thermistors, V

R F

O

(with no RF power) and V

COMP remain equal with ambient temperature fluctuation.

They cliff er only when the RF power to be measured is applied to the RF thermistor.

Thus, we have

4-1

Section IV

Principles of Operation

Combining equations, we have

4 - 1 2 . T h u s a n R F p o w e r m e a s u r e m e n t r e d u c e s t o setting V

C O M P

= V

R F

O

(with zero RF power) initially, measuring V

C O M P and VRF, and computing with the above formula. The 432A carries out the computation by forming the indicated sum and difference, performing the multiplication and displaying the result on a m e t e r .

4 - 1 3 . T h e m e t e r l o g i c c i r c u i t s c h a n g e t h e t w o d c

voltages to two pulse signals which contain all the RF power information. One of the signals will be a square w a v e w h o s e a m p l i t u d e i s p r o p o r t i o n a l t o V

C O M P

-

V

R F

.

The other signal will have a pulse width proportional to V

COMP

-

= V

RF

.

4-14. The V

C O M P

- V

RF s i g n a l i s o b t a i n e d b y t a k i n g the dc voltage outputs from the Al assembly and applying them to a chopper circuit. This chopper circuit is driven by a 5-kHz multivibrator. The output of the chopper is a square wave signal whose amplitude is proportional to V

C O M P

- V

R F

. The output of the chopper is coupled to the range amplifier and then to the calibration factor amplifier. The amplification that the signal receives in these two amplifiers depends upon the setting of the RANGE switch and the

CALIBRATION FACTOR switch.

The output of the calibration factor amplifier is V. This current is fed to the electronic switch. A square wave current with a m p l i t u d e p r o p o r t i o n a l t o ( V

C O M P

- V

R F

) .

Model 432A

4-15. The V

C O M P

+ V

RF signal is obtained by taking the two dc voltages from Al assembly through a summing circuit and feeding this voltage to a voltage-tot i m e c o n v e r t e r .

T h e v o l t a g e - t o - t i m e c o n v e r t e r i s driven by a 5-kHz multivibrator. The output of the v o l t a g e - t o - t i m e c o n v e r t e r i s a s i g n a l w h o s e p u l s e w i d t h i s p r o p o r t i o n a l t o t h e s u m o f V

C O M P

+ V

R F

.

This signal controls the electronic switch. From the

V

C O M P

- V

R F a n d V

C O M P

+ V

R F i n p u t s , t h e e l e c tronic switch provides a 5-kHz pulse train whose amplitude is proportional to V

C O M P

- V

RF and whose pulse w i d t h i s p r o p o r t i o n a l t o V

C O M P

+ V

R F

. The pulse width is always 90 msec or less.

4 - 1 6 . T h e b i a s c i r c u i t s w i t c h a n d f i l t e r p r o v i d e s a zero current reference for the meter circuit. This is accomplished by controlling the dc bias to the first stage of the calibration factor amplifier. This circuit, in effect, restores the dc component to the square wave which has been amplified by ac coupled amplifiers.

4 - 1 7 . T h e m e t e r i s 0 - 1 m A , f u l l - s c a l e m e t e r t h a t h a s a c a p a c i t o r a c r o s s i t s t e r m i n a l s . T h e c a p a c i t o r integrates the output pulses from the current switch so the current into the meter is proportional to the time average of the input pulses. That is, the input current to the meter is proportional to the product of

4-18. The output from the meter is further filtered so the voltage at the rear panel RECORDER output is suitable for use with either a digital voltmeter or X-Y recorder. The RECORDER output voltage is returned to the compensation bridge through the automatic zero c i r c u i t w h e n t h e F I N E Z E R O s w i t c h i s d e p r e s s e d .

The automatic zero circuit holds a correction voltage at the input of the compensation bridge amplifier, so when the RF is zero, the meter indication will also be zero.

4-2

Section V

Maintenance

Table 5-1.

Model 432A

Figure 5-2

5-0

Model 432A

Section V

Maintenance

SECTION V

M A I N T E N A N C E

5-1. INTRODUCTION.

5-2. This section provides information for perfor mance testing, adjusting, troubleshooting and repairing the 432A Power Meter.

Performance tests allow the instrument to be checked for conformance to specifications. If performance is not within specifications, adjust or troubleshoot the instrument.

5-3. CONTENT.

5-4. PERFORMANCE TESTS .

5-5. The procedures test power meter performance for incoming inspection, periodic evaluation, cali-

bration and troubleshooting, Specifications in Table 1-1

are the performance standards. If the power meter fails to meet any of the performance test specifications. refer to the troubleshooting diagrams.

5-6.

ADJUSTMENTS

5-7. Procedures describe the adjustments necessary to calibrate the power meter. Adjust the power meter only when it is determined that the meter is out of adjustment, and not malfunctioning due to a circuit failure.

5-8. To avoid errors due to possible ground loop currents, isolate the power meter from ground used for other auxiliary equipment. A power plug adapter that removes the ground connection at the line outlet can be used to isolate the power meter.

5-9. Several circuit components are factory-selected to meet specific circuit requirements. The factory selected parts are indicated on the schematic diagrams.

5-10. TEST EQUIPMENT.

5-11. Instruments and accessories required for adjusting and testing the power meter are listed and

briefly described in Table 5-1. Instruments used to

maintain the instrument must m e e t or exceed the specifications given.

5-12. SERVICE INFORMATION.

5-13. Service information in the f o r m of troubleshooting, waveforms, schematics, and component 10-

cations are given in Section VII. Also, an overall sys-

tem block diagram is included which contains keyed numbers corresponding to the test points.

Figure 5-1. Check and Adjustment Test Set -up

5-14. 432A

PERFORMANCE TESTS

WITH 8477A CALIBRATOR

5-15.

INITIAL SET-UP.

a. Connect the 8477A outputs to the 432A inputs as

shown in Figure 5-1. Use appropriate test equipment

as listed in Table 5-1.

b. If necessary, mechanically zero the meter movement as follows:

(1) With instrument turned off, rotate meter adjustment screw clockwise until pointer approaches zero mark from the left.

(2) Continue rotating clockwise until pointer coincides with zero mark. If pointer overshoots, continue rotating adjustment screw clockwise until pointer once again approaches zero mark from the left.

(3) Rotate adjustment screw about three degrees counterclockwise to disengage screw adjustment from meter suspension.

5-16. METER ACCURACY TEST.

a. Set the 8477A Calibrator controls as follows:

POWER . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.0lmW

FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..

200Ω

ZERO/TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ZERO b. Set the 432A controls as follows:

MOUNT RESISTANCE.. . . . . . . . . . . . . . . . . . .

..200Ω

RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0lmW

POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ON

CALIBRATION FACTOR . . . . . . . . . . . . . . . . . . . ...100%

5-1

Section V

Maintenance

c. Adjust 8477A ZERO knob for 0 volts cation on the DVM.

±2 mV indi d. Set the 8477A controls as follows:

POWER . . . . . . . . . . . . . . . . . . . . . . . .

ZERO/TEST . . . . . . . . . . . . . . . . . . . . . . . . .

.. 0.01mW

. . . . . TEST e. The digital voltmeter should indicate 1000 ±10 millivolts.

f. The 432A meter should indicate full scale ±1/2 division.

g. Repeat steps d through f for each of the other ranges. Set the power meter range selector to the

position indicated in Column 1 of Table 5-2, and set

the 8477A meter reading selector to the corresponding

position indicated in Column 2 of Table 5-2. In each

case, the meter indications should correspond to those

shown in Table 5-2, Columns 3 and 4.

Model 432A

f. Repeat steps d and e for each position of the

CALIBRATION FACTOR selector. In each case, the digital voltmeter should indicate the voltage shown in

the second column of Table 5-3 for the CALIBRATION

FACTOR shown in the first column.

Table 5-3. Calibration Factor Test

Table 5-2. Meter Accuracy Test

5-17. CALIBRATION FACTOR TEST.

a. Set 432A controls as follows:

RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.1 mW

CAL FACTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88%

MOUNT RESISTANCE . . . . . . . . . . . . . . . . . . . ...2000

b. Set 8477A controls as follows:

FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

..200Ω

ZERO/TEST Switch . . . . . . . . . . . . . . . . . . . . . . . .. TEST

POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.lmW

c. Set 8477A ZERO control sothatthe digital voltmeter reads 1000 ±2 mV.

d. Set the calibration factor selector to 89%.

e. The digital voltmeter should indicate 989 ±10 millivolts.

5-2

5-18. METER LINEARITY CHECK.

a. Set the 8477A POWER (MW) selector to 1 mW, and FUNCTION to

200Ω,

ZERO/TEST switch to TEST.

b. Set the 432A RANGE selector to 3 mW, MOUNT

RESISTANCE to

200Ω.

c. The 432A meter should indicate 1 mW ±1/2 division.

d. Set the 8477A POWER (MW) selector to 2 mW.

e. The 432A meter should indicate 2 division.

mW ±1/2 f. Set the 8477A POWER (MW) selector to 3 mW.

g. The 432A m e t e r should indicate 3 division.

mW ±1/2

5-19. ZERO CARRYOVER TEST.

a. Disconnect the 432A from the 8477A.

b. Turn the 432A power OFF, and connect the ther mister mount cable to a thermistor mount.

Model 432A

f. Depress FINE ZERO switch (the fine zero circuit is at the other end of its range). Meter should indicate below 2 on the 0-3 scale. Record the indication.

g. Release FINE ZERO.

Section V

Maintenance

h. Rotate RANGE switch to COARSE ZERO position.

The fine zero circuit is now in the center of its range.

The meter reading should be (1.5 + reading of +1/2 of reading in step f, ±0.1 on the 0-3 scale.

Figure 5-2. Zero Carryover Test Setup

c.

Set the

432A Power Meter MOUNT RESISTANCE selector to the resistance shown on the thermistor mount, d. Turn ON the 432A power.

e. Connect 141A through ftiltering network to rear

of 432A as shown in Figure 5-2.

Set 141A controls as follows:

INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DC

Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . 1 mV/cm

SWEEPT ICE . . . . . . . . . . . . . . . . . . . . . . . . . . 2 see/cm

TRIGGER LEVEL . . . . . . . . max clockwise (free run) f. Zero the 432A as follows:

1) Set the RANGE selector maximum cw to

COARSE ZERO.

2) Set the COARSE ZERO screwdriver adjust so that the meter indicates zero.

3) Set 432 ARANGE switch to .01 mW. Depress the FINE ZERO switch. The meter indication should to to zero without overshoot.

g. Rotate the RANGE switch clockwise, one step at a time, while the oscilloscope is sweeping. On each

432 A range, the scope trace should be within .0lmW

divisions (±5 mV) from where it was on the .01 mWrange,

5-20. FINE ZERO RANGE CHECK.

a. Set the 432A RANGE selector to 0.3 mW. Leave the thermistor mount connected to the cable, and the

MOUNT RESISTANCE selector set to correspond to the resistance of the mount used.

b. Depress the FINE ZERO switch.

c. Slowly turn the COARSE ZERO screwdriver adjustment counterclockwise until the meter will no longer zero.

The FINE zero circuit is at one end of its range.

d. Release FINE ZERO.

e. Set the COARSE ZERO screwdriver adjustment so that the meter indicates full scale on the 0-3 scale

(0.3 ‘mW range).

5-21. 432A CALIBRATION WITHOUT 8477A

CALIBRATOR

5-22. The 432A Power Meter can be calibrated without an 8477A Calibrator using a method similar to the

precision power method outlined in Paragraph 3-27.

5-23. A major difference between the two measurements is that external power need not be applied when calibrating the instrument. Normally, in a stable environment, the V

C O M P output voltage remains constant, not being affected by external RF power; only the V

RF output varies during power measurement.

Since the power that the meter indicates is proportional to V

C O M P and V

R F

, we can cause the meter to indicate a power also by holding V

RF constant and varying V

C O M P

. This is easily done on the 432A by turning the COARSE ZERO control. Two calibration procedures are given below.

5-24. CALIBRATION PROCEDURE 1.

a.

Connect thermistor mount to power meter; let instrument warm up for at least 10 minutes.

b. Select range which instrument is to be calibrated on. Note: ranges below 0.3 mW require a precise differential voltmeter capable of resolving 1 µV. The

HP 740B DC Standard/A Voltmeter, which has an accuracy of ±(0.005% of reading ±0.0004%ofrange ±1µV) is recommended. A digital voltmeter is adequate for the 1.0 mW and higher ranges.

c. Connect Differential Voltmeter (or DVM differentially) between the V

COMP and V

RF output jacks

on the rear panel. See Figure 3-3 for location of V

R

F and V

COMP outputs.

d. While pressing the FINE ZERO switch, measure and record V

0

. (V. is the difference of the bridge voltages with no power applied. ) e. Turn COARSE ZERO control (on front panel) clockwise to a convenient power, e.g., 9 on the zero to

10 scale or 2 on the 0 to 3 scale.

f. Differentially measure and record V

1

. V

1 is the difference voltage between V

C O M P and V

RF w i t h power applied.

g. Measure and record V

C O M P

. Note that the

V

COMP jack is isolated from chassis ground; measure from the center conductor of the BNC to the outer conductor.

5-3

Model 432A

INSTRUMENT SERIAL NO.

DATE

Section V

Maintenance

TABLE 5-4. PERFORMANCE TEST CARD

Data in this test card corresponds to Performance Tests in

Paragraphs 5-16 through 5-20.

5-5

Section V

Maintenance

Para.

Ref.

5-16

f f f f f f e e f e e e e e

Test

TABLE 5-4. PERFORMANCE TEST CARD

Measurement

Unit

METER ACCURACY

0.01 mW applied; measure RECORDER OUT voltage mVdc

Meter indicates full-scale (0-1 scale) divisions

Repeat on remaining 432A power ranges:

Power applied: 0.03 mW

Meter indication (0-3 scale) mVdc divisions

Power applied: 0.1 mW

Meter indication (0-1 scale)

Power applied: 0. 3 mW

Meter indication (0-3 scale)

Power applied: 1 mW

Meter indication (0-1 scale)

Power applied: 3 mW

Meter indication (0-3 scale)

Power applied: 10 mW

Meter indication (0-1 scale) m.Vdc

divisions mVdc divisions mVdc divisions mVdc divisions mVdc divisions

Min.

990

-1/2

938.8

-1/2

990

-1/2

938.8

-1/2

990

-1/2

938.8

-1/2

990

-1/2

Model 432A

Actual Max.

1010

+ 1,/2

958.8

+ 1,/2

1010

+1/2

958.8

+1/2

1010

+ 1/2

958.8

+1/2

1010

+ 1,/2

5-6

5-17

i

CALIBRATION FACTOR

Calibration Factor (%)

88

89

90

91

92

93

94

95

96

97

98

99

100

DVM Reading (mVdc )

1000

989

9’78

967

957

946

935

926

916

907

897

889

880 mVdc mVdc mVdc mVdc mVdc mVdc mVdc mVdc mVdc mVdc mVdc mVdc mVdc

990

979

968

957

947

936

925

916

906

897

887

879

870

1010

999

988

977

967

956

945

936

926

917

907

899

890

Model 432A

Section V

Maintenance

c

5-18

e g

Para.

Ref.

Test

TABLE 5-4. PERFORMANCE TEST CARD

Measurement

Unit

METER LINEARITY

1 mW applied, 3 mW scale: meter indicates 1 mW divisions

2 mW applied, 3 mW scale: meter indicates 2 mW divisions

3 mW applied, 3 mW scale: meter indicates 3 mW divisions

Min.

-1/2

-1/2

-1/2

Actual Max.

+1/2

+1/2

+1/2

5-19

ZERO CARRY-OVER d

Zero carry-over:

Range (mW)

.01

.03

.1

.3

1

3

10

Scope Indication

0 ±5 mVdc

0 ±5 mVdc

0 ±5 mVdc

0 ±5 mVdc

0 ±5 mVdc

0 ±5 mVdc

0 ±5 mVdc mVdc mVdc mVdc mVdc mVdc mVdc mVdc

-5

-5

-5

-5

-5

-5

-5

+5

+5

+5

+5

+5

+5

+5

5-20

f

g

FINE ZERO RANGE

Meter indication on 1-3 scale:

Meter indication on 1-3 scale: 1.5+ 1/2 reading of step f.

divisions divisions

1.75

2.0

1.5

5-7

Model 432A

h. Calculate the power using the following formula?

where R is the resistance of the thermistor mount and should be identical to the setting of the MOUNT RE-

SISTANCE switch.

i. If calculated power is different from the value that was set with the COARSE ZERO control, adjust

A2R6 so that the meter reads calculated power. If the range of A2R6 is insufficient to set new power, it will be necessary to change the value of A2R70.

j. Set COARSE ZERO so that meter reads one on the 0 to 1’scale. Set A2R72 for 1.000 V±10 mV at the

RECORDER output jack on the rear panel.

5-25. There is a simpler form of the equation that was used to calculate power in step h above. This form ignores V o

, the small voltage difference between the two bridges with no power applied. However, V . becomes negligible on the higher ranges, that is, 1 mV and above, and can be ignored with little decrease in accuracy. I’he simpler form is as follows:

5-26. CALIBRATION PROCEDURE 2.

a. Connect thermistor mount to power meter; let instrument warm up for at least 10 minutes.

b. Select 1, 3, or 10 mW range.

c. Turn the COARSE ZERO control clockwise to indicate some convenient on- scale reading.

d. Measure V

COMP and record. Note that V

C O M P jack is isolated from chassis ground; measure from the center conductor of the BNC to the outer conductor.

e. Measure V

RF and record. Follow measurement procedure in step d.

f. Measure and record V

C O M P

- V

R F

. This term must be measured differentially, that is, one side of the DVM connected to V

COMP and the other side connected to V

R F

.

In this way the full resolution of the

DVM can be used.

g. Substituting the measured values into the above formula, calculate the power, h. If calculated power is different from the power set with the COARSE ZERO control, adjust A2R6 so that meter indicates that power. If the range of A2R6 is not great enough to set new power level, the value of A2R70 will have to be changed.

i. Adjust COARSE ZERO so that meter reads 1 on the O to 1 scale. Set A2R72 for 1.000 V ±10 mV at the

RECORDER output jack on the rear panel.

*This formula is accurate for on- scale readings; however, with no power applied (i. e., V

1

= V

0

) it does not solveto P = O because of a deleted term + V

0

. This term can be neglected for any on-scale reading.

5 - 8

Section V

Maintenance

5-27.

COVER REMOVAL AND

REPLACEMENT.

5-28.

The side covers can be removed and replaced independently of the top and bottom covers. Each side cover is held in place by four screws retained by nuts which are fastened to the side frames.

5-29. TOP COVER REMOVAL.

a. At the rear of the instrument, remove the screw that retains the cover.

b. Grasp the cover from the rear, and slide it back

1/2 inch. Then tilt forward edge of the cover upward and lift the cover from the instrument.

5-30. TOP COVER REPLACEMENT.

a. Rest the cover flat on the cast guides projecting inward near the top of each side frame.

b. Slide t h e cover forward, allowing its forward edge to enter the groove in the front panel.

c. Replace the cover retaining screw.

5-31. BOTTOM COVER REMOVAL.

a. Remove the retaining screw at the rear of the cover.

b. Swing the tilt stand out to free the cover c. Slide the cover rearward far enough to free the forward edge.

d. Tilt the forward edge of the cover upward and lift the cover from the instrument.

5-32. BOTTOM COVER REPLACEMENT.

a. Set the tilt stand out of the way of the cover b. Rest the bottom cover flat on the cast guides projecting inward near the bottom of each side frame.

c. Slide the cover forward on the guides so that the formed portion at the rear of the cover slides over the two short projections at the rear corner of each side frame.

d. Replace the retaining screw.

5-33. ADJUSTMENT PROCEDURES.

5-34. INITIAL SETUP.

a. Remove the power meter side panels.

b. Connect the equipment as shown in Figure 5-1.

Refer to Table 5-1 for equipment specifications.

5-35. MECHANICAL METER ADJUSTMENT.

a. Whenthe meter is properly zero-set, the pointer rests over the zero mark on the meter scale when the instrument is:

(1) at normal operating temperature

(2) in its normal operating position

(3) turned off

Section V

Maintenance

b. Set the pointer as follows to obtain best accuracy and mechanical stability:

(1) Turn instrument off.

(2) Rotate the meter mechanical adjustment screw clockwise until the meter pointer is to the left of zero and moving up the scale toward zero.

Stop when the pointer is exactly over the zero mark. If the pointer overshoots, repeat step 2.

(3) When the pointer is exactly on zero, rotate the adjustment screw approximately 3 d e g r e es counterclockwise.

This frees the adjustment screw from the meter suspension. If the pointer moves during this step, repeat steps 2 and 3.

5-36. BRIDGE AMPLIFIER TESTS a. Connect equipment as shown in Figure 5-3.

b. Compensation Bridge.

1. Connect 3440A/3443A between A1TP5 and

A1TP6 (using 10K isolation resistors).

2. Make the following settings:

432A

RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . .l0mW

MOUNT RESISTANCE . . . . . . . . . . . . . .

..200Ω

8477A

FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . .. SET

3. Adjust A1R12 (OFFSET ADJUST) for 0.0 ±0.1

mV dc reading on the digital voltmeter.

4. Change 8477A FUNCTION to CHECK. The digital VM reading should not exceed ±0.4

mVdc.

c . RF BRIDGE

1. Connect DVM between A1TP3 and AlTP4 using 10

κΩ isolation resistors in series with the leads.

3. Set 8477A FUNCTION to SET. Adjust A1R15

(OFFSET ADJUST) for DVM reading of 0.0

± 0.1 mVdc.

Figure 5-3. Bridge Amplifier Test

Model 432A

4. Change 8477A FUNCTION to CHECK. The reading should not exceed ±0.4 mVdc.

Note: Failure of the instrument to meet the specification of steps (4) of b and c above indicates insufficient

bridge gain. Refer to Table 7-3 or 7-4 in the trouble-

shooting section.

5-37. METER AND RECORDER OUTPUT

CALIBRATION a. Connect the DVM to the 432A RECORDER output.

b. Set 8477A controls as follows:

FUNCTION . . . . . . . . . . . . . . . . . . . .

200Ω

ZERO/TEST . . . . . . . . . . . . . . . . .. ZERO

POWER . . . . . . . . . . . . . . . . . . . . . . . 1mw c. Set 432A controls as follows:

MOUNT RES . . . . . . . . . . . . . . . . . . .

.200Ω

RANGE . . . . . . . . . . . . . . . . . . . . . . . . . lmW

CAL FACTOR . . . . . . . . . . . . . . . . . . . 100% d. Adjust ZERO control on 8477A for DVM indication of 0.000 ±.00IV.

e. ZERO/TEST on 8477A to TEST f. Adjust A2R6 in 432A for 432A meter reading of

1.0 mW ±.01 mW.

g. Adjust A2R74 in 432A for DVM reading of 1.0V

±.001V

h.

Change the following settings:

432A RANGE to 10 mW

8477A POWER (mW) to 10 mW and ZERO/

TEST to ZERO.

Note: When switching 432A to 10 mW or switching from 10 mW to any other range, the meter will react slowly for a short period. This is due to time constants in the instrument and is normal.

i.

Zero instrument as in step d and c.

j.

Adjust A2R86 for DVM reading of 1.00 ±.00 IV.

k.

Return 432A RANGE and 8477A POWER switches to 1 mW and zero as before.

1. Adjust A2R6 for DVM reading of 1.000 ±.00 1V.

m. Perform the adjustments of steps h through 1 again until 432A reads 1 ±.010V (at recorder output) on both 1 mW and 10 mW ranges.

n. Turn to the beginning of this section; verify that the instrument meets its specifications by completing the PERFORMANCE TESTS.

5-38. BATTERY CHARGER ADJUSTMENT

(OPTION 01 ONLY) a.

Remove the power meter top panel.

b.

Connect 432A to ac line power and turn ON.

5-9

Model 432A

c. Set A7R8 fully clockwise for maximum battery charge rate.

d. With the digital voltmeter, measure the voltage between A7TP1 and A7TP2.

e. Adjust A7R8 for digital voltmeter reading of 0.2

to 0.4 volts (20 to 40 mA through R3).

f. Disconnect the test equipment and power and replace the power meter top and side panels.

5-39. BATTERY REMOVAL

a. Remove the top cover.

b. Remove the two Phillips screws on the top rear of the battery cover.

c. Lift off the battery cover.

d. Loosen the nuts on the battery binding posts.

e. Lift out the battery.

Section V

Maintenance

5-43. To check a transistor, first see if the emitterbase diode is forward-biased by measuring the voltage difference between emitter and base. When using an electronic voltmeter, do not measure directly between emitter and base; there may be sufficient loop current between the voltmeter lead to damage the transistor.

Instead, measure each voltage separately with respect to a voltage common point (e.g. , chassis).

5-44. If the transistor base-emitter junction is forward-biased, the transistor conducts. If the diode is heavily forward-biased, the transistor saturates.

However, if the base -emitter diode is reverse-biased, the transistor is cut off (open). The voltage drop across a forward-biased emitter-base junction varies with transistor collector current. A germanium transistor has a typical base -emitter voltage of 0.2-0.3 volt with

1-10 mA collector current, and 0.4-0.5 volt with 10-

100 mA collector current. In contrast, base-emitter voltage for silicon transistors is about twice that for germanium types; about 0.5-0.6 volt for low collector current, and about 0.8-0.9 for high collector current.

5-40.

I S O L A T I N G T R O U B L E I N T R A N S I S T O R

C I R C U I T S .

5-41. General. The following information should help determine if a transistor works. There are tests for both in-circuit and out -of -circuit transistors, which help to determine if a particular trouble is due to a

faulty transistor or some other component. See Fig-

ure 5-2.

5-42. hi-circuit Testing. Intransistor Circuit testing the most important consideration is the transistor base-emitter junction. Like the control g r id of a vacuum tube, this is the control point in the transistor.

5-45. If the emitter base-junction is forward-biased, check for amplifier action by short-circuiting base to emitter while observing collector voltage. The transistor should stop conduction (cut off), which should shift the collector voltage close to the supply voltage.

Any difference is due to current leadage through the transistor.

In general, the smaller the current, the better the transistor.

If collector voltage does not change, the transistor has either an emitter-collector short circuit or emitter-base open circuit.

5-46. OUT-OF-CIRCUIT TESTING,

5-47. The two common causes of transistor failure are internal short - and open-circuits. Remove the transistor from the circuit and use an ohmmeter to

measure internal resistance. See Table 5-5 for meas-

urement data.

Table 5-5. Out-of-Circuit Transistor Resistance Measurements

Transistor Type

PNP Germanium

Small Signal

Power

I

Connect Ohmmeter

Positive Lead to Negative Lead to

I emitter emitter base * collector emitter emitter base* collector

Measure Resistance (ohms)

2 0 0 - 5 0 0

10K - l00K

3 0 - 5 0 several hundred

Small Signal base collector emitter emitter lK - 3K very high (might read open)

NPN Silicon

Power base collector emitter emitter

200 -1000 high, often greater than lM

To test for transistor action, add collector -base short.

Measured resistance should decrease.

I

5 - 1 0

Section V

Maintenance

Model 432A

Figure 5-4. Transistor Biasing and Operating Characteristics

5-11

Model 432A

Table 5-6. Etched Circuit Soldering Equipment

Section V

Maintenance

Table 5-7

5-12

Section V

Maintenance

5-48. COMPONENT REPLACEMENT IN

ETCHED CIRCUITS.

5-49. General. Etched circuit boards are sensitive to heat and to scratches with sharp objects. This is because the conductors are plated o n t o the circuit boards and the plating extends through the component mounting holes. Whenever possible, avoid unnecessary component substitution; it can damage the circuit

board and adjacent components. See Table 5-6 for

recommended tools and materials.

5-50. AXIAL-LEAD COMPONENTS .

5-51. Resistors, tubular capacitors and other axiallead components can be replaced without unsoldering,

Cut the component leads near the body of the defective component, remove the component and straighten the leads left in the board. Wrap leads of the replacement component one turn around the original leads, solder the connection, and clip off the excess lead.

5-52. OTHER COMPONENTS.

5-53. Replace other components as follows: a. Remove defective component from circuit board.

Use a low-power soldering iron because excessive heat may lift a conductor or damage the board.

Model 432A

b. Remove solder from mounting holes with a suction device or a wooden toothpick. DO NOT USE A

SHARP METAL OBJECT SUCH AS AN AWL OR TWIST

DRILL. SHARP OBJECTS MAY DAMAGE THE

PLATED-THROUGH CONDUCTOR.

c. Shape the leads of the replacement component to mat ch the mounting-hole spacing.

d. Insert the component leads in the mounting holes and position it as the original was. DO NOT FORCE

LEADS OF REPLACEMENT COMPONENT INTO

MOUNTING HOLES. A sharp edge on the lead may damage the plated -through conductor.

e. Solder the component in place and remove excess flux from the soldered a r e as. Apply a protective coating to prevent contamination and corrosion. See

Table 5-6 for recommendations.

CAUTION

Most ohmmeters can supply enough current or voltage to damage a transistor. Before using an ohmmeter to measure transistor forward or reverse resistance, c h e c k its open -circuit voltage and short -circuit cur rent output ON THE RANGE TO BE USED.

Open-circuit voltage must not exceed 1.5volts

and short-circuit current must be less than

3 mA.

5-13

SECTION VI

REPLACEABLE PARTS

6-3.

6-1. INTRODUCTION.

6-2. This section contains information for ordering

replacement parts. Table 6-1 lists parts in alpha-

numerical order of their reference designators and indicates the description and HP stock number of each part, together with any applicable notes. Miscella-

neous parts are listed at the end of Table 6-1, Table

6-2 lists parts in alpha-numerical order of their HP

stock number and provides the following information on each part: a. Description.

b. Manufacturer of the part in a five-digit code;

see list of manufacturers in Table 6-3.

c. Manufacturer’s part number.

d. Total quantity used (TQ column).

6-4.

table D-1

Appendix D

6-5.

To obtain apart that is not listed, include: a

+

Instrument model number.

b.

Instrument serial number.

c.

Description of the part.

d.

Function and location of the part.

A=

B=

BT = c=

CP

CR

DL

DS

E=

=

:

= assembly motor battery capacitor coupler diode delay line dmrice sisnaling (lamp) mist electronic part

.4= amperes automatic frequency cent rol

AFC

AMPL

=

= amplifier

BFO =

BE W =

BH =

BP =

BRS

BWO

=

= beat frequency oscillator berylltum copper btnder head bamfpaBs brass backward wave oscillator

Ccw

CER

CMO

COEF

COM cCmfP

COMPL =

CONN =

CP =

CRT

Cw

=

=

=

=

=

=

=

=

DEPC

DR

=

= counter-clockwise

Ceratic cabinet mount 0.19

coefficient common compaeition complete connector cadmium plate cathode -ray tube c10ckwi6e deposit ed cartwn drive

ELEcT =

EN CAP =

EXT =

F

FH =

FIL H = m=

G= electrolytic encapsulated external farads flat head fintst er head ftxed gisa (109) r e rmanium ikss gronndf ed)

01194-13

F

FL

Ic

J

K

L

Ls

M fdK

REFERSNCE DESIGNATORS

MP

.

.

fuse filter integrated ckrcult jack relay inductor loud spe&ker meter microphone

:

R

RT s

T

TB

TP

.

mechanical part plug transistor resistor thermistor switch transfmmer terminal board test point

H

HDw

HEX

HG

HR

Hz

IF

IMPG fNCD lNC L ms

INT

K

Lff

LIN

LK WASH

LOG

LPF

M

MEG

MET FLM

MET OX

MFR

MHZ fdfNAT

MOM

MTG hfY

N

N/C

NE

Nf PL henries hardware hexagonaf mercury hour(s) hertz

ABBRZVL4TIONS

N/O

Nm

NPN

NRFR

.

intermediate freq

Wnpregmated tncandeecent include(s) insulation fnternal

NSR

OBD on ox kno = 1000 left hand linear taper lock washer logarithmic taper low pass filter

P

Pc

PF

PH BRZ

PHL

PIV

PNP

.

miUi = 10-3 meg = 106 metal film metallic oxide manufacturer mega hertz mintature momentazy mounting

,.my~r. t nano (10-9) normally closed neon nickel plate

P/o mLY mRc ms mT

PP

PT

Pwv

RECT

RF m

.

normafly open negative positive zero

(zero temperature coefficient) negative -PO sitive negative not recommended for field replacement not separately replaceable order by description oval bead oxide peak f~f::a:~=”;o- 12 farade phosphor bronze

Phillips peak inverse voltage positive-negative positive part of polystyrene prcelain position(s) potentiometer peak-to-peak point peak working voltage rectifier radio frequency round head or right hand

v

VR w x

Y z

.

= vacuum, tube, neon bulb, photocell, etc.

voltage regulator cable socket

Crystal tuned cavity, net work

RMO

Riws

RWV

TA

TD

TGL

THD

TI

TOL

TRfM

TWT

S-B

SCR

SE

SECT

SEMICON =

Sf=

SfL

.

SL

SPG

SPL

SST

SR sTL

.

u

VAR

VDCW

WI w

Wfv w w/o rack mount only root- mean square reverse working voltage slow-blow screw selenium aection( .9) semicontictor silicon silver slide spring special stainless steel split ring steel tantalum time delay toggle thread titanium tolerance trimmer traveling wave tube micro = IO-6 variable dc working volts with watta working inverse voltage wirewmmd without

6-1

Section VI

Parts

Reference

Designation

@ Part No.

Table 6-1. Reference Designation Index

Description #

Al

A1Q8

A1Q9

A1Q1O

AIQ1l

A1Q12

A1Q13

A1Q14 hlQ15

tilRl

A1C12

A1C13

A1C14

ALCR1

A1CR2

AIQ1

A1Q2

A1Q3

AlQ4

A1Q5

AlQ6 klQ7 hlR2

A1R3

41R4

?41R5

klR6

AIC1

A1C2

A1C3

A1C4

ALC5

A1C6

AIC7

A1C8

A1C9

A1C1O

AIC1l

00432-6001

00432–2001

0180-0374

0160-2930

0160–2930

0160-0380

0160-2930

0160-2930

0160–2930

0160–0380

0160-2930

0160-2930

0160–29>0

0180-0374

0160-2264

0160–2264

1901–0040

1901-0040

1S53-0020

1853–0020

1853–0020

1854–0071

1854-0071

1853-0001

1854-0221

1854-0071

1854-0071

1854-0071

1853-0001

1854-0221

1854-0071

1853-0020

1853-OOZLI

0698-3260

0686–1055

0698–3160

0698-3160

0698-31b0

13LIAR0 AS SY:BRIOGE tMJARO: BLANK PC

C:FXD ELECT 10 UF 10%, 20VOCH

C:FXO CER 0.01 UF +80-20% loovoGH

C:FXD CER 0.01 UF +80-20% 100VDCH

C:FXO MY 0.22 UF 10% 200VDCW

C:FXO CER 0.01 UF +80-20% loovDcH

C:FXO CER 0.01 UF +80-20% 100VOCW

(,:FXD CER 0.01 UF +S0–20% 100VDCW

C:FXO MY 0.22 UF 10% 200VDCW

C:FXO CER 0.01 UF +80-20% 100VOCW

(,:FXD CER 0.01 UF +80-20% 100VOCW

C,:FXD CER 0.01 UF +80–20% 100VOCW

C:FXD ELECT 10 UF 10% 20VOCW

C:FXD CER 20 PF 5% 500VOCW

L:FXO CER 20 PF 5% 500VOCW

DIDDE:SILICON 30MA 30WV

I)1OOE:SILICON 30MA 30WV

TRANSISTOR:SILICON PNP

TRANSISTOR: SILICON PNP

TRANSISTOR:SILICON PNP

TRANSISTOR:SILICON NPN

TRANSISTOR:SILICON NPN

TRANSISTOR:PNP SILICON 30V 900MW

TRANSISTOR OUAL:SILICON NPN

FAcToRY SELECTED PART

TRANSISTOR: SILICON

NPN

TRANSISTOR:SILICON NPN

TRANSISTOR:SILICON NPN

TRANSISTOR:PNP SILICON 30V 900MW

TRANSISTOR OUAL:SILICON NPN

FACTORY SELECTEO PART

TKANSISTOR:SILICON NPN

TRANSISTOR: SILICON PNP

TRANSISTOR:SILICON PNP

R:FXO MET FLM 464K OHM 1% l/8W

R:FXO COMP 1 MEGOHM 5% l/2W

R:FXD MET FLM 3L.6K OHM 1% l/8W

NOT ASSIGNEO

R:FXO MET FLM 31.6K OHM 1% l/8W

R:FXO MET FLM 31.6K OHM 1% l/8W

# See introduction to this section for ordering information

6-2

Model 432A

Note

klR38

4LR39

41R40

klR41

klR42 klR43

41 illAl

A1R17

A1R18

A1R19

A1R20

A1R21

&lR22

&LR23 blR24 hAR25 klR26

&lRZ7

tIlR213

klR29

A1R30

A1R31

&lR32 kLR33 iilR34 fIlR35 filR36 klR37

A1R7 itlRO

A1R9

AIRIO

AIR1l

A1R12

A1R13

A1R14

AIR15

A1R16

Model 432A

Reference

@ Part No.

Table 6-1. Reference Designation Index (Cont‘d)

I

Description #

0698-3156

0757-0465

0698-3136

0698-3441

0757-0416

2100-1770

0757-046L

0811-2284

2100-1770

0811–2284

0757–0199

0698-3441

0698-3160

0698-3160

0698–3156

0757–0465

0757-0416

0757-0461

0811-2284

0757-C199

0811-2284

0757-0199

0698-3260

0757-0465

0757–0465

0757-0442

0757-0279

0757-0279

0757-0279

0757-0279

0698-3160

0698-3160

0757-0442

0360-0124

00432-6011

R:FXD MET FLM 14.7K OHM 1% l/8W

R:FXO MET FLM 100K OHM 1X l/SH

R:FXO MET FLM 17.8K OHM 1X l/8W

R:FXO MET FLM 215 OHM 1X l/8W

R:FXO MET FLM 511 OHM 1% l/8W

R:VAR WW 100 OHM 10% LIN l/2W

R:FXO MET FLM 68.lK OHM 1X l/8H

R:FXD WW lK OHM 0.1% l/40W

R:VAR WW 100 OHM 10% LIN l/2kl

R:FXD WH lK OHM 0.1% l/40W

R:FXO MET FLM 21.5K OHM 1% l/8W

NOT ASSIGNEO

R:FXO MET FLM 215 OHM 1% l/8W

R:FXO MET FLM 31.6K OHM 1% l/8W

R:FXD MET FLM 31.6K OHM 1X l/8M

R:FXD MET FLM 14.7K OHM 1% l/8W

R:FXD MET FLM LOOK OHM 1% l/8W

K:FXO MET FLM 511 OHM 1X l/8W

NOT ASSIGNED

R:FXD MET FLM 68.IK OHM 1% l/81i

R:FXO WW lK OHM 0.1% l/40W

K:FXO MET FLM 21.5K OHM 1% l/8W

R:FXD WW lK OHM 0.1% l/40W

R:FXD MET FLM 21.5K OHM 1% l/8W

R:FXO MET FLM 464K OHM 1X l/8W

NOT ASSIGNEO

R:FXD MET FLM 100K OHM 1% l/8W

R:FXD MET FLM 100K OHM 1% l/8H

R:FXO MET FLM 10.OK OHM 1% l/8H

R:FXO MET FLil 3.16K OHM 1% l/8W

R:FXO MET FLM 3.16K OHM 1% l/8kJ k:FXD MET FLM 3.16K OHM 1% l/8H

R:FXO MET FLM 3.16K OHM 1% l/8W

R:FXO MET FLfl 3L.6K OHM 1% l/SW

R:FXO MET FLPl 31.6K OHM 1X l/8W

N(IT ASSIGNED

R:FXO MET FLM LO.DK OHM 1% l/8W

TERMINAL:SOLDER LUG

ASSY:AUTO ZERO

Section VI

Parts

I

Note

# See introduction to this section for ordering information

6-3

Section VI

Parts

Reference

Designation

@ Part No.

Table 6-1. Reference Designation Index (Cont’d)

Description #

/42

A2C1

A2C2

A2C3

A2C4

A2C5

A2C6-

A2C20

A2C3 1

A2C32

A2C33

A2C34

A2C35

A2C36

A2C37

A2C38

A2C39

A2C40

A2C21

A2C22

A2C23

A2C24

A2C25

A2C26

A2C 27

A2C28

A2C29

A2C3C

A2C41

A2C42

A2C43

A2C44

A2C45

A2C46

A2C47

A2C48

A2C49

A2C50

A2CR 1

A2CR2

A2CR 3

A2CR4

A2CR5

00432–6015

00432 -2u15

01 S0-1819

0180-0229

0160-2917

0160–2917

0140–0234

0140–0234

0180-1746

0160–0978

0160-2930

0180–2178

0160-2930

01s0-1940

0180-0197

0160–2672

0180-0197

0160-2917

0160-2917

0160-2150

0180-0229

0160-2917

0180–0106

01s0-0197

0180-0291

0180-0106

0150-0059

0160-2930

0140–0192

0180–0229

0160-2917

1901-0026

1901-0026

1901–0026

1901–0026

BOARO AS SY: LOGIC

BOAR D: BLANK PC

L:FXD ELECT 100 UF +75-10% 50VOCW

C:FXD ELECT 33 UF 10% 10VDCW

C:FXD CER 0.05 UF +80-20% 100VDCW

NUT ASSIGNEO

C:FXD CER. 0.05 UF +80-20% 100VDCW

NOT ASSIGNED

NOT ASSIGNEO

L:FXO MICA 500 PF 1%

C:FXD MICA 500 PF 1%

L:FXO ELECT 15 UF 10% 20VDCW

NiJT ASSIGNED

(,:FXD MICA 150J PF 1% 500VDCW

C:FXD CER 0.01 UF +80-20% 100VDCW

NOT ASSIGNED l\OT ASSIGNEO

C:FXO ELECT 220 UF 20% 8VOCW

L:FXD CER 0.01 UF +80-20% 100VDCW

L:FXD ELECT 33 UF 10% 15VOCW

NOT ASSIGNED

(,:FXO ELECT 2.2 UF 10% 20VDCW

L:FXO MY 0.047 UF 5.%’ 80VOCH

C:FXO ELECT 2.2 UF 10% 20VDCW

C:FXD CER 0.05 UF +80–20% 100VDCW

NUT ASSIGNED

C:FXD CER 0.05 UF +80-20% 100VDCW

L.:FXO MICA 33 PF 5%

C:FXD ELECT 33 UF 10Z 10VDCW

C:FXD CER 0.05 UF +80-20% 100VOCW

C:FXD ELECT 60 UF 20% 6VDCW

C:FXD ELECT 2.2 UF 10% 20VOCW

C:FXD ELECT

1.0 UF 10% 35VDCW

C:FXD ELECT 60 UF 20% 6VDCW

C.:FXD CER 3.3-0.25 PF 500VDCW

C:FXD CER 0.01 UF +80-20% 100VDCW

C:FXD MICA 68 PF 5%

L:FXD ELECT 33 UF 10% 10VDCW

C:FXD CER 0.05 UF +80-20% 100VDCW

LIIOOE:SILICON 0.75A 200 PIV

D1ODE:S1LICON 0.75A 200 PIV

DIDDE:SILICON 0.75A 200 PIV

OIOOE:SILICON 0.75A 200 PIV

N O T A S S I G N E D

# See introduction to this section for ordering information

6-4

Model 432A

Note

Model 432A

Reference

Designation

@ Part No.

Table 6-1. Reference Designation Index (Cont’d)

Description #

A2CR6

A2CR7

A2CRI?

A2CR9

A2LR1O

A2CUll

A2c R12

A2CR13

A2CR14

A2cR15

A2C. R16

A2CR17

A2CR18

A2CR19

A2CR 20

A2CR21

A2CR22

A2CR23

A2Q1

A2Q2C

A2Q2 1

A2Q22

A2Q22

A2Q24

A2Q25

A2Q26

A2Q27

A2Q28

A2Q29

A2Q3 O

A2Q31

F12Q32

AZQ33

!%2Q34 h2C35

&2Q36

A2Q2

A2Q 3

A2 C14

AZQ5

A2Q6

A2Q7

A2Q8

A2Q9

A2Q1O

A2C?11

A2Q12-

AZ f.i19

1902-0033

1901–004U

1901–0026

1901–0040

1901-0040

1901-0040

190 I–004L)

1901-0040

1901–0040

1901–0040

L901–004U

1901-0040

1901-0040

1901-0040

1901–0040

1901-0040 lS54–007i

1854–0062

1854-0071

1853-0012

1853–OOfO

1S53–0020

1853–0020

1854-0071

1854–0003

1853-0001

1854-0071

1853-0020

1854-0005

1854–0071

1854-0071

1854-0005

1854–007A

1854–0071

1854-CD09

1854–0009

1855-0062

1S55-0062

1854–0071

1854-0071

1853-0015

DIODE SREAKDOWN:6.2V

tiIcIi7E:sILxc0N

DIOOE:SILICON

30MA 30WV

0.75A 200 PIV

NOT ASSIGNED

NGT ASSIGNEO

DXODE:SILICON

OIGDE:SILICON

L)IOOE:SILICON

DIODE:SILICON

DIODE:SILICON

30MA 30WV

30MA 30WV

30MA 30WV

30MA 30WV

30MA 30WV

I)1OOE:SILICON

OIODE:SILICON

DIODE:SILICON i2100E:SILICON

DIODE:SILICON

30MA 30WV

30MA 30WV

30MA 30WV

30MA 30WV

30MA 30WV

D1ODE:SILICDN

DIOOE:SILICON

OIOOE:SILICON

30MA 30WV

30MA 30WV

30MA 30WV

TRANSISTOR: SILICON NPN

TRANSISTOR:SILICON NPN 2N1701

TKANSISTOR:SILICON NPN

TRANSISTOR:PNP SILICON 2N2904A

TRANS1ST13R: S1LICON PNP

TRANSISTOR:SILICON PNP

TRANSISTOR: SI’LICON PNP

TRANSISTOR: SILICON NPN

TKANSISTOR:NPN SILICON

TRANSISTOR:PNP SILICON 30V 900MW

TRANSISTOR: SILICON NPN

NOT ASSIGNEO

NUT ASSIGNED

TRANSISTCIR:SILICON PNP

TRANSISTOR:SILICON NPN 2N708

TKANSISTOR:SILICON NPN

TRANSISTDR:SILICON NPN

TRANSISTLJR:SILICON NPN 2N708

NOT ASSIGNED

TRANSISTO17:SILICON NPN

TRANSISTLIR:SILICON NPN

TRANSISTOR:SILICDN NPN 2N709

TKANSISTOR:SILICON NPN 2N709

TRANSIS,TOR: FIELD EFFECT 30V

NOT ASSIGNED

TRANSISTOR:FIELD EFFECT 30V

NOT ASSIGNED

TRANSISTOR: SILICON NPN

TRANSISTOR:SILICON NPN

TRANSISTOR: SILICON PNP 2N3640

# See introduction to this section for ordering information

Section VI

Parts

Note

6-5

Section VI

Parts

Reference

Designation

@ Part No.

Table 6-1. Reference Designation Index (Cont’d)

Description #

A2Q37

A2Q38

A2Q39

A2Q40

A2Q4 1

A2Q42

A2f.)43

A2Q44

A2Rl

A2R.?

A2R3

A2R4

A2R5

A2R6

A2R7

A2R8

A2R9

A2R1O

A2R11

A2R12

A2R1?

A2R14

A2R15

A2R16

A2R17

A2R18

A2R 19

A2R20

A2R21

A2R22

A2R23

A2R24

A2R25

A2R26

42R27 i2R28

42R29 ti2R30

\2R31

\2R32 i2R33 i2R34

42R35

\2R36–

42R37

$2R38 i2R39

42R40

42R41

1853-0020

1855-0062

1854–0071

1854-0071

1853-00.0

1853-0020

1854-0071

1854-0071

07’57-0279

0683-0685

0757-C835

0698-3156

2100-1773

0757-0289

0757–0260

0698-3160

0698-3441

0757–0465

0757–0442

0698-3136

0757–0442

0757–0279

0757–0198

0698-340L

0698–3156

0757–0442

0757-0442

0698-3260

0698-3260

0757-044A

0757–0442

0698-3156

0757-0397

0757-o199

0757-0442

075_/-04b5

0698-3454

0757-0465

069S-3155

0698-3155

0757-0465

TRANSISTOR: SILICON PNP

TRANSIST(IR:FIELO EFFECT 30V

Transistor: SILICON NPN

TKANSISTOR:SILICON NPN

TRANSISTLIR:SILICON PNP

TRANSISTOR:SILICON PNP

Transistor: SILICON NPN

TRANSISTUR:SILICON NPN

R:FXO MET FLM 3.16K OHM

1%

l/8W

R:FXO COMP 6.8 OHM 5% l/4W

R:FXD MET FLM 6.81K OHM 1%’ l/2W

NuT ASSIGNEO

R:FXO MET FLM 14.7K OHM 1% l/8W

R:VAR WW lK

OHM 10% LIN l/2W

R:FXO MET FLM 13.3K OHM 1% l/8W

R:FXO MET FLM lK OHM 1% l/8W

R:FXO MET FLM 31.6K OHM 1% l/8W

R:FXO MET FLM 215 OHM

1% l/8W

FACTORY SELECTEO PART

K:FXO MET FLM 100K OHM 1% l/8W k:FXO MET FLM 10.OK

OHM 1% l/8W

R:FXO MET FLM 17.8K OHM 1% l/8W

NLJT ASSIGNEO

R:FXII MET FLM

10.OK

OHM 1% l/8W

R:FXO MET FLM 3.16K OHM 1% l/8W

R:FXO MET FLM 100 OHM 1% l/2W

K:FXO MET FLM 215 OHM 1% l/2W

NUT ASSIGNEO

NOT ASSIGNEO

R:FXD MET FLM 14.7K OHM 1!4 l/8W

R:FXD MET FLM 10.OK OHM 1% l/8W

R:FXO MET FLM

10.OK

OHM

1% l/8W

R:FXO MET FLM 464K OHM 1% l/8W

R:FXO MET FLM 464K OHM 1’% l/8W

R:FXO MET FLM

19.OK

OHM 1% l/8N

R:FXO MET FLM

10.OK

OHM 1% l/8W

R:FXO MET FLM 14.7K OHM 1% l/8W

R:FXO MET FLM 68.1 OHM 1% l/8W

NOT ASSIGNED

N(IT ASSIGNEO

R:FXO MET FLM 21.5K OHM 1% l/8w

R:FXO MET FLM 10.OK

OHM 1% l/8W

R:FXO MET FLM 100K OHM 1% l/8W

R:FXO MET FLM 215K OHM 1% l/8W

NOT ASSIGNEO

NOT ASSIGNEO

R:FXO MET FLM

100K

OHM 1% l/8W

R:FXO MET FLM 4.64K OHM 1% l/8W

R:FXO MET FLM 4.64K OHM 1% l/8W

R:FXO MET FLM

100K

OHM 1% l/8W

# See introduction to this section for ordering information

6-6

Model 432A

Note

Model 432A

Reference

Desigrmtlon

@ Part No.

Table 6-1. Reference Designation Index (Cont'd)

Description # k2R55 k2R56 i2R69

$2R70

\2R71

&2R72 i2R73

G2R74 i2R75

\2R76 i2R77 h2R?8

42R57

&2R58 k2R59 k2R6Q k2R61 k2K6Z ti2R63

+ZR64 k2R65

$ZR66

$2R67

$2R68

A2R42

A2R43

A2R44–

&2Fi45

&2R46

AZR47 k2P+4a-

A2R4%

I$2R50

A2R!31

h2R52

A2R53 k2R54 k2R79

L2R80

L2R81–

L2R82

,2RS3 i2R84-

(2R86

L2R8 7

0683-1065

075-I -l L194

0757

-04b5

0683-1065

0757–0280

Ob98-32b0

0757–0279

069S–31b0

0698-3426

0698-316Q

0757–(3442

Ob98-326C)

0698-3260

0698-0084

06$33-1055

0757–0639

0757-0442

Ci757-0461

Ob98–31b0

0157-0442

069S-3438

0698-31b0

0698-3444

0757-0199

2100-1769

0698–4466

0757–0346

0698-3160

0811–22?7

0811–2277

0811–2537

0698-3441

0683-1065

0360-0124

0370-0077

R:FXD COMP 10M OHM 5X 1/4ki

R:FXD MET FLM 1.47K OtiM 1% L18W

NOT ASSIGNEO

NOT ASSIGNED

F.:FXO MET FLM

100K

OHM 1% l/SW

J?:FXO COMP

10M

OHM 5% l/4W

MIT ASSIGNEO

NOT ASSIGNEO

R:FXD MET FLM

lK

OHM 1% l/8W

R:FXD MET FLM 4b4K OHM @ l/8H

R:FXD MET FLM 3.16K OHM 1% 1/13W

R:FXD MET FLM 31.6K OHM 1% l/8W

R:FXD MET FLM 14.7 OHM 1% L/8M

FACTORY SELECTEO PART

R:FXO MET FLM 31.6K OHM 1% L/SW

FACTURY SELECTEO PART

NuT ASSIGNEO

R:FXD MET FLM 10.OK OHM 1% l/8W

R:FXD MET FLH 464K,0HM 1% l/8W

R:FXD MET FLM 464K OHM 1% l/8W

R:FXD MET FLM 2.15K OHM 1% l/8N

R:FXD COMP 1 MEGOHM 5% l/4W

NOT ASSIGNEO

NOT ASSIGNEO

R:FXL) MET FLM

b.SIK

OHM 1% l/8M

R:FXD

MET FLM

10.OK OHM lx l/8H

R:FXD MET FLM 68.IK OHM 1% l/8H

K:FXD MET FLM 31.bK OHM 1% l/8W

R:FxO t4ET FLM 10.OK OHM Iz l/8w

R:FXD MET FLM 147 OHM 1% l/8w

NUT ASSIGNED

R:FXCl MET FLM 31.6K OHM 1% l/8W

R:FXO MET FLM 316 OHM

1% l/SW

R:FXD MET FLM 21.5K OHM

1% l/8W

li:VAR WW 50 OHM 10% LIN l/2W

R:FXO

MET FLM 976 OHM 1% l/8W

R:FXO MET FLM

10

OHM

1%

l/8H

R:FXO MET FLM 31.6K OHM 1% l/8W

R:FXO WW

10K

OHM 0.1% l/40W

R:FXD WW 10K OHM 0.1% l/40W

R:FXD WW 5K OHM 0.1% l/4W

NOT ASSIGNEO

NUT ASSIGNEO k:FXO MET FLM 215 OHM

NUT ASSIGNEO

NUT ASSIGNED

1% l/8H

A:FXD COMP

10M

OHM 5Z l/4w

TtRMINAL:SOLOER

LUG

KNOB:5/8° SKIRTED BAR

# See introduction to this section for ordering information

Section VI

Part s

Note

I

— ,

6-7

BT

1

BT1

BT 1

cl

6-8

Section VI

Parts

A5

A6

A7

A7C1

A7CR 1

A7CR2

A7Q 1

A7Q2

A7Q3

A7Q4

A7R 1

A7R2

A7R3

A7R4

A7R5

A7R6

A7R 7

A7R8

Reference

Designation

A3

A3R1

A3R2

A3R3

A3R4

A3S1

A4

A4R1

A4R 2

A4R 3

A4R4

A4R 5

A4R6

A4R 7

A4R8

A4R 9

A4R 10

A4R11

A4R 12

A4R13

A4S1

00432-6007

00432-2007

0160-2930

1901-0026

1902–0048

1854–0039

1853-0020

1854-0071

1854-0071

0698–3635

0757–0280

0757-0346

0757–0439

0757–0280

0757–o199

0757-0199

2100-1775

@ Part No.

00432-6003

0811-2536

0811-2284

0811-2534

0811-2535

3100-2470

00432-6004

0757–0346

0757–0346

0757-0346

0757-0346

0757-0346

0757-0346

0757-0346

0757-0346

071i7-034b

0757–C346

0757-0346

0757-0346

0698–6635

3100–2469

0370–0193

Table 6-1. Reference Designation Index (Cont’d)

Description #

SWITCH ASSY: RANGE

R:FXD WW 3167 OHM 0.1% l/40W

R:FXD WW IK OHM 0.1% l/40w

R:FXD WW 314.3 OHM 0.1% l/40W

R:FXD WW 145.0 OHM 0.1% l/40W

SWITCH:ROTARY

SWITCH ASSY: CALIBRATION FACTOR

R:FXD MET FLM

10 OHM 1% l/8W

R:FXO MET FLM

K:FXD MET FLM

R:FXD MET FLM

R:FXD MET FLM

R:FXO MET FLM

10

OHM 1% l/8W

10 DHM 1% l/8W

10 OHM 1% l/8W

10 OHM 1% l/SW

10 OHM 1% l/8W

R:FXD MET FLM

R:FXD MET FLM

R:FXD MET FLM

R:FXD MET FLM

R:FXII MET FLM

10 OHM 1% l/8W

13 OHM 1% l/SW

13 OHM 17, l/8ki

10 OHM 1% l/8W

10 OHM 1% l/8W

R:FXD MET FLM t7:FXD MET FLM

10 OHM 1% l/8W

680 OHM 1% l/8W

SMITCH:RIJTARY

KNOB:BLACK

NOT ASSIGNED

NUT ASSIGNED

BuARO ASSY:BATTERY CHARGER

B(JARD:8LANK Pc

C:FXD CER 0.01 UF +00-20% 100VDCW

DIOOE:SILICON 0.75A 200 PIV

OIOOE 8REAKDOWN:6.81V 5%

TRANSISTOR: SILICON 2N3053

TRANSISTOR:SILICON PNP

TRANSISTOR:SILICON NPN

TRANSISTOR:SILICON NPN

R:FXD MET OX 680 OHM 5% 2W

R:FXD MET FLM lK OHM 1% l/8W

R:FXD MET FLM

10 OHM 1% l/8W

R:FXO MET FLM 6.81K OHM 1’% l/8W k:FXO MET FLM lK OHM 1% l/8W

R:FXD MET FLM 21.5K OHM 1% l/8H

R:FXO MET FLM 21.5K OHM 1% l/8W

R:VAR WW 5K OHM

10% LIN l/2W

1420-0062

00432-0008

00432-0009

BATTERY:RECHARGEABLE 24V

BRACKET:BATTERY UPPER

BRACKET:BATTERY LOWER

0160-3043 C:FXO CER 2 X 0.005 UF 20% 250VAC

# See introduction to this section for ordering information

Model 432A

Note

Model 432A

Reference

Designation

@ Part No.

Table 6-1. Reference Designation Index (Cont’d)

Description #

T1

T1

WI

W2

S2

S2

53

S3

S3

S3

S4

S4

R7

R8

R9

RIO-

R13

R14

S1

SL

XA 1

XA1

XA 2

XDS1

XDS 1

Ml

Rl

R1

R2

R3

R4

R5

R6

XF 1

12sl

F1

Jl

J2

J2

.13

J3

J4

J4

J5

2140-0015

2110-0027

1251-1280

1250-0118

1250-0118

1250–olia

1251-0148

1120-1497

2100-2849

2100-2659

0S11-2548

0811-2548

0811-2538

0811–2538

0757–oi98

0757-0198

0757-0195

069B–3160

0811-2277

3101-0957

3101-0033

3101-1180

7204-OOLl+

0590-00+1

3101–1357

LA MP:GLOW NEON NE– ZH

FUSE: O. 125A 250V

CONNECTOR:AUOIO 6 FEMALE CONTACTS

CONNECTOR:BNC

V-RF

LONNECTOR:BNC

V-COMP

LilNNECTUR:BNC

RECORDER OUT

LONNECTUR:POWER 3 PIN MALE

METER

R:VAR WW 50K OHM 5% LIN l-1/2W(SERIAL PREFIX 904)

K:VAR WW 50K OHM 5% LIN l-1/2W(SERIAL PREFIX 919)

K:FxD WW 100 OHM 0.1% l/10W

R:FXD WW

100 OHM 0.1% l/10W

R:FXO WW 100 OHM 0.1%’ l/10W

R:FXO WW 100 OHM 0.1% l/10U

R:FXCI MET FLM 100 OHM 1X l/2W

K:FXO MET FLM 100 CIHM 1% l/2W

R:Fxo MET FLM 100 OHM 1% l/i!W

R:FXO MET FLM 3L.6K OHM 1% l/8W

NUT ASS.IGNEO

NOT ASSIGNEO

R:FXD WW 10K OHM 0.1% l/40W

SWITCH:TOGGLE DPOT

POWER

SdITCH:SLIOE DPOT 0.5A 125V AC/DC

(l15V/230V OPERATION)

SUITLH:SLIOE 3POT

MOUN”[ RESISTANCE

ALUMINUM:SHEET 0.063 THICK

NUT:KNURLEO 1-72 THREAD

SWITCH:TOGGLE SPDT

(FINE 2ERO)

9100-2504

00432-0005

8120-1082

8120–0078

1251-0172

1251-0172

5040–02>7

504G-0235

,

TRANSFORMER:28.4V SEC.

8RACKET: TRANSFORMER

CABLE ASSY:5 FT

CABLE ASSY:POHER CORO

CUNNECTOR:PRINTEO CIRCUIT 22-CONN

IPART OF 00432–0006 DECK LOWER)

CC)NNECTOR:PRINTED CIRCUIT 22-CONN

LAMPHOLOER

BASE:LAMPHOLOER

1400-0084 FUSEHCILOER: EXTRACTOR POST TYPE

# See introduction to this section for ordering information

Section VI

Parts

Note

6-9

Section

VI

Parts

Reference

Designation

@ Part No.

Table 6-1. Reference Designation Index (Cont’d)

Description #

0403-0005

5020-0704

5040–0700

5040-0702

504G–45zd bUMPER: BLACK RUBBER

METER TRIM: THIRD MOO.

HINGE lNSULATOR:CONNECTOR

LWIOE:PC BOARDIGRAY PLASTIC)

00432-2003

00432-2004

00432-2005

NIJT:ORkSS

BUSHING:PANEL

NUT:CONNECTOR

Model 432A

Note

6-10

# See introduction to this section for ordering information

Model 432A

Table 6-1. Reference Designation Index (Cont'd)

Section VI

Parts

# See introduction to this section for ordering information

6-11

0140-0192

0140-0234

0150-0059

0160-0380

0160-0978

0160–2150

0160-2264

0160-2672

0160-2917

0160-2930

0160-3043

0180-0106

0180-0197

0180-0229

0180-0291

0180-0374

0180-1746

0180-1819

0180-1940

0180-2178

0360-0124

0370-0077

0370-0193

0403-0005

0590-0041

0683-0685

0683-1055

0683–1065

0686–1055

0698-0084

0698-3136

0698–3155

0698-3156

0698-3160

0698–3260

0698-3401

0698-3428

0698-3438

0698-3441

0698–3444

0698-3454

0698–3635

0698-4466

0698-6635

0757-0198

0757-0199

0757-0279

0757-0280

0757-0289

0757-0346

0757-0397

0757-0416

0757-0439

0757–0442

Section VI

Parts

@ Part No.

Table 6-2.

Replaceable Parts

Description #

Model 432A

Mfr.

Mfr. Part No.

TQ

C:FXD MICA 68 PF 5%

C:FXD MICA 5(JO PF 1%

C:FXD CER 3.3-LI.25 PF 500VDCW

C:FXD MY 0.2Z UF 10% 200VOCW

C:FXO MICA 15011

PF 1% 500VOCW

C:FXD MICA 33

PF 5%

C:FXD CER 20 PF 5X 500VOCW

C:FXD MY 0.047 UF 5% 80VOCM

C:FXD CER 0.05 UF +80-20’% 100VDCW

C:FXD CER 0.01 UF +80-20% 100VDCW

C:FXD CER .2 X 0.005 UF 20% 250VAC

C:FXD ELECT 60 UF 20% 6VOCW

C:FXO ELELT 2.2

UF

10% 20VOCW

C:FXO ELECT 33 UF 10% 10VDCW

C:FXO ELECT

1.U

UF 10% 35VOCW

C:FXO ELECT 10 UF 10% 20VDCW

C:FXO ELECT 15 UF 10% 20VDCW

C:FXO ELECT 100 UF +75-10% 50VOCW

C:FXO ELECT 33 UF 10% 15VDCW

C:FXD ELECT 220 UF 20% 8VOCW

TERMINAL:SDLDER LUG

KNOB:>/8 SK bAR

KN08:BLACK

BUMPER:BLACK RUBBER

NUT:KNURLED 1-7.2 THREAD

R:FXD LOMP 6.8 OHM 5% l/4W

R:FxD COMP 1 MEGOHM 5% l/4W

R:FxD COMP 10M OHM 5?4 l/4w

R:FxO COMP 1 MEGDHM 5% l/2W

R:FXD MET FLM 2.15K OHM 1% l/8W

R:FXD MET FLM 17.8K OHM 1% l/8W

R:FXD MET FLM 4.64K OHM 1% l/8W

R:FXO MET FLM 14.7K OHM 1% l/8W

R:FXD MET FLM 31.6K OHM 1% l/8W

R:FXD MET FLM 464K OHM 1% l/8W

R:FXD MET FLM 215 OHM 1% l/2W

R:FXD MET FLM 14.7 OHM 1% l/8W

R:FXO 14tT FLM 147 OHM 1% l/8W

R:FXO MET FLM 215 OHM 1% l/8W

R:FXD MET FLM 316 OHM 1% l/8W

R:FXD MET FLM ,?15K OHM 1’z l/8W

R:FXD MET lJX 680 OHM 5% 2W

R:FXO MET FLM 976 OHM 1X l/8W

R:FXD MET FLM 880 OHM 1%? l/8W

R:FXO MET FLM 100 OHM 1% l/2W

R:FXD MET FLM 21.5K OHM

1% l/13W

R:FXD MET FLM 3.16K

OHM 1% l/8W

R:FXO MET FLM

lK

OHM 1% l/8W

R:FXD MET FLM 13.3K OHM 1% l/8W

R:FXD MET FLM 10 OHM 1% l/8W

R:FXD MET FLM 68.1 OHM 1% l/8W

R:FXO MET FLM 511 OHM 1% l/8w

R:FXD MET FLM 6.81K OHM 1% l/8W

R:FXD MET FLM

10.OK OHM 1% l/8W

# See introduction to this section for ordering information

28480

28480

72982

28480

28480

0140-0192

0140–0234

301-OOO–COJO-339C

0160-0380

0160-0978

28480

72982

28480

84411

91418

56209

28480

28480

28480

28480

0160-2150

301-000–COGD-200J

0160-2672

TYPE TA

TA

29C147A-CDH

0180-0106

0180-0197

0180-0229

0180-0291

28480

28480

28480

56289

56289

0180-0374

0180–1746

01S0-1819

109D336X9O15C2-DYP

109D227XOOO8F2–DYP

28480

28480

28480

70485

28480

0360–0124

0370-0077

0370–0193

#lo59

0590-0041

01121

01121

01121

01121

28480

CB68G5

CB 1055

CB 1065

E8 1055

0698-0084

28480

28480

28480

28480

28480

0698–3136

0698–3155

0698-3156

0698-3160

0698-3260

2B480

28480

28480

28480

28480

0698-3401

0698–3428

0698-3438

0698-3441

0698–3444

28480

28480

28480

28480

28480

0698-3454

0698-3635

0698-4466

0698–6635

0757-0198

28480

28480

28480

28480

28480

2 8480

2 8480

28480

2 8480

0757–0199

0757-0279

0757-0280

0757–0289

0757–0346

0757-0397

0757-0416

0757-0439

0757-0442

1

1

1

1

4

1

4

1

1

1

5

14

7

2

2

17

1

1

1

1

1

1

2

1

1

3

1

1

1

1

1

2

2

12

7

1

14

7

4

1

2

1

b

12

3

3

1

1

2

1

2

1

2

1

6-12

Model 432A

Table 6-2.

Replaceable Parts

Description #

(Cont’d)

Mfr. Part No.

Section VI

Parts

TQ

[

@ Part No.

1855-0G62

1901-0026

1901-0040

1902-0033

190Z-C048

2100-1769

2100-1770

2100-1773

2100–1775

2100-2659

2100-2849

2110–0027

2140-0015

31OG-2469

3100-2470

3101-0033

3101-0957

3101-1180

3101–1357

5000-0703

5000-0711

5020-0704

5040–0235

504fJ-C257

5040-C700

I

0?57-0461

0757-0465

0757-0835

0757-1094

0s11–2277

‘0811–2284

0811-2534

0811-2535

0S11-2536

0S11–2537

0811-2538

1120–1497

1250-0118

1251-0148

1251-0172

1251-1280

1400-0084

1420-0062

1490–0031

1s53–0001

1853-0012

1853-0015

1853-0020

1854-0003

1854–0005

1854-0009

1854-L’039

1854-0062

1854-0071

1854–0221

R:FXD MET FLM 68.lK OHM lZ l/SW

R:FXD MtT FLM 100K OHM 1% l/8W

R:FXD MET FLM 6.81K OHM 1% l/2W

R:FXD HET FLH 1.47K OHM 1% l/SW

R:FXO WW 10K OHM 0.1% l/40H

R:FXD WW lK OHM 0.1% l/40W

R:FXD HW 314.3 OHM O.lZ l/40W

R:FXO WU 145.0 OHM O.lX l/40W

R:FXD UN 3167 OHM 0.1% l/40W

R:FXD WM 5K LIHM 0.1% l/4W

R:FXO HW 100 OHM 0.1%

l/10W

METER

CONNECTtiR:BNL

CONNECTLIR:POhER 3 PIN MALE

CDNNECTOR:PRINTEO CIRCUIT 22-CONN

CONNECTfJR:AUDILl 6 FEMALE CONTACTS

FUSEHOLDER:tXTRACTOR POST TYPE

8ATTERY:RECHARGEA8LE 24V

STANO:TILT

TRANSiSTUR:PNP SILICON 30V 900MW

TRANSiSTCiR:PNP SILICON 2N2904A

TRANSISTOR:SILI(.ON PNP 2N3640

TRANSISTOR:SILICON PNP

TRANSISTOR:NPN SILICON

TRANSISTOU:SILICON NPN 2N708

TRANSISTOR:SILICON NPN 2N709

TRANSISTL)K:SILICL)N 2N3053

TRANSISTL)R:SILICON NPN 2N1701

TRANSISTOR:SILICON NPN

TRANSISTOR OUAL:SILICON NPN

TRANSISTOK:FIELD EFFECT 30V

DIODE:SILICUN C1.75A 200 PIV

DIODE:SILICUN 30MA 30WV

DIOOE LWEAKLM3WN:6.2V

OIODE SREAKLMJWN:6.81V 5%

R:VAR Wki 50 OHM 10% LIN l/2W

R:VAR WW 100 OHM 10% LIN l/2W

R:VAR Wti lK OHM 10% LIN l/2W

R:VAR WW 5K OHM 10!Z LIN l/2W

R:VAR Wti 50K OHM 5% LIN l-1/2W

R:VAR WW 50K OHM 5% LIN l-1/2W

FUSE:O.125A 250V

LAMP:GLOW NEON NE-2H.

SWITCH:R13TAllY

SUITCH:RLITARY

SWITCH:>LIL)E dPDT 0.5A 125V AC/OC

SWITCH:TL)GGLE LIPOT

SWITCH:SLIOE 3PDT

SWITCH:TOGGLE SPOT

SIOE LUVER

COVER:BLIT1”OM

METER TRIM:THIRIJ MOD.

BASE:LAMPHllLOkR

LAMPHOLLIkR

HINGE

2S480

28480

2S480

28480

28480

0757-0461

0757–0465

0757–0s35

0757–lo94

0811-2277

2S480

28480

28480

2S480

2S480

0811-2284

0S11–2534

0811-2535

0811–2536

0811–2537

2S480

28480

2S4S0

87930

28480

284S0

79515

2S480

28480

28480

0811-2538

1120–1497

1250-011S

1065–1

1251–0172

1251–12S0

342014

1420-0062

1490-0031

1853-0001

04713

2S480

2S480

2S480

02735

07263

02735

02735

284S0

28480

2N2904A

1853-0015

1S53-0020

1854-0003

2N708

2N709

2N3053

2N1701

1854-0071

1854-0221

28480

2S480

28480

04713

28480

1S55–0062

1901-0026

1901-0040

1N823

1902–004S

28480

2S480

28480

2S480

28480

28480

75915

24455

28480

28480

79727

2100–1769

2100-1770

2100-1773

2100-1775

2100-2659

2100-2849

312.125

NE 2H

3100–2469

31OL)-247O.

G326–0001

28480

82389

09353

2S480

28480

3101–0957 llL–1020

7109

5000-0703

5ooo–c171i

28480

28480

28480

28480

5020-0704

5040-0235

5040-0257

5040-0700

# See introduction to this section for ordering information

1

1

13

1

2

1

22

2

1

2

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

2

6

16

1

1

1

1

1

5

1

3

9

1

1

3

4

1

3

1

2

1

1

1

1

3

1

1 i

1

6-13

Section VI

Parts

@

Part No.

Table 6-2.

Replaceable Parts

Description #

(Cont ‘d)

Mfr.

Mfr. Part No,

Model 432A

TQ

5040-0702

5040-4528

5060-C703

5060-0706

5060-0727

7204-0004

9120-0078

9120-10s2

I1OI.-25O4

10432-0001

)0432-0002

)0432-0005

)0432-0006

10432-0007

)0432-0008

)0432-0009

)0432-2001

)0432-2003

)0432-2004

)0432-2005

)0432-2007

)0432-2015

)0432-6001

)0432-6003

)0432-6004

)0432-6007

)0432-6011

)0432-6015

IN SULATIJR:LUNNECTOR

GUI OE:PL. tNJAKO( GRAY PLASTIC)

FRAME A>SY:b X 11 SM

COVER:TUP

FOOT A5>Y

ALUMINUM:>HEET 0.063 THICK

CABLE AS>Y:PLIidER C.ORO

CABLE ASSY:> FT

TRANSFURMtR:.20.4V SEC.

PANEL:FRUNT

PANEL:RtAt(

BRACKET:TRANSFL)RMER

OECK:LOW&R

OECK:UPPEK

BRACKET:LiATTERY UPPER

BRACKET:13ATTEkY LOWER

BOARO:BLANK PC

NUT:DRE5S

BUSHING:PANEL

NUT:CLINNkt,TUR

BOARO:LiLANK PC

BOARD:BLANK PC

BOARO ASSY:dklLJLE

SWITCH ASSY:RANGE

SWITCH ASSY:CALIBRATION FACTCIR

BOARO ASSY:bATTERY CHARGER

ASSY:AUTU .ZkRu

80ARD ASSY: LOGIC

2S480

284S0

28480

28480

28480

5040-0702

5040-4528

5060-0703

5060–0706

5060-0727

28480

28480

28480

28480

28480

7204-0004

8120-0078

8120-1082

9100-2504

00432-0001

28480

28480

28480

28480

28480

00432-0002

00432-0005

OOft3.2-OOOb

00432-0007

00432-0008

284S0

28480

284S0

28480

28480

00432-0009

00432-2001

00432-2003

00432-2004

00432-2005

28480

28480

28480

28480

28480

00432-2007

00432-2015

00432–6001

00432-6003

00432–6004

28480

28480

28480

00432-6007

00432-6011

00432-6015

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

6-14

# See introduction to this section for ordering information

Model 432A

TABLE 6-3.

CODE LIST OF MANUFACTURERS

The following code numbers are from the Federal Supply Code for Manufacbm’ers Cataloging Handtioks H4- 1

(Name to Code) and H4-2 (Code to Name) and their latest supplements. The tfate of rev,.won and the date of the supplements used appear at the bottom of each p!age. Alphabetical codes have been arbitrarily assigned fm suppliers not appearing in the H4 HancGwoks.

Section VI

Parts

cud.

No. nmvfocturef Address

0130110 U.S.A. Common

00136 MCCOY Electronics

00211 Sake EleG[rumcs Curp

0028? C8JZC8 IRC.

Any supplier of U, S.

Mount Holly SPrlnE$, ?8.

Rochesfe[, N. Y.

Dmlie[sQn, cum,

00334 HumdIal

00348 Ulclotlafi co. , inc,

003/3 Gaflock Inc.

Colhm, Ca[[f.

Valley Stte&n, NY.

0Q656 herovax Corp.

00119 Amp Inc.

Cherly HII[, N.J

New B6df~rd, Mass,

Hafnsbutg, Pa.

007!31 Al fc!aff R8L+<0 CorP Boonton, N.J.

00815 Nnrthzm EnK1fl&lln K Liberator! es,

IUC,

00853 .!angano Electric Co. , PIckens DIV.

8u1Nngt0n, Wls.

00866 Gae En fmertmg Co.

P]ckeos, SC.

City of Industry, Crl.

LOS AngelBs, Cal, f,

00891 Carl E. Holmes carp,

8092! M!crolab inc.

Livlngslon, N.J.

01002 Gsneral Elecfr[c CO.. Capacitor DePi

Hudson Falls, N,Y.

81009 Alden Pfoducts Co.

0112J Al[eo B1adfey L%.

01255 Lfttan Indvslf! es, Inc.

012t I TRW Semtcendvctors, inc.

01295 Texas lnStFUnentS, lfl C,,

TransIs(Qr PrQducls D,V

BCotkk?m, Mass.

MllWaukee, WI%

Beverly Hills, Calsf.

Latmdale, C$lif,

Dallas, Texas

01349 The AilIamce k4ft, Co.

01S89 PacIi[c Relays, IIIC.

Alliance, Ohm van NLWS, Callf.

Rotkfardr III.

01930 Amefeck Carp.

01961 Pulse Engtneel, ng Co.

t2114 Ferfoxcube

corp. at

Amettct

021JS Wheelock SIgnalS,

lllC

Santa Clara, CalIf.

$augerti~s, N. V.

Long %fanch, N,J.

02256 C.ale Rubbe! and PfastI[s inc.

02660 Am Phfmol

2!01s

Eleclfomcs Carp.

SuRny vale, Calif.

Chicago, III.

02735 Rad!o C@fP. of Amierca, Semconducto[ and Ma[ef Ia[s DIV.

Soinerv[lle, N.J.

02??1 Voc%lIne Cn at An!ef!ca, inc.

Old Say bfook, Con”.

02777 H.pk!ns Eng!neermg Co.

San Fe[nando, Cal If.

03508 G. E. Semiconductor Prod. OePf Syracuse, N, V,

03?05 Auex Mach, ne &

T!301

Co.

Dayton, Ohio

037S7 Ela’ema CorP

03877 Tran$ltfnn Electric Cerp

Q3UaB Pyraf81m Res, sto! Co. , lnc d3954 SInKeI CQ,. D,ehl D,”.

Conptan, CalIf.

‘A’akefleldr Mass,

Cedar Knolls, N,J.

Flnde,ne Plant SvmeWllle, N.J.

04D09 Arcow, Ha,t and HetemaII Elect Co.

Hartford, Ccrn D,

04QIJ Tau!us Corp.

040$2 A$cn Electronic NIC,

04?22 HI.Q D!v,saon of AeIvYox

0435b Prec, s!on Papef Tube Co.

Lam bertv,lle, N,).

GIeat Neck, N,Y, k4yft16 Beach, S.C.

Wheeling, III.

04404 Dymec Drv, sIon of Hewlett.Packard Co

Palo Alto, Cslif.

D%51 Sqlvama Electrzc Products, M[cro wave

DeYIce OIV

Mnunlam View, Ca13f.

04?11 tAoturo!8, 10C $em[conduclnr Prod. Dtv.

Phoentx, Amzona

04?32 F,itron Co , inc. Westefn DIV.

Culver C,ty, Cd, f,

No[~hlake, III.

041?3 Au[omal, c Elect,, c Co.

04?96 Seqmola Wife co

04811 Pcmzs[on COII SPfIne

Co

04B7D F fA. Molar Call?pany

Redwood Ctty, CalI1.

El Monte, Cal]f

Westchester, III.

04919 component Mfg. $e$v!ce Co.

W, B!!dgewafef, Mass.

!35006 Twentseth Century Plastics, Inc.

Los Aneele$, Calif.

1352?7 Westinghouse Eleclr[c Corp.

Sem<. C.nd IIcIoI Dept

05347

U!tmnlx, Inc

Y0unew006, Pa.

S.M uateo, Cal, f.

Code

No.

Manufacturer Address

05397 Untbn Calbtde Corp. , Ltnde DIV Kemet Oept.

Cleveland, Dh, o

05593 Illumltmn!c Eng, neeltog Co

05616 Cosmo Plast([

Sunnyvale, Callf.

(C<O

Elecf[tcal

sPtc,

Co. )

05624 8a[bef Colman Co

Cleveland, Oh!o

Rock fo{d, [II

0512S T!lfen Dptl, a[ Co

Roslyn He!ghts, Long Island, N.Y.

05129 M6t!oTef

~OIP

05?S3 Stewart Eog[neert”g Co

Westbury, N.Y.

Sanfa Cruz, Calif,

05820 Wake f!eld EnEIneerInK

IRC

Wake field, Mass.

06004 Ba$.s!ck Co , D,v ot Slewa[[ Warner

COIP,

OtPO$U Raychem COIP

06)?5 Bausch and Lomb Optical Co

8rldgeport, Corm

Redwood C,fy, Cal!f.

Rocheste!, N. Y

06402 E. T. A. Products Co of Ame[{ca

06540 Amatam Electmn8c Hardware Co , I“C.

Ch, cage, III.

New Rochelle, N.Y,

06515 Beede Electrical Instrument Co , lnc,

06666 Genelal Devices Co Inc.

06751 Sem COl OIV. Components Inc.

Penacmak, N, H,

Ind, anapolls, Ind

Phoen ,x, Anz.

06812 ToIIIoKton Mfg Co. , West DIV.

06980 VaIIan ASSOC. Etmac D!,,

07088 Kelvin Electric CO,

07126 D,g, tran Co

Van Nuys, Caltf

San Callos, Cal Cf.

Van NUYS, Cal If.

Pasadena, Cal If.

Mlnne apolls, Mlnn.

0713? T1ansIs lOi Electronics COIP.

011.38

Wesl, nghouse Eleclr!c COIP.

Elechon, c T,be D(v

01149 F!lmohm Carp

Elm, fa, N Y.

New Yo!k, NY,

07233 C!nCh G1aPh, k Co

07261 Av~et CorP

City of [ndustcy, Calf.

Culver City, C2111.

0?263 Fa![ch]fd Camera & IIIS[ COrP

Semiconductor DIV.

07322 Mtone sota Rub be,

CO

k!0”llt810 View, Cal, f

Mtnneapol, s, MInn

01387 B,rtcher

COIP

The Monterey Park, Cal If

01397 Sylvanla Elec( Prod Inc. Mt. View Operat[oos

07700 Techn\cal Wire P[oducts inc.

Moun(a In V,ew, Cal If.

C!anfofd, N J.

07910 Continental Device Corp

01933 Raytheon Mfg. co

Semiconductor DIV.

Hawthorne, Cal If

Mounlatn VIeW, Callf

01980 Hewlelt- Packard Co. , Boonton Rad!o D(v.

Rockaway, N J,

08145 US Eng, neet, ng Co

0B269 B(Inn, Delbefl Co

Los Angef es, Cahf,

Pomona, Cal[f

08358 Bulges% Battery Co,

N!agara Falls, Ontarto, Canada

08524 Oeulsch Fasfener Corp.

Los AnKel es, Cal, f.

08664 Bristol Co,, The Waterbury, Corm.

08117

Sloan

C0mP8ny Sun Valley, Cal, t.

08?18 ITT Cannon Elecktc [nc, Phoen, x O(V

Phoen!x, Arizona

08192 CBS Electronics Semiconducta!

Operations, Ocv of C B S. Inc.

08984 Mel-Rain

0$026 Babcock Relays Dtv

Lowell, Mass.

Ind, anapol\s, Ind.

09134 Texas Capac, tor Co

09145 Tech Ind Inc Atohm Elect,

09250 Elecfro Assembles, lnc,

Cosfa Mesa, Cal[f,

HouSton, Texas

B“[bank, Cal, f,

Ch!cago, III

09569 Mallofy Bat[ery co. of

Canada, Ltd.

Ta!onto, Onta[ [o, Canada

10214 General Tranws (or Wesfern Corp

104II T,-Tal, I“c

10646 Carbomnd”m Co

Los AnEeles, Calil

Berkeley, C8111.

11236 cTS of 8erne, lnc

N<agara Falfs, N.Y.

Befne, lnd

11237 Ch, cago Telephone O( Cal! foma, Inc.

So, Pasadena, Cal If.

Code

F& Mmufocfurer

Address

11242 Bay Slate Electronics CoIp.

Waltham, M8SS.

11312 Teledyne Inc. M!crowave DIV. Palo Alto, CalIf.

11314 Naftonal Seal

11534 Ouncan Elecf[omcs Inc.

Downey, Calif.

Cosfa Mesa, Calif,

11711 Gennral Instrument Corp. , Semiconductor

DIV. , Products

G{OUP

11717 Impertal Electronic, Inc.

11870 Melabs, Inc.

Newark, N.J.

Buena Parkr Cal, f,

Palo Alto, Calil,

12136 Ph]ladelph[a Handle Co.

12361 Glove Mfg. Co. , inc.

Camden, NJ,

Shady Grove, Pa.

12574

GultQn

Ind. Inc. Data System D[v,

Albuq”e[que, N. M.

12697 Clarostat Mfg. Co,

Dow, N.H.

12728 Elmal F!lter Corp.

12859 NIPPOn Elect[ic Co., Ltd.

12881 Metex Electronics Corp.

12930 Delta Semiconductor Inc.

12954 D[ckson Electronics COIP,

13103 Thermoiloy

W. Haven, Corm.

Tokyo, JaPan

Clark, N.J,

Newport Beach, Cal If,

Scottsdale, A1lzOna

Oallas, Texas

13396 TClefunken (GmbH)

Hanover, Getmany

13835 kfldland-Wr, ght Otv, o! PaClflc Indus!n es, inc.

14099 Sem-Tech

14193 Cal If, Rests to{ COrP,

Kansas City, Kansas

Newbufy Pafk, Calif.

14’298 Amet!cao Components, inc.

Santa Monica, Calif.

Conshohocken, Pa.

14433 ITT Sem!conduc for, A O!v, of In! Telephone

& T018graph Cotp.

14493 Hewlett-Packard Company

West Palm Beach, Fla,

14655 Cornell Dubl]er Electric Corp.

14674 Corning Glass Works

Loveland, Colo.

Newark, N.J.

Corning, N.Y,

San Gabriel, Cabf, 14752 Electro Cube Inc.

14960 Wlf[lams Mfg. Co

15203 Webster ElecNon, cs Co,

15287 Sclonics COIP.

15291 Adjustable Bush!ng Co.

San Jose, Callf.

New York, N.Y.

North fidge. Calif.

N, Hollywood, Calif,

15558 M1C1OO EteclfOm CS

15566 Amprobe Inst. Co!p

Garden C!ty, Long Island, N.Y.

Lynb[ook, N. Y,

15631 Cable frontcs Costa Mesa, CalIf.

15772 Twent!efh Centu!y Coil Spr!ng Co.

15801 Fenwal Elecf

15818 Amelco Inc

Inc,

16031 SPr”ce P!ne Mica Co

}6179 Om”,.8Pectra f“c,

16352 Compute, O,ode Corp.

16688 [deal Prec. Meter Co. Inc.

Santa Cfara, Cal If.

Ffam!ngham, Mass,

Mt. Vtew, Cal!f,

Sptuce P!ne. N, C.

Detroit, !11,

Lodl, N.J.

Oe Jur Meter OIV.

16758 Oelco Rad!c OIV. of G. M. COIP.

11109 The!monel, cs lnc

17474 Tranex Company

Btooklyn, N, Y.

KQkoma, fnd,

Canoga Park, Cal If,

Mountakn View, Cal I1.

17675 Hamlln Metal Products Corp.

17745 Afigstmhm Prec. inc.

Aklon, Ohio

No ffolly wood, Calff.

17870 McGrawEd [son Co,

18042 Powef Oeslgn Pac, f,c I“C

Manchester, N, H,

Palo Alto, Calif.

18083 Clev!te Corp. Sem!conductol OIV.

Palo Alto, Calil.

18324 SlEn8tlc S

COfP.

18416 Ty-Car MfE Co, , I“c

Sunnyvale, Calif,

Hollls ton, Mass,

18486 TRW Elect Camp DIV.

185B3 Curtts Instrument, Inc,

18813 E 1. OIJPont and Co, , I“C,

Oes Ptaines, Ill.

Mt. KISCO, NY.

W!lmmglnn, Del,

18911 Ou[ant Mfg. Co,

M[lwaukee, Wis.

19315 The Bend!x Corp. Nav,gatton k Control Oiv

Tetelboro, N.J,

19500 Thomas A Ed, son Iodustrl es, DIV. 01

West Orange, N,J.

19589

McGraw -Ed, son Co,

Concoa

19644 LRC Eltciron, cs

Baldwln Pa(k, Cal!f,

Hotseheads, N.Y.

19701 Electra Mfg Co.

Independence, Kansas

6-15

Section VI

Parts

Model 432A

TABLE 6-3.

CODE LIST OF MANUFACTURERS (Cont’d)

Cnde

No.

M.m.facturer

Address

20183 General Atromcs Corp.

21226 Executone, (IIC

21335 Faln(r Bea IIn E Co The

21520 Fans(eel Metallurgical Corp

Phtfadelph (a, Pa

Long Island CIfy, N.Y,

New Br(taln, Corm

N, Chicago, 111

23783 B!ltlsh Rado Electronics Ltd

24455 G E Lamp Dlvlslon

W2shlngkon, D C

24655 Generat Rad, o Co

24681 Memc Of 111 C COm P, 0,”,

Nela Park, Cleveland, Ohlc

West Concord, Mass

Huntington, Ind,

26365 G!les Reproducer Corp.

New Rochelle, N Y,

26462 Grobet File Co of Ame(lca, Inc.

26992 Hamilton Watch Co

28480 Hewlett Packard Co

Ca(lstadt, N.J,

Lancaster, Pa.

Palo Alto, Cal If,

Kenllwoflh, N,J

28520 Heyman Mfg Co.

33173 G E Rece, v(ng Tube Oep(.

35434 Lectrohm Inc

Owens boro, KY

Chicago, Ill.

36196 Slanwyck CO, ( Products Ltd

Hawkes bury, Ontario, Canada

36287 Cunningham, W.H. & HIII, Ltd.

Toronto Ontar(o, Canada

37942 P.R Mallory & Co lnc

39543 Mechanical Inaust(, es Plod, Co

Ind!anapol (s, Ind

Akron, Ohio

Keene, NH.

40920 Mr, alu(e P!ec IsIon Beal#ngs, Inc.

42190 Muter Co

43990 C A. Norgren Co

Chicago, III

Englewood, Colo

Skok, e, Ill

44655 Ohmlle Mfg Co

46384 Penn Eng 8 MIE Corp.

Ooylestown, Pa.

47904 Polarold COIP Cambridge, Mass

48620 Pleclslon Thermometer 8 IRS( Co.

49956 Microwave & Power Tube DIV

52o9o Rowan Controller Co

52983 Sanborn Company

Southampton, Pa

Walfh am, Mass,

Weshmn$(er, Md,

54294 Shall cross Mfg Co

55026 Simpson Elec(i Ic Co

55933 Sonotone CorP

Walth am, Mass.

Selma, NC

Chicago, Ill

Elms ford, N Y.

55938 Raytheon Co Commercial Apparatus & systems D(” So Norwalk, Corm.

56137 Spauld(ng

59446 Telex COIP

Flbfe Co

56289 Sprague Elecl!lc Co

59730 Thomas 8 BEI!S Co

Inc

60741 Tr(plell Electrical Inst. Co

Tonaw anda, N.Y.

North Adams, Mass.

Tulsa, Okla.

Ellzabeth, N J.

Blufftcn, Ohto

61775 Un, on Sw, tch and S#gnal, OIV of

Westlngho”se A!r Brake Co

62119 Un, versal Elect!\c Co

Plftsburgh, Pa.

OWOSSO, Mtch.

Mt Ve!non, N.Y.

63743 Ward -Leor$ard Electr, c Co

64959 Western Electr, c Co lnc New Yo(k, NY

Newark, N J,

65092 Weston Inst Inc Weston.Newark

66295 W)ttek Mfe Co, Chicago, III

66346 M(nnesola Mtn(ng 8 Mfg Co. Revere M(ncom OIV.

70276 Allen Mfg Co

70309 Alhed Control

St Paul, MInn.

Halt ford, Corm.

New York, N.Y,

70318 Allmetal ScIew P!od”ct Co lnc

70485 Atlantic Ind, a Rubber Works, Inc

Garden CIfy, N Y.

Ch(cago, 11!,

70563 A. PerIle Co Inc

70674 AOC Ploducls lnC.

7121B Bud Radio, Inc.

71286 Camloc Fastener Corp

71313 Cardwell Condenser Corp.

Union C!fy, NJ,

MlnneaQOlls, MInn.

70903 Belden Mfg Co

70998 Bird Eleclfomc Co(p

Chicago, III,

Cleveland, Ohio

New York, N.Y.

71002 Blrnbach Radio Co,

71041 Boston Gear Walks OIV of Mulray Co.

of Texas Qu(ncy, Mass

Willoughby, Oh(o

Pa(am us, N.J,

L(ndenhurst L. I., N Y

71400 Bussmann Mfg. OIV of McGraw. Ed!son Co

St. Lou(s, Mo,

Cnde

No.

MOnufOcturer

Address

74970

75042

75378

75382

75818

75915

76005

76210

76433

73734

73743

73793

73846

73899

73905

73957

14216

74455

74861

74868

72699

72765

72825

72928

72964

72982

73061

73076

7313B

71436

71447

11450

7)468

11471

71482

71590

11616

71700

11707

11744

71785

71984

72136

72619

72656

73293

73445

73506

73559

73586

73682

76487

76493

76530

76545

76703

76854

77068

71075

77221

Chicago Condenser Corp.

Cal If Spring Co Inc

CTS Corp.

ITT Cannon Electr(c Inc,

Ctnema, OIV Aerovox Corp.

C P Clare& Co

Cblcago, III

PIco-RIve(a, Cal(f.

Elkhart, Ind.

Los Angeles, Cal If.

Burbank, Cal Il,

Chtcago, III,

Cenka lab OIV. of Globe Union IIIc.

Commelclal Plastlcs Co.

Milwaukee, WIS.

Chicago, III.

Co!nlsh

Coto

Wire

Coil co

Co lnc

The New York, N,Y.

Prowdence, R. 1.

Ch(cago Mlnlalure Lamp Works

Cinch Mfg. Co. , Howard B. Jones OIV

Chicago, III.

Oow Co

fntng Corp.

Electra Mot(ve Mfg Co

Chicago, III.

M!dland, Mlch.

O,al, gh[ CO(P.

Inc. Wlllhm8nt (c, Coon,

Brooklyn, w Y lnd, ana General Corp. , Electronics OIV

Keasby, N.J.

General Instrument Corp. , Cap. O& V. Newark, N.J.

Ofake Mfg. Co.

Harwood He(ghts, Ill,

Hugh H. Eby Inc.

Phlladelphta, Pa

Gudeman Co.

Robelf M. Hadley Co,

Ch, cage, III

Los Angeles, Cal Il

Er, e Technological P$oducts, lnc Er(e, Pa

Hansen Mfg. Co. , Inc.

H,M. H2(PE(C0

Helloot OIV of

Beckman Inst. , Inc

Pf(nceton, Ind.

Chlcae,o, Ill.

Fullerton, Callf

Hughes P!oducts OIv!s Ion of Hughes

Al(craft Co,

Amperex Elect Co,

Bfadley Semiconductor Corp.

Hlcksvllle, L I N.Y.

New Haven, Corm

Calf(ng Electrlc, IRC Hartford, Coon

Ctrcle F Mfg. Co.

NewPo1t Beach, Callf

GPorge K Galret! Co , O(V, MSL

T1enton, N.J.

)ndus(rles Inc.

Federal Screw Products Inc.

F(scher Spec Ia Mfg. Co

General Indtistr, es Co The

Phlladelph (a, Pa,

Chicago, III

Clnclnn all, Oh(c

Elyr, a, Ohio

Goshen S(amplng & Tool Co.

JFO Elec(roncs Corp.

Goshen, Ind

Brooklyn, N.Y

Jenn(ogs Radio Mfg COIP

GrOOv. Pln Corp.

Slgnal(te Inc

San Jose, Calf

R(dgef!eld, N.J.

J.H Wtnns, and Sons

Neptune, N J

Wlncheste{, Mass

Industrial Condense! COIP Ch)cago, III

R F Products OIv!s Ion of Amphenol-Bocg

Electronics Carp

E.F Johnson Co

In(ernat, onal Resistance Co

CTS Kn!ghts Inc.

Danbury, Corm

Waseca, M$nn

Phlladelph la, Pa

Sandwich, III

Kulka Elec(r(c Co!porat, oo

Lenz Elect(Ic Mfg Co,

L(ttle fuse, Inc

Lord Mfc Co.

C W Marwedel

Mt Vefnon, N.Y.

Ch(cago, Ill.

Oes Planes, 11!

EIIe, Pa

San F(ancls co, Calf

General Instrument COIP. , M,cam old Olvlslon

Newark, N J.

lames M(llen Mfg Co. , Inc.

J.W Mllle! Co.

Maiden, Mass.

Los Angeles, Caflf.

Ctnch Mooadnock, DIV. of United cart

Fastener Corp.

Mueller Electctc Co

San Leand!o, Call!

Cleveland, Ohto

Nat(onal Union

Newark, N.J,

Oak Manufaclurlng Co.

The Bend#x Carp

Crystal Lake, III

Electrodynamics OIV,

Pac,l, c Metals Co

N, Hollywood, Cal, f

San Franc (sco, Calf

Phanos (ran Ins(r”men[ and Electronic Co,

South Pasadena, Cal If.

Code

No Mon. focturer

Address

77252 Phlladelph$a Steel and W(re CoIp

Phlladelph la, Pa.

77342 Amer! can Mach, ne 8 Foundry Co Potte,

& Bfuml, eld D)v

77630 TRW Electronic Components OIV

P(lncelon, I“d

Camden, N J

77638 General Instrument Corp Rectlfle[ OIV

77764 Res, sta, ce Products Co

11969 Rub be fc!afl COID of Calf

B!ooklyo, N Y

Ha[[, sb”rg, Pa

Tolrance, Cal(f

78189 Shake proof Dlv, s(on of IIlfnols Tool Works

78783 Signal Ind, ca(or Corp

78290 St; uthe!s-Ounn Inc

78452 Thompson -Bremef k Co

78411 Tll:cy Mlg C“

Elgln III.

New York, N Y.

P(tman, N.J,

Ch{cago, III

San Ffanc(sco, Callf

784B8 Stack pole Carbon Co

78493 Standa, d Thomson Corp

78553 T,nne [man Products, Inc

S( Marys, Pa

Walfh am, Mass,

Cleveland, Ohio

San Gabr, el, Caf(f.

78790 Translo! me! Engineers

78947 Uclnlte Co

19136 Waldes Koh]ooo( lnc

79142 Veede[ %00(, Inc

79251 Wenco Mfg Co

Newton v,lle, Mass

Long Island C,ty, N.Y

Ha ftford, Corm

Ch, cage, III

79127 Conllreotal Wrt Eleclran, cs CoIp

Ph,ladelph(a Pa,

19963 Z(e[, ck M(g Corp

New Rochelle, NY

80031 Mepco Olws{on of Sess$on$ Clock Co

BO120 Schn, fzer Alloy Products Co

Morristown, W,J

El(zabtth, N.J

80131 Elect lonlc Ind”str (es Association. Any brand

Tube mee(lng EIA Standa!ds-Washington, DC

80707 Ummax Switch OIV Maxon Electronics COID

80223 Un, !ed Translo, mer Corp

80248 Oxford Electrlc Corp

Wall, neford, Corm

New Yo,k, W Y

80794 Bourns lnc

80411 Acro OIV O( Robe! lshaw Controls Co

Ch(cago, Ill

R,vers, de, Cal, !

804B6 All Stat Products inc.

80509 A“ety Label Co

80583

80640

Hammarlund

Stevens,

Co

Arnold,

IOC

Co lot

81030 Inlernat, onal Ins L!uments Inc

81073 Grayhrll Co

81095 Ti, ad Transformer Corp

81312 Winchester Elec O(V, Lltfon Ind

Columbus, Ohio

Oef, ance, Oh, o

Mon[ov la, Callf

New York, N Y.

Boston, M2SS

Orange, Corm.

LaG!ange, Ill

Venice, Caltf, lnc

Oakv)lle, Corm.

81349 Mll, fary Speclflcat\on

81483 Inter nal(onal Rectlf, er CO,D

81541 AIIPa X Electronics, (IIC

El Segundo, Cal, f”

Cambridge, Malyland

81860 Bar(y Conl!ols OIV. Barry W!ght CoIp

82042 Ca!(er Prec Is Ion Elect[tc Co

Watertown, Mass.

Skokle, Itl.

82047 Speft( Fa!aday IOC Copper Hewtt

Electr,

c O,v

82142 Jeffeis Electron, cs OIv Is(on of Speer

Ho boken, NJ.

Cat bon Co

Ou BOIS, Pa

82170 Fa(rchlld Carne{a & Inst. Corp. Space L Oefense

System DIV

82209 Magwre Industries, lnc

B2219 Sylvan(a Electr(c Plod Inc

PaIam us, N.J.

Greenwich, Corm

Etecl!oa(c Tube O(wslon

B2376 AsIron Co!p

Emporium, Pa

East Newark, Hacll son, N,J,

82389 Swltchctaft, lnc

Ch(cago, Ill,

82647 Melals & Controls Inc. Spencel P[od”cts

82768 Phlll<p s-Advance Cont!ol Co

82B66 Research Products Corp.

82877 Rotmn Mfg Co Inc.

82893 Vectol Electroolc Co

Attleboro, Mass,

Joltet, Ifl.

Madison, WIS.

Woodstock, fl.

Y.

Glendale, Cal If.

6-16

Model 432A

Section VI

Parts

TABLE 6-3.

CODE LIST OF MANUFACTURERS (Cont’d)

Code

No.

k40nufactiFer

Add.ss

%766{

S7930

88148

68220

88698

89231

89473

B9665

9131J9

83142

63)2.1

‘9329#

83315

8333G

$333i s33&5

83s01

837*O

83777

83621

S3%42

84i71

84396

&4411

849?0

85(54

9.lk71

85474

9S660

859 i3

861s7

B6S19

86684

B7034

!7216

874?J

$1146

9[250

91345

Carr Fastentc CD.

flew Hampshtre Ball Beacmg, lmc.

Cam bfidga,

Mass.

Pete! botough, N, H.

General instrument Corn CaDacI[oI DIV.

ITT W:rfi and Cable Dir

Darl! o&ton, S. C.

Los AnPeles, Ca[If.

Spll;gf, eld, N.J.

Vlctofy Enc. Corp.

Ber!d!x CmP Red Bank Dry

Hubbell COlp.

Smith, Hefman H. Inc.

TeCh Labs

Red 8ank, N J.

Mundela{n, III.

Erooklyn, N.Y.

Palisade, s Park, N.J,

Central Strew CO.

Chkcago( [Il.

GavIlt

Wefe and Cable Co,

DIV. ef Amerace Co!p.

8r00kfiei6, Mass.

13u!coughs Corp. Electronic Tube DIV.

Plainfteld, N.].

Unfon Cerb!de Co!p. CDn$umer Prod. Div.

Moiiel EnE arid Mfg., Inc

Loyal Scrufigs Co

Aetonauf Ical lust. 8 Rad,n Co.

Atco Elec[rontcs Inc.

A.J Gle%eneI CO, !nC.

TRW CaPaCl!O1 01,

New York, N.Y,

Huntington, Ind.

Festus, MQ.

Led,, N.J.

Great Neck, N.Y.

San Francisco, Calif,

Oga[l ala, Neb.

Sarkes Tarztan, lnC

80nmt00 Moldtng Company

Blvnm!ngiom, Ind.

8uon1 @n, N.J.

A,B. Etnyd Co,

R,M, Efacamonie L Co.

San Francisco, Calif.

San F1anclsco,

Cal If.

Hamdec,, Corm,

NoIled Kords, Inc.

Seamless Rubber Co.

Pcecfs Ion Rubber Products Co!p.

Rad]o COW.

of Am%tlca,

ElecNOni C

Chicago, Ill,

Cltflon PIec, s+oo Products Co, , Inc.

Clifton HO, ghts, Pa.

Dayton, Ohio

Comp. b Dances D,v.

Harrison, N.J,

Mafco lndustr [es Anaheim, Cal It.

?h,lco Corpola{,on (Lansdale O, V(S, O”)

Lansdale, Pa.

Western Ftbrous Glass Producls co

San Franc fsco, CalIf

‘#M Walers & RDEBIS Inc.

Tower Mfg. CoIp,

San Franc, scn, Calil,

Providence, R. 1,

CutlerHammer, IRC.

Go.ld. Nat!onal Batte!! es, Inc.

General HIIIs, IOC,

Gray bar Elect[, c C,

Lincoln, III.

St. Paul, Mlnn,

Buffalo, N.Y.

Oakland, Caf[f.

Schenectady, N, Y

Ch!cago, III

G. E D[str(nut)ng Corp.

Un’ted Transformer Co,

US Rubber Co. Consumer Ind, ?, Plast!cs

Plod D,,

Passatc, N.J.

Bearing Engneertng Co.

San Ftanc, sco, Ca[Il,

ITT Cannon Elect, Inc. , Salem DIV. Salem, Mass.

Corm{ Spung Mfg. Co,

San Frznc Isca, Calif, fk!ller 0,81 & Nameplale co El Monte, Cal If.

Code k.

Mmufocturer Address

9S236

95238

95263

95265

95275

95348

95354

95566

95712

9$984

95907

96061

96095

96256

96296

96330

96?41

96501

91410

91506

91637

9)662

9)731

91227

91886

91929

91961

92180

92367

92601

92102

92966

93332

93369

93410

93929

94131

94144

94148

94154

94197

9422?

94330

94682

94696

95D23

R2d!o Mater[als Co.

Augat

IIIC.

Oale Electromtcs, Inc.

Elco Co,p

Chicago, [[l.

Attlebolo, Mass.

Columbus, Nebr.

WIflOw Grove, Pa.

Gremar Mfg. Co. , inc.

K F D?vefopn, ent Co

Malco MIg. Co. ( inc.

Wake f[eld, Mass.

Redwood CItY, Cal If,

Ch(cago, III.

Honeywell Inc MICIO Swftch OIV.

Nahm. Bros, SPIIOK Co.

Tr”. Connector CofP.

Fleeporl, III.

Oakland, Caltf.

Elgeet ODIIcal Co Inc.

Tensol,te Insulated Wire Co. , inc.

Peabody, Mass.

Rochester, N.Y.

IMC Magnetc$ Co!p.

Hudson Lamp Co,

Tarcy town, N Y,

Wesbury Long Island, N.Y.

Keamey, N,J,

Sylvan!a Electrlc Plod, Inc.

Sem]ccmductoc DIV

Robbms .S Myels I“c

Slevens Mfg. Co Inc

Wobucn, Mass.

Palisades Park, N.J

Mansileld, Ohio

L!v[ngston, N.J.

G.v. controls

General Cable CO(P.

Bayonne, N J,

Raylheon Co Comp. Oiv. , Ind.

Comp, Operatons

Sctenttfbc Electronics Products, IOC

Qu[ncy, Mass.

Loveland, Colo.

Wagner Elect. Corp. Tung-Sol O(V. Newa!k, N.J,

Curtlss.Wught Cofp. Electronics OIV.

East Paterson, N.J.

South Che%tec Carp

Wire Cloth Products, Inc.

Chester, Pa.

Eiell wood, III.

Wofcester Pressed Al”m!num Corp.

Worcestec, Mass.

Magnec[att Elettr, c Co

George A Ph(lbr!ck Researchers, lnc

Ch!caEo, Ilf.

All!es Products CorP

Con!lnental Connector Corp.

Boslon, Mass,

Oa” Ia, Fla.

Woods] de, N, Y.

LOOK Island, W,Y.

Leec! aft Mfg. Co. inc.

Nat(onal Co!l Co

V,tram on, [“c

Sher[dan, Wyo,

Bf, dgeport, Corm.

Gordos COrP,

Methode Mfg. Co.

A[nold Engmeenng Co.

Dage E[ec!IIc Co. , inc.

Siemon Mfg. Co.

Weckes set Co,

NugEIns La bofatortes

HI-Q OIV. of Aerovox Corp.

Thordacson .Melssner lnc,

Solar Manufactuc!ng Co.

Carlton Screw Co,

Microwave Associates, inc.

Excef Transformer Co,

8100mfleld, N J,

Rolf[ng Meadows, Ill,

Malenga, III.

Franklfn, Ind.

Wayne, Ilf.

Ch)cago, tlf.

Sunnyvale, Calif.

Olean, NV.

Mt. Carm@l, III.

Los Angeles, CalIt.

Ch!cago, Ill.

Burllnglon, Mass,

Oakland, Calif.

Code

No.

Manufacturer

Address

97464

97539

97979

97983

9B141

9B159

98220

98278

98291

98376

98731

98734

9B821

98978

99109

99313

99318

99515

99707

99800

9984B

99934

99942

99957 fndustnal Reta, n!ng Rtng Co

Automat[c 8 P!ec, sion Mfg.

Reon Reslslor Cotp.

Lttton System Inc. Adlet.Westwx

Irv(”gton, N.J.

Englewood, N.J,

Yonkers, N.Y.

Commun. O(V.

R. Tronc Is, inc.

Wew Rochelle, N.Y.

Rubber Teck, lnC,

Hewle!t. Packa[d Co. , Mosel.$y O,v,

Jama[ca, NV,

Gardena, Calif.

M!crodol, Inc.

Sea fec[ro Corp.

Pasadena, Cal}f.

So. Pasadena, CalIf,

Mamaroneck, W.Y.

ZerQ Mfe. Co.

General MIIIs Inc. , Efec![onlcs OIV.

Burbank, Calif.

Minneapolis, Minn.

Paeco DIV. of Hewlett. Packard Co.

Pafo Afto, Calif,

Noflh Hills Electromcs, inc.

Glen Cove, W,Y.

lnter”al, onal Elec Nonrc Research Carp,

Cbfumbla Techn, caf Cracp.

Vartan Associates

&tiee Corp.

Oelevan Electronics Cotp,

WIICO Corporation

Burbank, Calif,

New York, N.Y,

Palo Alfo, Calif.

Winchester, Mass.

Marshall [rid. , Capacitor OIV.

MomovIa, Calif.

Conhof Switch OIvIs Ion, Contwls Co.

of Amer!ca

El Segundo, Cal!f.

East Au IoIa, N,Y.

Renb8andt, lnc,

Hoffman Electron, cs Corp.

lndlanapolis, ind.

Boston, M@ss.

Semiconductor O,v.

El Monte, Calif.

Technology Instrument CarD of Calif.

Wewbury Palk, Cal!t.

THE FOLLOWING HP VENOORS ffAVE NO WUMBER

ASSIGNED IW THE LATEST SUPPLEMENT TO THE

FE OERAL SUPPLY COOE FOR MANuFACTURERS

HA No BOOK.

OOOOF

Ooooz

Ma[co Tool an6 OIe Los Angeles, Calif.

Wtllow Lealhef Products Corp.

Newavk, N.J,

OOOAB

000BB

ETA

Prec4st0n Instrument Compane”ts Co.

England

Van Ntiys, Calif.

000CS Hewlett. Packard Co. Cololado Springs

000MM

000NN

000QQ

Oooww

onnYY

Colorado SpmgS, Colorado

Rubber Eng. .S Oevelop,nent Hayward, Calif.

A “N’( O Mfg. Co.

Cooltron

San Jose, Calif,

Oakland, Calif.

C811f0tf11a Eastern Lab.

S. K. Smith Co.

Burlington, CalIf,

Los Ange18s, Calif.

6-17

Model

432A

Section VII

Troubleshooting, Schematics

SECTION

Vll

TROUBLESHOOTING, SCHEMATICS, AND

COMPONENT LOCATIONS

7-1. INTRODUCTION.

7-2. This section contains troubleshooting instructions, schematics, and component locations for t h e power meter.

Also included is an overall block diagram that indicates the location of test points in the instrument.

7-3. Reference designations shown within circuit card outlines are abbreviated. To find the part in the Parts

List, use the full reference designation. For example,

R6 on the A2 Meter Logic Assembly is listed as A2R6.

7-4. The Schematic Notes in Table 7-1 pertain to all

the schematics. Additional notes on the schematics indicate test conditions, and special information for use when maintaining the instrument.

7-5. TROUBLESHOOTING.

7-6. Table 7-2 is the Overall Troubleshooting chart

for the power meter. Procedures for isolating circuit malfunctions to specific stages are based on the use of the HP 8477A Power Meter Calibrator and the cali -

bration procedures in Section V. The information

obtained when calibration is attempted is used to troubleshoot the instrument.

7-7. Table 7-2 contains references that direct the

user to the detailed troubleshooting charts, Tables 7-3

through 7-11. The detailed charts refer the user to transistor stages. In a few instances, specific parts are called out as being possible causes of circuit malfunction, however, the troubleshooting charts are not intended to locate specific parts that have failed. They are intended to locate only malfunctioning stages.

7-8. SCHEMATICS.

7-9. The schematics contain signal routing infer mation, nominal voltage levels, and notes that assist in understanding the circuit. They are 1aid out to show electrical operation, and are not int ended as wiring diagrams.

7-10. Component location photographs next to the schematic foldouts indicate the physical location of parts. Test points are also shown, and are marked on the schematic in the same manner as they are in the meter.

7-11. Factory selected parts are indicated by an asterisk. These are components that generally are installed to fulfill circuit operation requirements. They may be the nominal value, or they may be some value close to nominal. In any case, if the component fails, circuit operation should be verified after these components are replaced.

7-12. AlAl AUTO ZERO ASSEMBLY.

7-13. The Auto Zero circuit is encapsulated and must be replaced as a unit. A solder removing tool, such

as the Soldapullit suction device listed in Section V,

is required to remove solder around the leads. After solder is removed, the unit must be carefully removed f romthe circuit card in such a manner that the circuits on the card do not delaminate. After the Auto Zero assembly is replaced, perform the adjustment pro-

cedure given in Section V.

7-14. TEST CONDITIONS.

7-15. For most tests of circuit operation when troubleshooting the instrument, t h e troubleshooting charts call out control settings. In special cases, notes on the schematics indicate control settings required to measure voltage levels in circuits. Generally, t h e following control settings should be selected, and changed only as the troubleshooting procedures indicate:

Raffle . . . . . . . . . . . . . . . . . . . . . . . .

.3 mW (-5 dBm)

MOUNT RESISTANCE . . . . . . ...200 (Mount installed)

CALIBRATION FACTOR . . . . . . . . . . . . . . . . . . . . ...100

COARSE ZERO . . . . . . turn until meter is at full scale

7-1

Sect ion VII

Troubleshooting, Schematics

Table 7-1. Schematic Notes

Model 432A

7-2

HP Model 478A Thermistor Mount

GENERAL INFORMATION

1. INTRODUCTION.

2. The HP Model 478A Coaxial Thermistor Mount isdesigned for use with HP Model 431 and 432 Power

Meters to measure microwave power from 1µW to

10 mW. Design of the mount minimizes adverse effects from environmental temperature changes during measurement. For increased measurement accuracy, Effective Efficiency and Calibration Factor are measured for each mount, and at selected frequencies across the operating range; the results are marked on the label of the instrument (see

Paragraph 31).

The Model 478A can be used over the 10-MHz to 10-GHz frequency range, Throughout the range, the mount terminates the coaxial input in a 50-ohm impedance, and has a SWR of not more than 1. 75 without external tuning.

3. Each mount contains two series pairs of thermistors, which are matched to cancel/the effects of drift with ambient temperature change, Thermal stability is accomplished by mounting the leads of all four thermistors on a common thermal conductor to ensure a common thermal environment. This conductor is thermally insulated from the main body of the mount so the thermal noise or shocks applied externally to the mount, such as those from handling the mount manually, cannot significantly penetrate to disturb the thermistor. This thermal immunity enables the thermistors to be used in the

8-1

Model 478A

T a b l c 1 . Spccificatif]ns

requency Ranxe: 478A: 10 MHzto 10GHz mmt Calibration: Calibration Factor and Effective

Efficiency furnishedat six frequencies between lC

MHz and 10 GHz.

[npedance: 50 ohms.

aximum Reflection Coefficient:

10 to 25 MHz: 0.273 (1.75 SWR. 11.3 cfB rcturl-

10ss) .

25 MHz to 7 GHz: 0.13 (1.3 SW’R. 17.7dB retorr loss) .

7to 10 GHz: 0.2 (1.5 SWR, 14 dB return 10SS) pcrating Resistance: 200 ohms.

ower Range with Model 431 and 432A: 1 pW to 1[ mW.

aximu~ Peak Power: 200W’.

‘aximum Average Power: 30 mW.

laximum Energy per Pulse: 10 W . PS for a PRI zlkHz:5W.

ps for a PRF <1 kHz.

lements: Field-replaceable, thermally balanced thermistor assembly.

Thermistor assembly fielc adjustable so that full “zero-set” capability can bf restored in the event of inadvertent overloat

(mount calibration no longer valid).

F Connector: Type -N male. compatible with femah connectors whose dimensions conform to MIL-C

71 or MIL-c-39012. Brass connector.

utput Connector: Mates with 431 and 432 cables.

~eight: Net. 5 oz (140 g). Shipping. 1 lb (450 g).

Uncertainty of Calibration Factor and Effective

Efficiency Data for 478A

Sum

Freq.

(GHz)

Uncertainties (7)

Cal.

Factor

Effective

Efficiency

Probable

Uncertainties (T)

‘Cal.

Factor

Effective

Efficiency

1.0

3.0

5.0

7.0

8.2

9.8

12.4

15.0

18.0

2.3

“2. 8

3.6

3.7

2.8

2.8

6.3

6.3

6.3

2.3

3.1

3.5

4.1

3.5

3.1

4.6

4.6

4.8

1.1

1.6

2.1

2.1

1.3

2.1

2.1

2.1

I

1.1

1.6

2.1

2.1

1.3

1.6

1.6

1.6

—

*Includes uncertainty of reference standard and transfer uncertainty. Directly traceal)lc to NBS.

In addition 10 the listed uncertainties. add the following for the indicated 431 ranges: O. 3“ :

0.1 mW, 10.7(’( : 0.03 nlW. 1,5(’: 0.01 n]W.

When using the 432 Power Me~cr no additional

-measurement of mlcr[~\rave p[)!!c,r d[)lvn ttl [he nlicr[>tvatt region.

4. INCOMING INSPECTION.

5, Inspect the Model 478A upon receipt for mechanical damaye.

Also check it electrically; if the mount was subjected k) severe mechanical shock during shipment.

the match bctw’een the thermistors may be affected. To

check thermistor ma[ch. proceed as described in Paragraph 58.

6. If any damage is found. inform the carrier and your nearest HP Sales and Service Office immediately.

7. PRECAUTIONS.

OPERATION

8. MECHANICAL SHOCK

9. EON OTDROPORSUBJECT TO SEVERE hlECHA!S-

ICAL SHOCK. SHOCK MAY DESTROY THE MATCH

BETWEEN THERMISTORS AND INCREASE SUSCEPTI-

BILITY TO DRIFT.

10.

BIASING THERMISTORS.

CAUTION

Before connecting the Model 478A to the 431 or 432 Power Meters, set the MOUNT RES switch to 200-ohnl position. CONNECTING

A 200-OHM MOUNT TO A POWER METER

SET FORA 1OO-OHM MOUNT CAN RESULT

IN THERMISTOR DAMAGE.

11.

MAXIMUM INPUT.

12.

The Model 478A 431 and 478A 432 combinations re spend to the average RF power applied. The maximum signal applied to the thermistor mount should not exceed the limitations for 1) average power, 2) pulse energy and 3) peak pulse power. Excessive input can permanently damage the Model 478A by’ altering the match betw’een the Rr and compensation thermistors (resulting in excessive drift or zero shift) or cause error in indicated power.

13. AVERAGE POWER. The 478A 431 and 478A ’432

combinations can measure average power up to 10 row’.

To measure power in excess of 10 nl~’. insert a calibrated directional coupler such as one of the HP Model

770 series or 790 series between the mount and the source. UNDER NO CIRCLTMSTANCES APPLY MORE

THAN 30 nlw AVERAGE POWER TO THE MOUNT.

14. PULSE ENERGY AND PEAK POWER FOR 478A

432 COMBINATION, For pulses shorter than 250 ps.

energy per pulse must not exceed 10 WJ-IJS and peak power shoL]ld never exceed 200 watts. (For example, a 40 nlW, 250 ps pulse contains 10 W-us of energy. )

Pulses lfm~cr lhan 250 ps arc all(,ivmf to ronb~in murc c]]cr~y Imt peak po~vcr n]ust not [>XC,CWI 40 n~W. Fi~ures

1 a]]d 2 interprel tl}rsc linlits In ~raphical form. (For lack (d space, the mount nameplate lists only a 5 W-ps

8 - 2

Model 478A

Figure 1. Maximum Power Meter Reading vs PRF for

-

Pulses Shorter than 250 µs

Figure 3. Maximum Power Meter Reading vs Square

w .

and Sine -Wave Frequency limit, a rating which applies to the 478A 431 combination. )

15. PULSE ENERGY AND PEAK POWER FOR 478A/

431 COMBINATION. The limitations of this combination are basically the same as the 478A 432 with the exception that at pulse repetition rates less than 1 kHz, energy per pulse must not exceed 5 W-Us and peak power must not exceed 10 mW. These limits are also

interpreted in Figures 1 and 2.

16. Square-wave modulation is a special case of pulse modulation, and maximum power-meter reading versus

square -wave frequency is illustrated in Figure 3. This

figure also holds for sine -wave modulation.

17. In the discussions above, the primary considerstion is maximum power or energy, However, for modulation frequencies less than 100 Hz, the low repetition frequent y itself causes errors in indicated power. These errors may be as large as two percent regardless of range or reading.

Figure 2.

Maximum Power Meter Readings vs Duty.

Cycle for Pulses Longer than 250 µ

S

I

18. When RF is switched by pulse-gating (coaxial solid state switches), consideration must be given to the RF energy contained in the switching pulse itself.

This energy must be added to actual RF pulse power when estimating the RF power dissipated in the ther mister mount.

PIN diode modulators of H P Model 8741A/

8716A Modulators and 8614A/8616A Signal Generators, however, are not subject to this consideration because output filtering prevents transmission of modulating signals.

19. DRIFT PRECAUTION.

20. Thermistors are inherently temperature -sensitive devices, A cold thermistor mount connected to a warm piece of equipment, or vice versa, produces rapid drift.

FOR MINIMUM DRIFT ON SENSITIVE RANGES, MAKE

SURE THAT THE MOUNT AND THE EQUIPMENTCON-

NECTED TO IT ARE AT NEARLY THE SAME TEM-

PERATURE BEFORE MAKING A MEASUREMENT.

21. ZERO-SET.

22. It is necessary to electrically zero-set the Model

431/432 Power Meter before making a power measurement. To preserve the same zero reference throughout the measurement, maintain the same thermal environment when RF power is applied. Two recommended

set-ups for 431 zero-set up are presented in Paragraphs

23 and 25. The recommended set-up for zero-set in

the 432 is shown in Paragraph 30.

23. RF POWER TURNED OFF FOR ZERO-SET.

24. There is minimum zero drift when the zero is set with the RF system connected to the thermistor mount and the RF power switch off or greatly attenuated by the generator attenuator,

The methods used to switch off

RF output in HP signal generators are listed in Table

2.

After allowing time for the mount to stabilize thoroughly, follow zero-set procedures in the 431 or

432 Power Meter manual and then turn on the RF source.

8 - 3

Model 478A

Table 2.

Methods of Switching Off RF Output of Various HP Signal Generators

HP Generator Frequency Rangc

Proedure to Switch 0ff RF Output

Model 606

50kHz to 65 MHz Increase the g e n e r a t o r o u t p u t a t t e n u a t i o n 3 0 o r more dB

Model 8614A 8616A

Model 614 616

Model 618 620

I r

Model 608

Modcl 682 687

—

Model 612

Model 690. 8690

Series

800 to 2400 MHz 1800 to 4500 MHz Release RF pushbutton

800 to 2100 MHz 1800 to 4200 MHZ Set modulation selector to OFF

3.8 to 7.6 GHz 7 to 11 GHz Set modulation selector to OFF

10 to 480 MHZ 10 to 420 MHz

1 to 2 GHz 12.4 to 18.0 GHz

I

450 to 1230 MHz

1 to 20 G

H Z

Set MOD SELECTOR to PULSE . but do not apply modulation signal to modulation input terminal

—

I

Set MODSELECTOR to PULSE 2, but do not apply modulation signal to modulation input terminal

I

Set LINE to STANDBY

25. THERMISTOR

MOUNT DISCONNECTED FOR

ZERO-SET.

26. 478A 431. When it is inconvenient to turn off the

RF power in the RF system. connect the Model 478A mount to the RF system and set RANGE on the Model

431 Power Meter for an approximate midscale reading. When the reading no longer drifts, disconnect the

Note

In the proximity of a high RF field, shield the disconnected thermistor mount from possible stray RF pick-up during the zeroset.

F i g u r e 4 .

Source Impedance Shunt in+ One RF Thrrm istor Mount mount from the source, terminate the mount, if neces-

sary, as described in Paragraph 27, and then zero-set

the power meter. Immediately reconnect the mount to the RF source for the power measurement,

27. With the Model 478A mount connected to the RF

system. the source impedance shunts one of the RF

thermistors (see Figure 4); when the hfodel 478A mount

is disconnected, the source impedance is removed.

Unless source impedance is high, this variation in impedance affects the RF bridge 10-kHz feedback loop in the power meter, and the zero-level setting obtained with the source disconnected is no longer zero for the measurement.

This error can be eliminated by terminating the mount in an impedance which approximately matches the generator impedance at 10 kHz: the termination should be connected while the mount is discon-

nected (see Paragraph 26) from the source.

For example, if the impedance presented by the RF system to 10 kHz is low (1K ohm or less) terminate the thermistor mount in a 50-ohnl resistor or a short. On the other hand. if the impedance.of the RF system at 10 kHz is high (100 Kohms or more) leave the thermistor mount unterminated durin~ zero-set.

28. Note that some 10-kHz bias signal is coupled into

the RF transmission system by C2 (Figure 5). If the

RF source output impedance at 10 kHz is 15K ohms or greater, 10-kHz bias, voltage is typically 1.3 V RMS and could equal 1.5 V RMS. For an RF source output impedance of 50 ohms at 10 kHz, bias signal voltage is typically 5 mV I? MS.

29. Theprescnce of this 10-kIIz l)ias signal m~y affcrt solid state RF sources and RF voltmeter measuremcllls,

To minimize or eliminate these effects. use an addi tional l)locking capacitor at the iVt)rfel 478A or a hi@]pass filter at l}]e RF source output.

30. 478A ‘432. When it is inconvenient to turn the

R F power off w,hile usinx the 478A 432 combination simply remove the n]ount from the snurce, and using the COARSE and FINE ZERO, zero the 432.

8 - 4

Model 478A

35.

EFFECTIVE EFFICIENCY. Effective El ficicn(y is the ratio of s~!l)stitlitcd, al]c[io or dc potver in a thern~ istor mount to the microwave RFpo\ver dissipated \vith in the mount.

Pdc Substituted

Effec(iv(~ Efficiency - p

,~wave Dissipa~crt

36. Et’t’cctivc Ef’fidicncv corrects for po!ver absorbed in parts of the mount othel’ than the detection thermis tor elements and clc -to-microwave power substitution error in the the!’mister mount, Effective Efficiency is applied as a correction factor when a tuner is used to ma(ch (he thermistor mount io the transmission line or

RF source. In this case. all of ,the RF power inc’idcnt upon the mount is absorbed in the mount.

Siocc all power is absorbed in the mount. measurement uncer tainty due to mount SWR is eliminated: ho!vever, losses in the tuner must be considered.

37. CALIBRATION DATA APPLICATIOX.

F i g u r e 5 .

Schematic Diagram of a 3$odel 478A Thernl istor Mount when Connected to a 431 Power Meter

31. MOUNT CALIBRATION DATA.

.38. When the 478A is used with the Model 43 I or 432

Power Meters, Calibration Factor or Effective Efficiency corrections can be made by setting a front panel switch.

With the proper setting; the 431 or 432 com pensates for the Calibration Factor or Effective Efficiency in the 478A, If the 478A is used with a power meter other than the 431 or 432, Calibration Factor or

Effective Efficiency corrections can be made by dividing the measured power by the Calibration Factor or

Effective Efficiency value respectively.

32. The calibration points imprinted on the label of each 478A allow power measurements to be made with increaaed accuracy.

Values of Calibration Factor and

Effective Efficiency are given at six frequencies between

10 MHz and 10 GHz. The mounts are tested on a sweptfrequency basis to assure accurate interpolation between calibration points.

Calibration Factor and Effective

Efficiency values are traceable to the National Bureau of Standards to the extent allowed by the Bureau’s calibration facilities.

39. THERMOELECTRIC EFFECT.

40. ” Mount calibration uncertainties given in Table 1

include inaccuracies caused by thermoelectric effect error.

Calibration Factor uncertainty of =1. 52 and

Effective Efficiency uncertainty of +2. 5[~ can be maintained on the three lowest power ranges of the Model

431 series Power Meters by correcting for the measurement error introduced by thermoelectric effect. An

error correction procedure is given in Paragraph 44,.

33. CALIBRATION

FACTOR. Calibration Factor is the ratio of substituted audio or dc power in a thermistor mount to the microwave RF power incident upon the mount.

Calibration Factor = ~

Pdc Substituted

~vat,e Incident

41. A mild thermocouple exists at each point of contact where the connecting wires join to the thermistor elements.

Each thermocouple creates a dc voltage.

Thus, two thermocouple voltages of opposite relative polarity are formed, one. at each junction to each thernl istor element.

34. Calibration Factor is a figure of merit assigned to

a

thermistor mount to correct for the iollowin~ sources of error: 1) RF reflected by the mount due to mismatch. 2) RF loss raused by absorption within the mount but not in the detection Thermistor elements. and 3) dc to-microwave power subst itut ion error, Calibration

Factor is applied as a ccmrection factor to all measurements made without a tuner. When these factors and

thermoelectric effect (refer to Paragraph 39) are taken

into consideration, the power incfiratcd is the power that would be delivered by the R F source to the characteristic impedance of the transmission line.

The total SWR in the (ransmissiun line determines a region of uncertainty about the measured poux?r. This suhjcct is discussed in Application Note 64. available from any

Ii’&wlett-Packard Sales and Service Of Iicc. ”

42. Ideally, each thermocouple voltage would be equal in magnitude so that they cancel with no resultanl effect on the accuracy of power measurement.

In practice however, each point of contact does not have identical thermocouple characteristics, and in adcfi tion, the tem peratures at each junction may not be the same. These differences cause an incomplete cancellation of thr thermoelectric voltages.

resultin~ in a voltage (hat causes a thcrmoclcctric effect error.

The magnitude of the error is important when making dc suhstitut iotl measurements on the O. 1 nlW. 0, 03 mw’ and O. 01 mW ranges with one of the Model 431 series Power Meters.

On other ranges, the cf’feet 1s negligible. Maximum error introducec[ by thermoelectric effect is about O. 3

IJW and is typically O, 1 MW on the O. 01 mW range.

NOTE.

Calibration will be perfomed in the AN/TSM-55V5 Maintenance

Calibration Equiptment Shelter.

8-5

TION FOR 478A 431_COIvf BINATION.

44. Use the following technique to correct for thermo-

electric effect error.

a.

Measure power.

b. Connect a HP Model 8402 Power Meter Calibrator to the power meter DC CALIBRATION AND S~B-

STITLTTION connector.

c.

Zero and null power meter.

d. Bydc substitution (refer toprocedurein 431 Manual), duplicate power measurement made in step a.

Calculate and record substituted power as P1.

e.

Reverse connection polarity between the calibrator and power meter.

f. Re-zero and re-null power meter, if necessary.

g.

Bydc substitution, duplicate lower measurement made instep a. Calculate and record substituted power as P2.

h. Calculate arithmetic mean of the two substitution powers Pl and P2.

This mean power includes a correction for thermoelectric effect error.

Power =

PI + P2

2“

45. THERMOELECTRIC ERROR FOR 478A ‘432 COM -

BINATION.

46. The thermoelectric errors present in the 431 are minimized in the 432 since the thermoelectric voltage is negligible compared with the dc voltage used to bias the thermistor bridges.

OPERATING PRINCIPLES

47. CIRCUIT DESCRIPTION.

48. Two matched series thermistors are mounted on a common thermal conducting block, represented by the

shaded rectangle in Figure 5. One pair, marked “D’

for detection, is mounted between the end of a coaxial cable and cylindrical cavity. These thermistors are exposed to incoming RF power which heats them, lowering their resistance. The other pair, marked, “C” for compensation and situated immediately outside the cavity, is completely shielded from RF. With the 478A attached to the 431 Po\ver Meter, the detection thermistors are part of {he metering circuit.

49. With the 478A attached to the 432 Power Meter the detection thermistors are part of the RF bridge and the compensation thermistors are part of the compensation bridge.

Since the two pairs of thermistors s!]ow the same thermal environment, any chan~e in temperature which affects th[, RF bridge simultaneously affr?cts the metering bridge : this allows tht, power mctrr t,ircuil to compensate for chall~rs in temperat urr and thus m inimize drift.

8 - 6

Model 478A

50. During 431 478A operation, sufficient amounts of dc and 10 kHz bias currents are supplied from the 431

Power Meter to heat the thermistors until their resistances are reduced to approximately 200$2 per series pair.

Capacitor Cl offers high impedance to 10 kHz, but is practically a short to RF. This causes “D” to appear series connected to 10 kHz, but parallel connected to’ RF. In this manner, “D’ appears to the audio bridge of the 431 Power Meter as a 2000 resistance, but terminates the coaxial cable in 500. Capacitor C2 blocks any dc and ‘audio power that may be present in the incoming signal, and passes only RF power.

51. During 432 operation

(see Figure

6) sufficient amounts of dc current are supplied from 432 Power

Meter to heat the thermistors until their resistances are reduced to approximately 200$2 per series pair.

Capacitor Cl is practically a short to RF. This causes

“D’ to appear series connected to the dc bridge, parallel connected to RF. In this manner, “D’ appears to the dc bridge in the 432 Power Meter as a 2000 resistance that terminates the coaxial cable into 50!2.

Capacitor C2 blocks any dc and audio power that may be present in the incoming signal and passes only RF power.

52. 431 POWER METER DETECTION.

53. Under normal operation, the total power supplied

to heat thermistor pair “D” (see Figure 5) consists of

1) RF signal, 2) 10 kHz,bias, 3) heat from the environment. The total power supplied to heat thermistor pair

“C” consists of: 1) dc bias, 2) an equal amount of 10 kHz bias, and 3) heat from the same environment. As

“D’ and “C” are matched thermally, the total amounts of heat applied to reduce their series resistance equally must be equal.

54. 432 POWER DETECTION.

55. Under normal operation the total power applied to

heat thermistor pair “D” (see Figure 6). consists of:

1) RF signal and 2) heat from the environment. The total power supplied to heat thermistor “C” consists of: 1) dc bias and 2) heat from the samd environment.

As “D’ and “C” are matched thermally. the total amounts of heat applied to reduce their series resistance equally must be equal.

MAINTENANCE

56. MECHANICAL SHOCK.

57. The Model 478A is a precision instrument. Avoid dropping or other mechanical shocks. Such shocks can destroy the match between the thermistors.

58. CHECK ON THERMISTOR MATCH.

59. Match between the thermistors may be checked by

comparin~ the thermistor resistances under simulated operating conditions.

Equipment required is indicated

in Figure 6.

Make connections to the (,onncrtor at the rear of the thermistor mount: pins are show’n in Fi~ure

6. Note that the small lyattery in series with tl]e IiP

Model 3440 Digital Voltmeter is connected in opposition

Model 478A

F i g u r e 6 .

Schematic Diagram of a Model 478A Thermistor Mount when Connected to a 432 Power Meter

WARNING

Under no conditions should the mount be required to carry a current higher than 14 mA.

F i g u r e 7 . Check on Model 478.4 Thermistor Resist-

ante Match to tile powT’1” supply.

The value of this buckins vollnuc should be such tkiat voltmeter resolution d{nvn to 0.001

volt is obtained. Take readinxs with sfcit(h S cunne[tcd to pin 1 and then to pin 3,

Thermistor n= [cl) is satisfactory if Ihe two readings do not differ by more than

O. 030 volt. Nonoperating mounts with readings as high as O. 150 vIJ1l can probably be repaired as ou[lined in the succeeding paragraphs.

60, REPAIR.

61. Exceeding the cw or pulse power limit of the Model

478A Thermistor Llount may result in dama~e such that the mount \rill no Ionser zero on the ~Iod~l 431 Or 432

Po\ver Meter.

62. Before adjustin% the mount in ony way. make sure

[hat themount is the cause of the problem. An open or

short indication. using the checks in Para~raphs 59 or

64. means that the mount is not reparable by the procedures outlined in the follow ins paragraphs. However.

the mount may be nonoperative but still repairable.

Test for this by using the procedures in Paragraph 58.

or by connecting the mount to a Model 431 or 432 Power

Meter and a cable which is known to be good. A faulty cable will not have continuity through the respective connector pins or may have poor contact in the mount connector. Poor contact will show as an intermittanc y or a great deal of noise (visible on the 431 or 432 Meter) when the cable is gently flexed near the connector end.

Note

The following procedures are set down for the 431 478A combination. The same procedures can be used for the 432 except_for the ZERO ‘VERMER control. These controls on the431 are replaced by the COARSE

ZERO and FINE ZERO control on the 432.

63. The major difference between the 478A 431 and

478A 432 combination is that the 478A 432 combination does not use 10 kHz as a biasing factor in the thermistor. All biasing factors in the 432 are from dc sources therefore, lowering the thermoelectric effect.

64, To troubleshoot a damaged mount, proceed as follows: a. Connect mount to Model 431.

b, Set:

MOUNT RES . . . . . . . . . ..2000hm

RANGE . . . . . . . . . . . . . ..1O mW

POWER . . . . . . . . . . . . . . . ..ON

c.

Rotate ZERO from one limit to the other.

65. If meter remains pegged upscale. the thermistor elements have been damaged. However. it may be PO S-

sible to recompcnsate lhe thermistors per Paragraphs

68 and 69 and return the mount to operation: otherwise

they must be rcplaeed.

In either case. the Effective

Efficiency and Calibration Factor chata on the nameplate

are no longer valid (see Paragraph 77).

8 - 7

Model 478A

Figure 8.

66. If meter remains pegged downscale, measure re -

sistance between pins 1 and 2, and pins 3 and 4. The resistance should measure between 1000 and 5000 ohms.

An open or shorted reading indicates the need for replacement of the thermistors.

67. If the resistance reading is satisfactory, it may be possible to recompensate the mount and return it to service.

The drift with temperiiture changes will be higher because of the damage to the thermistors, but it will be possible to zero the meter and to make measurements.

The Effective Efficiency and Calibration

Factor indicated on the label will no longer be valid

(see Paragraph 77). There are two adjusting screws,

inside the instrument which permit recompensation within limits. Most instruments with serials lower than

7663 do not have the adjusting screws at the time of manufacture, but are modified if the instrument was sent in for repair after March 1964.

68.

a.

Refer to Figure 8 and proceed as follows:

Remove the three screws (A).

Slide instrument out of its co,ver.

b.

c.

d.

Plug cover into Model 431.

Set: MOI’NTRES . . . . . . . . . ..2OO ohm

POWER . . . . . . . . . . . . . . . . . ON

69.

a.

If meter ispegged downscale:

Set RANGE to 10mW.

b.

c.

Set ZERO and VERNIER to mid-range.

Turn screws (B) clockwise, 1 8 turn alternately.

CAL TION

If there is a sudden jump in meter indication when advancing either screw, back off

1 8 turn, and donot advance that screw fur-

ther, Check resistanreas in Para~raph 66.

If either screw bottoms, do not apply force.

Thermistor replacement (Paragraph 71) is

indicated.

8-8

d. When meter pointer rises .trim [o zerowith each adjus[ing scre\v.

e.

Replace cover and three screws (A). The instrument is now operative.

Note

Make sure the three screw’s in the body of the thermistor mount are tight \vhen the mountis put Cogether; this insures quiet operation.

70. If meter is pegged upscale: a. Set ZERO and VERNIER to mid-range.

b. Set RANGE to highest position which will not peg the meter.

c.

Turn one of the screws (B) counterclockwise to obtain a meter reading half that observed in step b.

d. Turn the other screw (B) counterclockwise to zero the meter.

If it is impossible to zero the meter, re-

place the thermistors (Paragraph 71).

e.

Replace cover and three screws (A). The instrument is now operative.

71. THERMISTOR ASSEMBLY REPLACEMENT PRO-

CEDURE.

Note

After replacement of the thermistor assembly, the Effective Efficiency and Calibration Factor indicated on the label of the

mount are no longer valid (see Paragraph

77).

72. The procedure consists of removing the damaged thermistor assembly, the printed circuit assembly and replacing them with pretested assemblies included in

T a b l e 3 .

Parts Furnished in Thermistor Assembly

Replacement Kit. HP 00478-600

Model. 478A

75. REMO\’AL PROCI?DLRE.

73. The rcplzcemcnt asscmhlie$ m-c utc[cstcd a[ the factory. Rowever.

since the operation 0! the thermis tormount depends un

proper

ins(allatiol> uf [he ~ssmnbly. it may be desirable to check the S\VR and cffi c-icncy following replacement.

The efficiency may IN checked by romparing against a knmm mount.

The

SW? is cheekedat 9 (XIZ and 10 GHz. SiVR shu.tld hc apln”oximately equal at 9 and 10 Ghz. Jnd ShOUId be

1.5 nr less.

In the field, replaceable !!k’rnlis.~or assembly connection of (IIC RF thermistors to the Type Nrenter concfuu I r is made bya bellows, If Me bellows does no[ col;tart the center conductor. SV”R wdl he abcwt 2,0 at

10 GHz.

The beilolrs ma}- be L?nyhened

slight ly with a pair of tweezers,

74. The }ollowing special tools may be required for the completion of this procvxlure: a. One small screwdriver. O. 070 lip. suitable for removing a 00-90 x 1 8 scretv.

b. One pair of tweezers.

i]ml shield [Figure 9).

hlove terminal shiclcf aside.

CAL’TION

Do not break \vircs connecting printed circuit assembly to receptacle conne(tor.

b. Looscm lo$knot and remove 5 16-32 setscrcit from thermistor assembly.

c .“

Disconnec{ the three wires beti(-eeo the printed circuit assembly and the receptacle connector from the printed circuit assembly.

d. In early thermistor assemblies there is a 00-90

x 1

8 screw used to ccmncct the RF Thermistors to the

Type N center conductor. Remove this, scretv. if present. usia~ small screwdriver and tweezers.

e.

Remove the three 2-56 x 5 8 inch scre~vs holding printed circuit and thermistor assemblies to the RF connector assembly.

f. Remove printed circuit and thermistor assem-

.

blles.

g. Remove the three insulator bushings from tbernl istor assembly.

This completes the removal of the damaged assembly.

Figure 9.

Model 478A Thermistor Mount Assembly

8-9

Model 478A

F i g u r e 1 0 .

HP Model 478A Printed Circuit Assy tViring

76. INSTALLATION PROCEDURE.

a. Referring to Figure 10. connect the three wires

from receptacle connector to printed circuit assembly.

Note

For strain relief ,the wires should go through the holes indicated and connect from the bottom of the printed circuit assembly.

b.

istor

Install the three insulator bushings in the thermassembly.

c.

Pass the rcd !virc from the [hcrn)is[ur assembly

throu<h the hole indicated in Figure 10. Do not con-

ncc( to printed circuit assembly at this time.

d. Mount thermistor and printed circuit assemblies on RF coi]nector assembly. Lse three 2-56 x 5 8 inch

Screws must be tightened s~re’~sY:d 10ck’’’’ashers” firmly to]nsure proper bellows contact with the Type

N center conductor.

Note

Printed circuit assembly must be positioned so it does not cover cornpensa{in: screivs.

e.

Connect red and !vhite wires from thermistor assembly to printed circuit assembly.

f. Connect thermistor mount to a HP Model 431.

Check for proper null and zero.

g. If desired, check SWR and efficiency. The h!ount

SWR has been adjusted at the factory to be about equal at 9 GHz and 10 GHz and less than 1.5. The adjustment is made with the 5 16-23 setscrew which is secured by a locknut.

The setscrew should not be moved unless

SWR is being recalibrated. Efficiency may be checked by comparing to a known good mount.

CAUTION

To prevent pulling wires out of terminal connector, secure terminal shield with one

2-56 x3 16 inch screw while making checks.

h. When any testing or recalibration is completed.

secure terminal shield with three 2-56 x 3 16 inch screws, This completes the Installation Procedure.

77. RECALIBRATION. If recalibration of the mount

is desired. the instrument may be sent to the factory for repair and recalibration.

Any He\vlett - Packard

Sales and Service Office will arrange for such repair.

8 - 1 0

APPENDIX A

MANUAL CHANGES

BACKDATING

MODEL 432A

POWER METER

Manual Serial Prefixed: 812- Manual Printed: August 1968

MAKE ALL CORRECTIONS IN THIS MANUAL ACCORDING TO ERRATA BELOW, THEN CHECK THE FOLLOWING TABLE FOR YOUR

INSTRUMENT SERIAL PREFIX (3 DIGITS) OR SERIAL NUMBER (8 DIGITS) AND MAKE ANY LISTED CHANGE(S) IN THE MANUAL.

.

NEW ITEM.

SERIAL PREFIX OR NUM6ER MAKE MANUAL CHANGES f

SERIAL PREF[x OR NUMSER

812-00201 & above

MAKE MANUAL CHANGES

Change 1, 4 s

840 Change 1, 2, 4

] 843 I Change I, 2,3,4 I

CHANGE 1

CHANGE 2

CHANGE 3

CHANGE 4

Change A2R61 and A2R62 to R: FXD 215K OHM 0698-3454

Change A2R36 to R:FXD lM OHM 0683-1055

Change A2C24 to C: FXD 270 PF 0140-0210

Add A2C48 from A3Q38 base to ground. C: FXD 68 PF 0490-0192

Add A1R3 between Al pin 11 and +7 Vdc. R: FXD 3 1.6K 0698-3160

Delete A1R43.

Add A2C49 between A2 pin 15 and junction of A2R59 and A2R57.

C: FXD 2.2 ~f 0180-0197

Add A2R29 between ~ and the bottom of A2c31.

R: FXD 68.1$2 0757-0397

Figure Al-1, Al-2, Al-3 and Table Al- 1 and Al-2 apply to 432A Power

Meters with serial prefix 843 and below.

A1-1

Appendix 1

A1-2

Figure A1-2.

Figure A1-1

Model

432A

Reference

Desigmtion

Table A1-1. Reference Designation Index

@ Part No.

Description #

!42

A2C 1

A2C2

A2C3

A2C4

AZC5

A2C6-

A2C20

A2C21

A2C2Z

A2C23

A2C24

A2C25

A2C26

A2C27

A2C28

A2C29

A2C 30

A2C31

A2C32

AZC33

A2C 34

A2C35

A2C46

A2C47

AZC4a

A2C49

A2CRI

AZCR Z

A2CR3

A2CR4

A2CR5

A2C36

A2C37

A2C38

A2C39

A2C40

A2C41 kzc42

A2C43

A2C44

A2C45

00432–6002

00432- 200Z

0180-1819

0180-0229

0160–2917

0160–2917

016@2917

0140-0234

0140-0234

0180-1746

0140-0198

0160-0978

0160–2930

0160-2930

0180-2176

0160-2930

0180-1940

0160-2930

0180-0197

0160–267.?

01s0-0197

0160-2917

0160-2143

0160-2917

0160-2265

0180–02L9

0160–2917

0180–0106

0180-0197

0180-0291

0180-0106

0150-0059

0160-2930

0180-0197

1901-0026

1901-0026

1901-0026

1901–0026

BOARD ASSY:LOGIC

LWJARD: BLANK PC

C:FXD ELECT 100 UF +75-1OZ 50VDCW

C:FXD ELECT 33 UF 10%

10VDCH

C.:FXD CER 0.05 UF +80–20% 100VDCW

C:FXD CER 0.05 UF +80–20% IOOVDCW

FACTORY SELECTEO PART

L:FXD CER 0.05 UF +80-20% 100VDCW

FdlT ASSIGNED

NOT ASSIGNED

L:FXD MICA 500 PF 1%

C:FXD

MICA 500

PF 1%

C:FXD ELECT 15 UF 10% 20VDCW

C:FXO MICA 200 PF 5%

C:FXO MICA 1500 PF 1% 500VDCkl

C.:FXD CER 0.01 UF +80–20% 100VDCW

NOT ASSIGNED

C:FXO CER 0.01 UF +80-20% 100VDCW

C:FXD ELECT 220 UF 20% SVDCW

C:FXD CER 0.01 UF +80-20% 100VDCW

C:FXO ELECT 33 UF 10% 15VDCW

C:FXD CER 0.01 UF +80–20% 100VDCW

C:FXO ELECT 2.2 UF 10% ZOVDCW

C:FXD MY 0.047 UF 5% 80VDCW

C:FXD ELECT 2.2 UF 10% 20VDCW

L:FXD CER 0.05 UF +S0–20% 100VDCW

C:FXD CER 2000 PF +80-20% 1000VDCW

L:FXO CER 0.05 UF +80-20% 100VDCW

G:FXU CER 22 PF 5% 500VDCW

C:FXD ELECT 33 UF 10% 10VDCW

L:FXD CER 0.05 UF +80-20% 100VDCW

C:FXCI ELECT 60 UF 20% 6VDCH

C:FXD ELECT 2.2 UF 10% 20VDCW

C:FXD ELECT

1.0

UF 10% 35VDCW

C:FXD ELECT 60 UF 20% 6VDCW

CzFXO CER 3.3-0.25 PF 500VDCW

L:FXD CER 0.01 UF +80–20% 100VDCW

N(JT ASSIGNED

C:FXD ELECT 2.2 UF 10X 20VOCW

DIODE:SILICON 0.75A 200 PIV

DIODE:SILICON 0.75A 200 PIV

DIODE:SILICON 0.75A 200 PIV

I)1ODE:SILICON 0.75A 200 PIV

NOT ASSIGNED

Appendix 1

Note

# See introduction to

section VI for ordering information

A1-5

Appendix 1

Reference

Designation

@ Part No.

Table Al-1. Reference Designation Index (Cont’d)

Description #

A2CR6

A2CR7

A2CR 8

A2CR’3

A2CR1O

A2CR11

A2CR12

A2CR13

A2CR14

A2CR15

A2CR 16

A2CR17

A2CR18

A2Q 1

A2Q2

A2Q3

A2Q4

A2Q5

AZ Q6

A2Q7

A2Q8

A2Q9

A2Q1O

A2Q11

A2fJ12–

A2C119

A2(,/2C

A2Q21

A2Q22

A2Q23

A2Q24

A2Q25

A2Q26

A2Q27

A2Q28

A2Q29

A2Q3C

A2Q31

A2Q32

A2Q33

A2Q34

A2Q35

A2G36

A2Q37

A2Q38

A2Q39

A2Q4C

1902-0033

1901-0040

1901–0026

1901-0040

1901-0040

190 1–0040

1901–0040

1901-0040

1901-0040

1901-0040

1901-0040

1854–0071

1854–006z

1854-0071

1853-0012

1853-0020

1853–0020

1853–0020

1854-0071

1854-0003

1853–0001

1854-0071

1853–OOLO

1854-0005

1854-0071

1854-0071

1854-0005

1854-0071

1854-0005

1854–0071

1854-0071

1854-0071

1853–0020

1854-0071

1853-00.20

1854-0071

1854–0071

1853–001>

1853–0020

1854-0071

1854–0071

1854-0071

DIOOE BREAKOOWN:6.2V

OIODE:SILICON 30MA 30WV

OIODE:SILICON 0.75A 200 PIV

N(JT ASSIGNEO

NUT ASSiGNED

D10DE:51LIcoN 30MA

30WV

DIOOE:SILICON 30MA 30WV

DIOOE:SILICON 30MA 30WV

OIOOE:SILICON 30MA 30WV

DIOOE:SILICON 30MA 30WV

OIOOE:SILICON 30MA 30WV

OIOOE:SILICON 30MA 30WV

OIUOE:SILICON 30MA 30WV

TRANSISTOR: SILICON NPN

TRANSISTOR:SILICON NPN 2N1701

TRANSISTOR: SILICON NPN

TRANSISTOR:PNP SILICON 2N2904A

TRANSISTOR: SILICON PNP

TRANSISTOR:SILICON PNP

TRANSISTOR:SILICON PNP

TRANSISTOR:SILICON NPN

TRANSISTOR:NPN SILICON

TRANSISTOR:PNP SILICON 30V 900MW

TRANSISTOR:SILICON NPN

NUT ASSIGNEO

NOT ASSIGNEO

TtiANSISTOR: SILICON PNP

TRANSISTOR:SILICON NPN 2N708

TRANSISTOR:SILICON NPN

TRANSISTLIR: SILICON NPN

TRANSISTOR: SILICON NPN 2N708

NUT ASSIGNEO

TRANSISTOR:SILICON NPN

TRANSISTOR:SILICON NPN 2N708

TRANSISTOR:SILICON NPN

TRANSISTOR: SILICON NPN

TRANSISTDR:SILICON NPN

TRANSISTOR:SILICON PNP

TRANSISTOR:SILICON NPN

TRANSISTOR: SILICON PNP

TRANSISTOR:SILICON NPN

TRANSISTOR:SILICON NPN

TRANSISTOR:SILICON PNP 2N3640

TRANSISTOR:SILICON PNP

TRANSISTOR:SILICON NPN

TKANSISTOR:SILICON NPN

TRANSISTOR:SILICON NPN

—

Note

# See introduction to

s e c t i o n V I f o r o r d e r i n g i n f o r m a t i o n

A1-6

Reference

Designation

@ Part No.

Table A1-1. Reference Designation Index (Cont’d)

Description #

AZR 11

A2R 12

A2R13

A2R L4 h2R37

42R38 ii2R 39 t2R40 h2R41

12R42 i2R43 k2R44 k2R45

A2R26

A2R27

A2R28

A2R2~–

A2R31

&2R32 i2ft33

&2R34

42R35

42R36

A2R15

A2R16

A2R17

A2Rle

A2R19

A2R20

A2R21

A2R22

A2R23

A2R24

A2R25

A2Q41

A2Q42

A2Q43

A2Q44

A2R1

A2R2

A2R3

A2R4

AZR5

A2R6

A2R7

A2R8

A2i79

A2R 10

1853–OOZO

1853-0020

1854-0071

1854-0071

0757–C279

0683–0685

0757-0s35

0698-3156

2100-1773

0757-02$9

0757-C280

0698-3160

0698-3441

0757-0465

0757–0442

0698-3136

0757-0346

0757–0442

0757-C279

0757–0198

0698-3401

0698-3156

0757-044L

0757-0442

0698–32b0

0698–326LI

0757-0442

0757-0442

0698–3156

0757–0199

0757–0442

0757-046>

0698–3454

0757–0461

075?–0470

0?57-0442

069S-3155

0698-3155

0757–0465

0757-0461

0757-1094

0757-0461

0757-0465

TRANSISTOR:SILICDN PNP

TRANSISTOR: SILICON PNP

TRANSISTOR:SILICON NPN

TRANSISTOR: SILICON NPN

R:FXO MET FLM

3.16K

OHM 1% l/8W

R:FXO COUP 6.8 OHM 5% l/4N

R:FXD MET FLM 6.8LK OHM lZ I/.2w

NCJT ASSIGNEO it:FXD MET FLM 14.7K OHM 1% L/8W

R:VAR WW II( OHM 10%

LIN l/2W

R:FXO MET FLM 13.3K OHM 1% l/8W

R:FXD MET FLM IK OHM 1% l/8W

R:FXD MET FLM 31.6K OHM 1% l/8W

R:FXD MET FLM 215 OHM 1% l/8W

FACTORY SELECTED PART i_i:FXO MET FLM

100K

OHM 1X l/8W

R:FXD MET FLM

10.OK

OHM 1% l/8W

R:FXO MET FLM 17.8K OHM

1%

l/8W

R:FXD MET FLM 10 OHM 1% l/8W

FACTORY SELECTEO PART

R:FXD MET FLM

10.OK OHM 1% l/8W

R:FXD MET

FLM 3.16K OHM 1% l/8W

K:FXD MET FLM 10G OHM 1% l/2W k:FXO MET FLM 215 OHM 1% l/2W

NUT ASSIGNEO

NUT ASSIGNED

R:FXLI MET FLM 14.7K OHM 1% l/8W

R:FXO MET FLM 10.OK OHM 1% l/EW

R:FXO MET FLM 10.OK OHM

1%

l/8W

R:FXD MET FLM 464K OHM

1% l/SW

R:FXD MET FLM 464K OHM

1%

l/8W

R:FXD MET FLM 10.OK OHM 1% l/8W

R:FXO MET FLM 10.OK OHM 1% l/8W

R:FXO MET FLM 14.7K OHM lx 1/8bJ

NOT ASSIGNED

NOT ASSIGNEO k:FXD MET FLM 21.5K OHM 1X l/8W

R:FXO MET FLM

10.OK

OHM 1% l/8W

K:FXO MET FLM LOOK OHM

1%

l/8W

17:FX0 MET FLM 215K OHM 1% l/8W

R:FXD MET FLM 68.lK OHM 1% l/8W

R:FXD MET FLM L62K OHM 1% l/8W

R:FXO MET FLM 10.OK OHM 1% l/8W

R:FXD MET FLM 4.64K OHM 1% l/8W

R:FXD MET FLH 4.64K OHM 1% l/8W

R:FXO MET FLM

100K

OHM 1% l/8W

R:FXO MET FLM 68.LK OHM 1% l/8W lt:FXO MET FLM 1.47K OHM 1% l/8W

R:FXO MET FLM 68.lK OHM 1% l/8W

R:FXO MET FLM

100K

OHM 1% l/8W

Appendix 1

Note

# See introduction to s e c t i o n VI for ordering information

A1-7

Appendix 1

Reference

Designation

@ Part No.

T a b l e A 1 - 1 . R e f e r e n c e D e s i g n a t i o n I n d e x ( C o n t ’ d )

Description #

A2R55

A2R56

A2R57

A2R58

A2R59

A2R60

A2R61

A2R62

A2R63

A2R64

A2R65

A2R66

A2R67

A2R68

A2R69

A2R70

A2R71

A2R12

A2R73

A2R74

A2R75

A2R76

A2R77

A2R78

A2R79

A2R80

A2R81

A2R82

A2R83

A2R84

A2

A2R46

A2R47

A2R48

A2R49

A2R50

A2R5 1

A2R52

A2R53

A2R54

0757-0465

0757-0461

0757-0465

0757-0461

0757-0280

0698–3260

0757-0279

0698–31b0

0698-3428

0698–3160

0698–3260

0757-0442

0698-3260

0698–3260

0698–0084

0698-3260

0698-3260

0698-3260

0757-0439

0757-0442

0757–0461

0698-3160

0757–0442

0698–3436

0698-3156

0698–3160

0698-3444

0757-0199

2100-1769

0698-4466

0757-0346

0698-3160

0811–2277

0811-2277

0811-2537

0757-0465

0757-0401

0698-3441

0757–0.?60

0360-0124

R:FXD MET FLM

100K OHM 1% l/8H

R:FXD MET FLM 68.lK OHM 1% l/8W

R:FXD MET FLM 100K OHM 1% l/8W

R:FXD MET FLM 68.lK OHM 1% l/8M

K:FXD MET FLM LK OHM 1% l/8W

R:FXD MET FLM 464K OHM 1% l/8W

K:FXD MET FLM 3.16K OHM

1% l/8W

R:FXD MET FLM 31.6K OHM 1% l/8W

R:FXO MET FLM 14.7 OHM 1% /8W

FACTORY SELECTEO PART

R:FXO MET FLM 31.6K OHM 1%

FACTORY SELECTEO PART

R:FXO MET FLM 464K OHM 1%

R:FXO MET FLM

10.OK

OHM 1%

R:FXD MET FLM 464K OHM 1% l/8W

/8W l/8W

/8W

R:FXO MET FLM 464K OHM 1% l/8W

K:FXO MET FLM 2.15K OHM i% l/8W ii:FXO MET FLM 464K OHM 1% l/8W

R:FXO MET FLM 464K OHM 1% l/8W

R:FXO MET FLM 464K OHM

1%

l/8W k:FXO MET FLM 6.81K OHM 1% l/8W

R:FXO MET FLM 10.OK OHM 1% l/8W

R:FXO MET FLM 68.lK OHM 1% l/8W

R:FXD MET FLM 31.6K OHM 1% l/8w

R:FXO MET FLM

10.OK

OHM 1% l/8W

R:FXO MET FLM 147 OHM

1%

l/8W

K:FXO MET FLM 14.7K OHM 1% l/8W

R:FXO MET FLM 31.6K OHM 1% l/8W

K:FXO MET FLM 316 OHM 1% l/8W

K:FXO MET FLM 21.5K OHM 1% l/8W

R:VAR MW 50 OHM lC% LIN l/2W

K:FXO MET FLM 976 OHM 1% l/8W

R:FXD MET FLM 10 OHM 1% l/8W

R:FXD MET FLM 31.6K OHM 1% l/8W

R:FXO WW

10K OHM 0.1% l/40W

K:FXO WW

10K

OHM 0.1% l/40W

R:FXO WW SK OHM 0.1% l/4W

R:FXD MET FLM 100K OHM

1%

l/8W

FACTORY SELECTEO PART

R:FXD MET FLM 100 UHM 1X l/8W

K:FXO MET FLM 215 OHM r% l/8W

R:FXO MET FLM

lK

OHM 1% l/8W

TERMINAL:SOLOER LUG

Note

# See introduction to

s e c t i o n V I f o r o r d e r i n g i n f o r m a t i o n

A1-8

0140-0198

0140-0234

0150-0059

0160–0978

0160-2143

0160-2265

0160-2672

0160-2917

0160–2930

0180-0106

0180-0197

0180-0229

0180-0291

0180-1746

0180-1819

0180-1940

0180-2178

0360-0124

0683-0685

0698-0084

0698-3136

0698-3155

0696-3156

0698-3160

0698-3260

0698-3401

0698-3428

0698-3438

0698-3441

0698-3444

0698-3454

0698-4466

0757-0198

0757-0199

0757-0279

0757-0280

0757-0289

0757-0346

0757-0401

0757-0439

0757-0442

0757-L1461

0757-0465

0757-0470

0757-0835

0757-1094

0811-2277

0811-2537

1853-0001

1853-C012

1853-0015

1853-0020

1854-0003

1854-0005

@ Part No.

Table A1-2.

Replaceable Parts

Description #

Appendix 1

Mfr.

Mfr. Part No.

TQ

C:FXD MICA 200 PF 5%

C:FXD MILA 501J PF 1%

C:FXD CER 3.3–0.25 PF 500VDCH

C:FXO MICA 1500 PF 1X 500VDCW

C:FXD CER 2uO0 PF +80-20% 1000VDCW

C:FXD (.kK 2.2 PF b% 500VOCW

C:FXD MY 0.047 UF 5% 80VDCH

C:FXO CER 0.05 UF +80-20% 100VDCM

C:FXO LER 0.01 UF +80–20% 100VDCW

C:FXD ELE(,T 60 UF .20% 6VOCW

C:FXO ELELT 2.2 UF 10% 20VOCW

C:FXD ELECT 33 UF 10% 10VDCW

C:FXD ELECT 1.0 UF 10% 35VDCW

C:FXO ELECT 15 UF 10% 20VOCW

C:FXD ELECT 1O(J UF +75–10% 50VOCW

C:FXD ELECT 33 UF 10% 15VDCW

C:FXD ELECT 220 UF 20% 8VC)CW

TERMINAL:SULDER LUG

R:FXO C.CJMP 6.8 UHM 5% l/4W

R:FXO MET FLM 2.15K OHM 1% l/8W

R:FXO MET FLM 17.8K OHM 1% l/8H

R:FXD MET FLM 4.64K OHM 1X l/8W

R:FXO MET FLM 14.7K OHM 1% l/8W

R:FXD MET FLM 31.6K OHM 1% l/8W

R:FXO MET FLt4 464K OHM 1% l/8W

R:FXD MET ELM 215 C)HM 1% l/2W

R:FXD MET FLM 14.7 OHM 1% l/8H

R:FXO MET FLM 147 OHM 1% l/8W

R:FXO MET FLH 215 OHM 1% l/8W

R:FXD MiT FLM 316 OHM 1% l/8H

R:FXD MET FLM Z15K OHM 1% l/8W

R:FXO MET FLM 976 OHM 1% l/8W

R:FXO MET FLFI 10U OHM 1% l/2W

R:FXD MET FLH 21.5K OHM 1% I18W

R:FXO MET FLM 3.16K OHM 1% l/8W

R:FXO MET FAR lK OHM 1% l/8W

R:FXD MET FL!! 13.3K OHM 1% l/8W

R:FXD BET FLU 10 OHM 1% lf8W

R:FXO MET FLM 100 OHM 1% l/8W

R:FXO MET FL#l 6.81K OHM 1% l/811

R:FXO MET FLM 10.OK OHM 1% l/8W

R:FXD MET FLM 68.lK OHM 1% l/8W

R:FXO MET FLH 100K OHM 1% l/8W

R:FXD MET FLII 16ZK OHM 1% l/8W

R:FXD M&T FLM 6.81K OHM 1% l/2U

R:FXD t4tT fLM 1.47K OHM 1% l/8W

R:FXO WW 10K OHM 0.1% 1{40W

R:FXD HW 5K OHM 0.1% l/4W

TRANSISTOR:PNP SILICON 30V 900MH

TRANSISTllR:PNP SILICON 2N2904A

TRANSISTCIR:SILICON PNP 2N3640

TRANSISTOR:SILICON PNP

TRANS15TOR:NPN SILICON

TRANSISTOR:SILICON NPN 2N708

28480

28480

72982

28480

91418

0140-0198

0140-0234

301-000–COJO-339C

0160-0938

TYPE B

72982

28480

84411

91418

28480

301-NPO–ZZPF

0160–2672

TYPE 1A

TA

0180-0106

28480

28480

28480

28480

28480

56289

56289

28480

01121

28480

0180-0197

0180-0229

0180-0291

0180-1746

0180-1819

109C)336X9O15C2-OYP

109OZ27XOOO6F2-DYP

0360-0124

CB68G5

0698–0084

28480

28480

28480

28480

28480

0698-3136

0698-3155

0698-3156

0698-3160

0698-3260

28480

28480

28480

28480

28480

0698-3401

0698-3428

0698-3438

0698-3441

0698-3444

28480

28480

28480

28480

28480

0698-3454

0698-4466

0757-0198

0757-0199

0757-0279

28480

28480

28480

28480

28480

0757-0280

0757-0289

0757–0346

0757-0401

0757-0439

28480

28480

28480

28480

28480

0757-0442

0757–0461

0757-0465

0757-0470

0757-0835

28480

28480

28480

28480

04713

0757-1094

0811-2277

0811-2537

1853-0001

2N2904A z 8480

2 8480

1853-0015

1853-0020

2 8480 1 854-0003 o 2735 2 M708

# See introduction to

section VI for o r d e r i n g i n f o r m a t i o n

3

1

2

1

1

11

6

7

1

1

1

2

3

1

1

1 z

1

1

1

1

2

4

6

9

6

5

1

1

2

1

1

1

2

1

10

1

1

1

1

4 z

1

1

1

1

2

1

1

1

1

9

1

3

A1-9

Appendix 1

@ Part No.

Table A1-2.

Replaceable Parts

Description #

(Cont’d)

Mfr.

Mfr. Part No.

TQ

854- C062

854–0071

901-C026

901–0040

902-C033

100-1769

100-1773

0432–2002

0432–6002

TRANSISTOR: SILICCIN NPN 2N1701

TRANSISTOR: SILICON NPN

OIOOE:SILICON 0.75A 200 PIV

OIODE:SILICLJN 3(JMA 30klV

OIOOE BRtAKDUkdN:6.2V

R:VAI? WW 50 OHM 10.%

LIN l/2H

R:VAR Wii lK UHM 10!Z LIN l/2W

BOARO:LILANK PC

BOARO ASSY:LUGI(.

02735

28480

28480

28480

04713

2N1701

1854-0071

1901–0026

1901-0040

1N823

28480

28480

28480

28480

2100-1769

2100–1773

00432-2002

00432-6002

1

18

5

9

1

1

1

1

1

A1-10

# See introduction to

section VI for ordering information

APPENDIX A

MANUAL CHANGES

MODEL 432A

POWER METER

Manual Serial Prefixed: 914

Manual Printed: Feb 1969

MAKE ALL CORRECTIONS IN THIS MANUAL ACCORDING TO ERRATA BELOW, THEN CHECK THE FOLLOWING TABLE FOR YOUR

INSTRUMENT SERIAL PREFIX (3 DIGITS) OR SERIAL NUMBER (8 DIGITS) AND MAKE ANY LISTED CHANGE IS) IN THE MANUEL

NEW ITEM.

SERIAL PREFIX OR NUMBER

904, 919

MAKE MANUAL CHANGES

ERRATA

SERIAL PREFIX OR NUMBER

MAKE MANUAL CHANGES

ERRATA:

Page 3-3, Paragraph h: Bracket the equation as follows:

Page 3-7, Figure 3-3:

Delete the words “slow-blow” from number 1.

Change last sentence of number 7 to read “Output impedance is

1000Ω.

“

Page 4-2, Paragraph 4-13:

Page 4-4, Figure 4-3, change the value of the following capacitors,

A1C13 at collector and base of A1Q15 to .01 µf.

A1C14 at collector and base of A1Q14 to .01 µf.

Page 4-6, Figure 4-4:

Change the stock number of Q37 to 1853-0020,

Page 6-2, Table 6-1, change as follows:

Delete:

AIC13, 0160-2264 C : FXD CER 20

P

F 5%, 500 VDCW

A1C14, 0160-2264 C : FXD CER 20 PF 5%, 500 VDCW

Add :

A1C13, 0160-2930 C: FXD CER .01 µf +80-20% 100 VDCW

A1C14, 0160-2930 C : FXD CER .01 µf + 80-20% 100 VDCW

Page 6-9, Table 6-1, change as follows:

R1

2100-2659 R: VAR WW 50K OHM 5% LIN 1-1/2 W (SERIAL PREFIX 904 and below)

R1

2100-2849 R: VAR WW 50K OHM 5% LIN 1-1/2 W (SERIAL PREFIX 919 and above)

Page 6-12, Table 6-2, change as follows:

Delete: 0160-2264 C: FXD CER 20 pF 5%, 500 VDCW

Add: 2 to the TQ column for 0160-2930

Page 7-3, Figure 7-1, change as follows:

Delete test point 7 from voltage-to-time converter

A 1 - 1 1

A1-12

Page 7-5, Figure 7-7, Assy A1, change as follows:

Delete: 5. 2V from test point 7 and 2.

ADD : 1. 2V for test point 7.

5. 2V for test point 2.

Page 7-11, Figure 7-9, change as follows:

Change the value of A1C13 and A1C14 to .01 µf.

Page 7-13/7-14, Figures 7-11 and 7-12.

Delete page 7-13/7-14, Figures 7-11 and 7-12,

Add new page 7-13/7-14, Figures 7-11 and 7-12 (an attached sheet)

APPENDIX B

B1-1

APPENDIX C

MAINTENANCE ALLOCATION CHART

Section I.

INTRODUCTION

C-1.

General.

This Maintenance Allocation Chart designates overall responsibility for the performance of maintenance functions on the identified end item or component.

The inplementation of field maintenance tasks upon this end item or component will be consistent with the assigned maintenance operations.

C-2 .

Maintenance Functions.

Maintenance functions will be limited to and defined as follows:

a. Insect To determine serviceabilty of an item by comparing its

physical, mechanical and electrical characteristics with established standards.

mechanical failure by use of test equipment.

c. Service. To clean, to preserve, to charge and to add fuel, lubricants,

cooling agents, and air, If it is desired that elements, such as painting and lubricating, be defined separately, they may be so listed.

operating range.

e. Align. To adjust specified variable elements of an item to bring

to optimum performance.

To determine the corrections to be made in the readings of instruments or test equipment used in precise measurement,

Consists of the comparison of two instruments, me of which is a certified standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being compared with the certified standard.

g . I n s t a l l .

To set up for use in an operational environment such as an emplacement, site, or vehicle.

h. Replace. To replace unserviceable items with serviceable like items.

i. Repair.

Those maintenance operations necessary to restore an item to serviceable condition through correction of material damage or a specific failure. Repair may be accomplished at each category of maintenance.

C1-1

i .

Overhaul. Normally, the highest degree of maintenance performed by the Army in order to minimize time work in process is consistent with quality and economy of operation.

It consists of that maintenancs necessary to restore an item to completely serviceable condition as prescribed by maintenance standards in technical publications for each item of equipment.

Overhaul normally does not return an item to like new, zero mileage, or zero hour condition.

k .

Rebuild.

The highest degree of material maintenance. It consists of restoring equipment as nearly as possible to new conditon in accordance with original manufacturing standards.

Rebutld is performed only when required by operational considerations or other paramount factors and then only at the depot maintenance category.

Rebuild reduces to zero the hours or miles the equipment, or component thereof, has been in use.

1.

Symbols The uppercase letter placed in the appropriate column indicates the lowest level at which that particular maintenance function is to be performed.

C-3.

Explanation of Colums.

Listed below is an explanation of the columns shown in the maintenance allocation chart:

Column 1 lists group numbers, the purpose of which is to identify components, assemblies , subassemblies and modules with the next higher assembly.

b.

Column 2, Functional Group.

Column 2 lists the noun names of components asseblies , subassemblies and modules on which maintenance is authorized.

c. Column 3, Maintenance Functions. Column 3 lists the lowest level at which that particular maintenance function is to be performed.

d.

Column 4, Tools and Equipment.

This column shall be used to specify, by code, those tools and test equipment required to perform the designated function.

e .

Column 5, Remarks.

Self-explanatory.

C1-2

APPENDIX D

R E P A I R P A R T S L I S T

D-1.

This appendix provides a list of repair parts for maintenance support of the equipment. The parts along with their descriptions are listed in

table D-1 below.

D-2.

Instructions for ‘requisitioning parts not identified by Federal.

Stock Numbers require the following information be furnished to the Supply officer: a. Manufacturer’s Federal Supply Code Number.

c. Manufacturer’s nomenclature.

d Any other information as listed on parts list that will aid in ideification of the item being requisitioned.

D-3.

If DD Form 1348 is used, fill in all blocks except 4, 5, 6 and

Remarks field in accordance with A

R

725-50. Complete Form as follows: a. In Blocks 4, 5 and 6 list Manufacturer’s Federal Supply Code

Number followed by a colon and the Manufacturer’s part number.

b

Complete Remarks Field as follows;

Nomenclature of the repair part and any other identification to assist Supply Officer in procurement.

D-4.

Report of errors, omissions and recommendations Eor improving this publication by the individual user is encouraged. Reports should be submitted on DA Form 2028 (Recommended Changes to DA Publications) and forwarded direct to Commanding Officer, Frankford Arsenal., ATTN: AMSWE-SMF-

W3100, Philadelphia, Pa. 19137.

D1-1

— .-— .—

Part ND.

—- ——---

01$0-9198 ol!@323ft

0150-0059

0150-0380

9~50”9973

0160-2143

0160-2264

0160-2265

0160-2672

0150-2917

Table D-1.

Repair Parts List for Power Meter 432A

—--—-—-——.

Description

.—-— -.——

Mfr.

Federal

supply

Code

--— . -._.-—

Mfr. Part No.

-———-

Total I

Qty I

.—.—

FSN

.+--

C:FXD MECA 200 I?F

5%

C:FXD I~cA 500 l?F 11

C:FXD CER 3.3-0.25

Pi? 500VDCW

C:FXD MY 0.22 ‘UF la”: 200VDCW

C:I?XD MICA 1500 PF

1% 500VDCW

28430

28480

72982

28430

2~480

(3~4(3.9193

0140-0234

301-000-COJO-339C o150-93\3fl

0160-0978

1

1

1

1

1

,

i

I

I

I

I

I

!

i

5910-494-5056

5910-5;36-3233

91418 Type B

1 c:J?XD

CER 2000 PF t80-20% 1000VIKW

C:FXD CER 20 PF 5%

500VDLW

C:FXD CER 22 PF 5’%

500VDCW

C:FXD MY 0.047 UF

5% 80vDW

C:FXD CER 0.2.5 UF

+80-20% 100VDGJ

72982

72982

28480

84411

301-900-cOW-200J

301-NPO-22PF

0160-2572

Type TA

1

1

1

1

5910-318-3758

0150-2930 91418 TA

2

5910-194-3010

0160-3043

0130-0106

0130-0137

0130-3229

0130-0291

()”~<3()m~374

0130-1746

01,30-1819

01!30-1940

0180-2178

0360-3124

C:FXD

CER 9.01 UF

+80”20: 100VDCW

C:FXD cm 2 x 0.’305

UP 20L 250VAC

C:FXD ELIWT ‘TA 60UF

20% 6VOIW

C:FXD ELECT 2.2 UF

10% 2ovDcil

C:FXD

ELECT 33 UF

10;:

10VOCN

C:FXD ELECT lUF

10% 35VDW

C:FXD ELECT iO UF

10% 20VDC7J

C:F.XD ELECT 15 UF

1o’,, 20VOCJ

C:FXD ELECT 100 W

.+75-10% 50VDCW

C:FXD ELECT 33 UT

10% 15VDCW

C:F.Xl) ELECT 220

20% 3VD’CN

TERMMAL:SOILDER

UF

LUG

56289

56289

56239

2B[+80

56289

28439

56239

28$80

56239

56239

28LI~o

29C147A-CDH

150D6126x!)O0632

150D225x9023A2

0130-0229

15OD1O5X9O35A2

0130-93’74

150Di56X9023B2

0130-1819

109D336X9015C2-

D$-~ lo9D~27xooo8F2-

DYP

0360-3124

1

1

1

1

1

1

1

1

1

1

3

5910..127-16(33

5910-931-7955

5!710-931-7050

5940-393-933s

D1-2

.—. —

06!33-M!35

06S6-1055

0693-WM

06’?8-3136

Table D-1.

Repair Parts List for Power Meter 432A (Continued)

—— .—..

Descriptim

.

—.—. —

Mfr.

Federal

supply

Codf

—.— . —.-——

Mfr. Park No,

..——

Total ~

I

.——. —— —--- — ——- ..—-

R:PXD

COMI? 5.8

OEM !i%

1/4’4

R:FXD CxCMF 1 MEGOHM

5% I12N

R:FXD MIKf FLM 2.15K

OHM 1% l/’3w

R:FXD MET FLM 17.8K

CmM 1% l/3w

01121

01121

28490

28480

C1368G5

EB 1955

0698-0034

0698-3136

- ‘“+

1

1 5995-451-8385

I

5905-577-9667

i

1 5935-974-6073

1

I

I

! 5935-391-4247

0698-315.5

23480

0693-3?.55

1

0698-3156

36’?8-3150

0693-3250

0638-340:

R:FXD ME12 I?LM 4,64K

Om 1“%

l/3w

R::FXD MU’ FLM 14.7K

OILY 1% l/8w

R:FXD Mm’ FLM31.6K

OEM 1% l/W

~~:~~D l~T ~ 454K

OHM lx l/8w

R:FXD .MSl! ‘FLM215

OHM 1%

l/2w

.28480

2~4s0

23430

28430

0693-3156

0698-3160

0698-3260

0698-3401

3

2

1

1 t i 5905-976-3419 j 5905-974-6084

I

I i

t

I

5905-974-6078

3905-998-1809

(X598-3428

0698-3438

0698-3441

0698-3444

0693-3+54

0638-3635

0693-4466

0638-6635--

(y157-o~3~

0757-0199

R:F.XD MEr

FLM

14.7

OEM lx I}8W

1

f

R:??XI) MET FLM 147

OHM

1%

l/8w

I

R:FXD

MET

FLM215

OHM 174 l/8W

~ FGFXD Ml!X FLM 316

!

omfl%l/8w

[

1

R:FXD MET FLM 215K

Om 1’% l,!WW

I

R:FXD

MET OX 680

!

I

OHM 5;% 2W i

‘

R:FXTI MET FLM976

OHM 1% l/8w mm MEC m3ao

OHM 1% l!8W

R:3X) ME’f FLM ~00

OHM 1% l/2w mm MET FM 21.X

mm lx lIW

23480

2W30

23480

~.q490

28430

28430

28430

~~43(3

~,3490

~~43fj

0698-342!3

06%!3-3438

0698-3441

0698-3444

0698-3454

0698-3635

0698-4466

0698-6635

0757-9138

0;’5?-01’39

1

1

1

1

1

1

1

1

1

1

5905-991-4238

5935-374-6080

5905-974’-s076

\

‘ 59’35-974-6074

5935-974-6077

5905-S30-6188

59’35-981-7513

D1-3

Table D-1.

part

No.

—- — ---------- .—

:

i

~ederal

!

;Upply co&? I lifr. ?art No.

1 t

1 To?xI1. ~

QtY 1

~

–—--

1

2:3430

0757-9279

1

1

0757-0230

2?IM0

0757-(3~*3

1

0757 -!)239

28430 0757-92:8’)

1 i?s N

+_____

1

,

‘ 5905-993-1998

---

O’75?-3Y+6 o“757-043’l

R: E’XI) ME;?: FM

1/9

O!-I!”

1%

l/8w

R:FXD MET

FLM

1.00

‘Cml 1% l/3w

0757 -C)345

0:757 -!3431

3

1

.5905-993-1906

0“?57-0416

0757 -343!7

()? 57 -04;+2

0?57-0451

0757-(3455

0757-9479

R:FXD MKC FLM 511

OHM J.’Za l/8w

R:FXD MET ELM 6.81K

OHM 1.% 113-W

R:FXD MTl Fill 113.3K

CmM 1% 1!8W

R:FXD I(H;I FILM f18.lK

0}324 1% l/3w

R:FXD M?T FM ].90K

OEM 1% 1,/8w

R:FxD m:”r sill-l 152K ,

0757-9416

13757 -!3439

0757 -!)442

(3757-3451 t)737-~[~65

0757. !347!j

f

I

!

I

I

1

I

I

,

L

1

2

1

2

1

5995-398-1795

~ 5905-993-1792

I

I

5905-389-7577

t

~

5905-974-5725

I

, 5905-930-30$9

0757 -0/33.5

075? -9335

I

I

1

O757-109G

I

I 0757-1394

! (]811-2277

0811-2277

1

1

I

I

‘0811-2284

0811-253:1

0811-2535

0811-2536

0811-2537

R:

.FXD WW lK OHM

10. 1’% Ilkow

R;j’xD WJ 31.!.3 Oml

0.1% u40w

R:J?XD NW 145.0 OHM

0,1% I!40W

R:FXD liw 3167 OKM

0.1% l./aJ

R“:FXD Ww 5K OHM

0“1% l/4w s

\

2:3$30

2.YI!33

2843:)

28439

2Wt30

i

0811-223$

I

!

j 0811 -253f’t

I

\ 0811-2536

I

0811-2.537

I i

I 0311-2533

1

1

1

1

1

I

I

0811-2538

1120-1497

1420-oot32

R:FXD WW 100 OHM

0.1% I/loll

~TER

BATTERY: f@GWR12EA13L

24rI i

I

I

~ 1120-1497

I

“L120-0062

~

1

1

D1-4

— . -—.

Part ii~.

.-

Table D-1.

Repair Parts List for Power Meter 432A (Continued)

-.

— .—.— —.

‘

Mfr.

- —— -----—.— ..-——— _

Descr5ptim

— ..—-.— — --—

Federal supply code

.——... ——_.

Mfr.

Pam XO.

.-—--— .—

Total

Qty

——_,

FSN

—._ --—--— _

1853-90’31

1!353-0001 2 5961-362-5213 TRANSISTOR: Pi?l’

SILICON 30V

‘300MW

1853-0025

1853 -G020

1!3.54-0003

1854-000.5

TKANSISTWL:PNP

SILICON

2N2904,4

TRANS1ST9R:S lLJXO!J

PNP 2N3640

TfMTSISTOR:SILICOIJ

PNT?

‘TkfLNSISTOR:~

SILICON

T’RANSISTOR:SILICON mN 2N70a

2iW?904.\

1353’-0015

1853-0020

1354-0003

2N7 ’08

1

1

3

~

2

5961-’327-0845

5961-904-25[+9

5951-990-5369

1354433’9

1854-93?1

1354-0221

1901-cl!x26

1902-004!)

1902-9033

1902-0048

2100-1769

2100-1770

2100-1773

21OUCB1775

2100-2659

2110-9027

2140-9015

TRANSISTOR:SILICON

2N3053

!CELQJST.STOiZ:S ILICOFJ

NPN 2NS701

TRANSISTOR:SILXGON

N-m

‘TRANSISTOJ1 NJAL:

SILICON N-m

DXCUllI:SILICON 9.75

2i)o I?IV

l)U)DIZ:SILICON 3(!MA

30WV

I)IOIX mmcoom: lj,z~

DXODE 3REAKoOWX:

6.81V 5%

R:VAR Ww 50 Omf

10?L LIN l/2W

K:VAKWW 100 OHM

10%LIX? l/2w

R:VARWW lK OEM

10%L1N l/2W

R:VAR WW 5K OKM

10%L1N l/2w

R:VAK ml 50K OHM

Y%LIX l-1/2W

FLTSE:O.125A 250V

LAMP: GLow W.O!?

NE-2H

2if3053

2N17!)l

18Y+-0071

1854-9221

1901-0026

1901-0042

3.N823

1902-9048

2~oo..l7~9

~3,([email protected]

~loo”1773

2100-1775

2100-2659

37.2.125

~ 2H

1

1

1

1

1

3

7

1

1

1

3

1

1

1

1

5961-935-3703

5961-982-1617

5961-928-3161

5961-836-1887

5961-060-9638

5961-965-5917Ax1

5961-103-7417

5961-912-3099

5905-891-4230

5905-891-4229

5!305-115-715L3YA

5905”22i3-5990YA

6240-402-0401

D1-5

——. ..—

Part lb.

31’30-2469

3100-2&70

3131-0033

31.!31-!)957

3~,31-l180

3101-1357

/3~~@907:3

812O*”1O82

Table D-1.

Repair Parts List for Power Meter 432A (Continued)

.—.—— -. — —----- — —— .- - - -—-

1

DeScripti-m

— —— -—— .—

SWSTC

H : .Ro!! .4.RY

cALrMwrIoN

$

E’ILCT3R

SWITCH:ROT.LRY,

RAiwz

.—. —.

I

1

F

I

I

2M80 3100-2h69

I

1

28430

I

3100-2&79

I

I

1

7’9727 6510 c 1

SWITHi:SLIDE DPOT

23490 3;91-0957 1

SWITCH:TOGGIE DPOT

SWITCH:SLIDE

3P0’I 92383 IIL-1920 1

28430

—— swrrc~:mmmm:r,

FJJtE ZERO

3L01-1357 1

~/3430

CABLE AssY:PUm’1

CORD

CM3LE ASSY:5 FT, l!HEN41XTOk? +MBLE

2.!M89

8120-9073

~ 8120-1982

1

1

I

1

I

D1-6

By Order of the Secretary of the Army:

Official:

KENNETH G. WICKHAM,

Major General, United States Army,

The Adjutant General.

W. C. WESTMORELAND,

General, United States Army,

Chief of Staff.

DISTRIBUTION:

To be distributes in accordance with DA Form 12-37 (qty rqr

Block #201) Operator requirements for Gun, 20-MM XM163; DA Form

12-40 (qty rqr Block #168), Operator/Crew requirements for Gun,

20-MM XM167.

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