KT 76/78
TRANSPONDER
INSTAllATION MANUAL
006-0067-01
R E\1 . 1 D E C E MBER, 1 972
This equipment manufactured under the following U.S. Patent: 3, 366,834
ONE FULL YEAR WARRANTY
General Aviation Avionic products manufactured by
King Radio Corporation (hereinafter called King) are warranted against defects in design, workmanship and material under normal use for which intended for one year after warranty registration provided such registration occurs within eighteen months of the factory shipping date.
King's limit of liability hereunder shall be to provide necessary parts and labor to repair said product, transportation charges prepaid at either King factory or an authorized King Service Center. King shall not be liable for consequential or other damage or expense whatsoever therefore or by reason thereof.
This warranty shall not apply to any product which has not been installed by an authori z ed King Installation
Facility in accordance with the Installation manual, or which has been repaired or altered in any way so as to adversely effect Its performance or reliability, or which has been subject to misuse, contamination, negligence or accident.
This warranty Is in lieu of all other General Aviation
Avionics guarantees or warranties expressed or implied . King reserves the right to make design changes. additions to and Improvements in its products without obligation to install such in products previously manufactured.
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411iedSignal
A E R O S P A C E
BENDIX/KING ®
Alli e dSignal
Gen e ral Avi a tion Avionics
4 00 Norrh Ro g ers Road
Ol a rhe, Kansas 66062-1212
Service . Aid: KT 76/KT 78-102
Transponder
SUBJECT: Mode A and C updates to improve reliability.
Reliability of the KT 76/78 can be improved by removing and replacing the components listed below and careful alignment of the decoder one-shots.
Remove and replace the components in the unit with the ones in the following list.
COMPONENT
1413
C426
C429
C430
R474
R491
R494
R495
PART NUMBER
120-00061-0000
105-00031-0014
104-00001-0038
104-00001-0038
131-00153-0023
135-00123-0012
133-00113-0015
135-00123-0012
DESCRIPTION
IC, SN74221N
CAP, MY 3.3KKP, BOV
CAP, S/M 2400pf, 1%
CAP, S/M 2400pf, 1%
RES, F/C 15Kolj4W 5%
RES, M/F 12Ko1/4W 5%
RES, VAR 2Ko 1W
RES, M/F 12Ko1j4W 5%
Using the procedure in the KT 76/78 Maintenance Overhaul Manual align the mode
A one-shots at TP403 and TP404 for 8.6 pS +/0.1 pS.
Align the mode C oneshots at TP405 and TP406 for 21.6 pS +/0.1 ps~
These adjustments should be smooth, if they are erratic, clean or replace the variable resistors as necessary.
Date: Oct/93
P/N 601-01340-0020
SA KT 76/ KT 78-102
Page 1 of 1
THIS INFORMATION PROVIDED BY STICKS AND
STONES PROD. WE HOPE THAT IT IS USEFUL.
J(T 76A
Troubt~hootin2
Poor
sen$itivity
?
When working on a KT 76A
that
has poor sensitivity, check the following caps:
Erratic sensitivity?
Tips
C440, C441, C442, C443, C444.
·
If
these caps are black
in
color, replace them all
.
The new
~ps
will
be
):ellow in color.
.
When repairing a KT 76Ayou discover that the unit exhibits erratic sensitivity, check the ·6.2Vdc power supply line. This line should read between ·5.7Vdc and -7.5Vdc.lfthe line mea:;ures out
o
f
to l ~rance ,
· check C409 as this one has been the culprit many times
.
Rack 'em up
l;JNIT
KJ\.-1A 20
KMA 2 4
KMA 24H
KMA 24H-70171
KN · 53
KN 62A lC~ 63
Kl'l 64
KN 74
KT . 76A
KT 79
KNS
80
KNS 81
KR 85
KR 86
KR 87
K.LN 88
KLN .
90
KY 92
KY
96A
KY 97A
KX 125
KA 134
K.X
145
KX;
155
KX
165
KX 170/175/A/B
KC 190/1/2
KY
l96/l97
KY 196Nl97A ·
The following is a list of mounting rack part
. numbers for various panel mount equipment :
RACK PART#
047-01761-0001
047-04940-0004
04 7-04940-0004
047-0475 1-0004
047-04751-0004
047-04543-0002
04 7-04219-0000
047-04543-0002
047-02191-0000
047-Q3898-0002
047-05827-0004
047-05547-0001
047-04899-0001
047-0 l 846-0000
04 7-025 I 0-0001
047-05193-0002
071-01486-0000
071-01541-0000
047-04575-0002
047-08512-0004
04 7-08512-0004
047-06865-0001
047-04567-0002
047-03204-0002
047...04874-000 i
047-04874-0001
047-01695-0000
047-05114-0003
047-04676-0004
047-08512-0004
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KING
KT 76/78
TRANSPONDER
TABLE OF CONTENTS
SECTION I GENERAL INFORMATION
Paragraph
1. 1
1. 2
1. 3
1. 4
1. 5
1. 6
Introduction
General Description
Technical Characteristics
Units and Accessories Supplied
Accessories Not Supplied
Lie ense Requirements
2, 1
2.2
2.3
2.4
2. 5
2. 6
2.7
2.8
SECTION II INSTALLATION
General
Unpacking and In s pecting Equipment
Installation Procedures
Voltage Changeover Instruction ~;
KT 76/78 Installation
Connector A s semb l y Procedur e
KA 48 Installation
Location Cons i der a tion
SECTION Ill OPERATION
3. 1 Normal Operation i
2-1
2-2
2-3
2-4
2-5
2-6
2-7A
2-7B
2 8
2-9
3-1
LIST OF ILLUSTRATIONS
K T 76/78
Voltage Changeover of Front Panel
Crimpin g Tool
KT 76/78 Inte r connect
KT 76/78
KA 48 Mounting
Acceptable Cable Connections
030-0061 Connector Assembly
030-0101 Conn e ctor Assembly
Type 11 N 11 and "C 1 1 Connector Assembly
030-0005 Connector Assembly
KT 76/78 Transponder Controls i
Page
1-1
1-1
1-1
1-3
1-4
1-5
2-1
2 1
2-1
2-1
2-2
2-3
2-4
2-4
2-1 i
2-2
2-5
2-6
2-7
2-9
21 0
2-11
2-12
2-13
2-13
3-2
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KING
HISTORY OF REVISIONS
REV. 1, December, 1972
Description of C:hange
Front l-3, 1-4
2-4
2-5
2-6
2-7
2-9
2-10
2-11
2-12
2-13
3-2
H.evision No's Added
Installation Kit Parts Lists Updated
Misspelled Word
Clarification of " 596" Drawing N umber
Clarification of "696" Drawing Number
Revised Installation Drawing
Clarification of 11 696 11 Drawing Number
N ew Connector Number Shown
Clarification o.f 11 696" Drawing "Number
New Connector Assembly :Procedures
Clarification of 11 696" Drawing Number
Clarification o1 11 tl96" Drawing Numbe .
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KING
KT 76/78
TRANSPOND E R
SECTION I
GENERAL INFORMATION
1.1 INTRODUCTION
Th i s manual conta i ns information relative to the physical, mechanic a l , and electrical characteristics of the King H.adio Corporation Silver Crown KT 76/78. Information relative to the ma i ntenanc e, alignment and procurement of replac e ment parts may be found in KT 76/78 Maintenance/Overhaul Manual, KPN 006-5058-00.
1.2 GENERAL DESCRIPTION
The King KT 76 and KT 78 Transponders are radar beacon equipment desi g ned to fulf i ll the role of the airborne beacon under the requirements of the Ai.r Traffic Control Radar
Beacon System (ATCH.BS).
The KT 76/78 Transponders are capable of locating the user throu g h the air traffic controller. Range and azimuth are established by the return from the transponder's pulsed transmitter in reply to n. routine interrogation from the ground radar site.
The transponder reply is a set of pulses, selected in number, and positioned in time, one with respect to the other (not entirely unlike telegraphy). Information is conveyed to the ground in this manner. An identity code number, s elected at the front panel by the pilot is transm.itted as a Mode A reply.
Mode C, altitud e reporting, is an additional capability designed into the transponder.
However, in order to convey altitude information, the transponder must be lised in conjunction with a reporting altimeter and operated in "ALT" function.
An additional feature of the transponder and beacon system is the S. P. I. (Special Pulse,
Identification). After pressing the i dent button the transponder, when interrogated, will rep l y with a special pulse that will cause the associat e d pip on the controllers display to "bloom" effecting immediate recognition.
1.3 TECHNICAL CHARACTERISTICS
SP E CI F ICATIONS CHARACTERISTICS
TSO COMPLIANCE:
TSO CATEGORY:
C74b
KT 76 - DAPBBBXXXXXX Class 1
KT 78 DAPBBBXXXXXX Class II
Page 1-1
SPECIFICATIONS
APPLICABLE DOCUMENTS:
TEMPERATURE RANGE:
HUMIDITY RANGE:
WEIGHT:
INSTALLATION SPACE:
POWER REQUIREMENTS:
ALTITUDE:
TRANSMITTEH FREQUENCY:
TRANSMITTER POWER:
HECEIVER FREQUENCY:
RECEIVER SENSITIVITY:
MODE A CAPABiliTY:
MODE C CAPABIUTY:
SIDE LOBE SUPPRESSION:
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KING
KT 76/78
TRANSPONDER
CHARACTEIUSTICS
TSO C74b, UTCA D0-138
15° C to +55 ° C for continuous operation
Up to 95o/o at +50° C ( +122° F) for 12 hours
3. 0 lbs. including M tg rack
14 volt - 6. 25 X 1. 63 X 10.00 in.
( 15. 88 X 4. ~4 X 25. 4cm)
28 volt- 6. 25 X 1. 63 X 11. 00 in.
( 15. 88 X 4. 14 X 27. 94cm)
14 volt
28 volt
1. 3 Amp
1. 3 Amp
KT 76 Tested up to 30,000 feet which exceeds TSO requirements.
KT 78 up to 15, 000 feet
1090MHz ±3MHz
KT 76 200 watts peak minimum
KT 78 113 watts peak minimum
1030M:H z
-74dbm nominal
-72dbm minimum for 90% reply
4096 identity codes plus SPI pulse.
Accepts AIUNC attitude digitizer output, reporting in 100 foot increments from
-1000 ft. up to 31,000 feet.
3 pulse
Page 1-2
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1.4 UNITS AND ACCESSORIES SUPPLIED
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K P N
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030-0005-00
030 0101 00
1,< 030-1046-12
030-1050-00
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071-1048-00
089-8094-30
090-001 9 -07
089 2013-37
089-5907-06
089-8027-30
1 o91-oo31-os
089-8110-34
089-5903-04
A.
B.
.............
KING
KR 76/78
TRANSPONDER
K i ng K'T 76 Transponder KPN 066-1034-00, 14VDC
King KT 76 Transponder KPN 066-1034-01, 28VDC
King KT 78 Transponder KPN 066-1034 02, 14VDC
King KT 78 Transponder KPN 066-1034-03, 28VDC
Mounting Tray KPN 047-2439-01 (supplied with each unit)
King KT 76/78 Installation Kits
1) KPN 050-1244-00 (14VDC) Parts List as Follows:
DESCHIPTIO N
Connector Coax, Tf:o ~ D #4-10-4
Connector Coax, T: E D /19-30-4
Gold Contact Connector, MOL EX 1917G
(This is 12 c ontacts on a strip)
Connector, Housing
Ant e nna KA 48
Washer F la t
Retaining Ring
Nut, Hex, /16-32
Screw, P. H. P H., #6-32 X 3/8
Washer, F lat, #6
Cable Clamp
L ockwasher 1/6
Screw, PHP #4 -40 X 1 /4
QUANTIT Y
1
1
1
1
1
1
2
1
2
1
1
1
1
2) KPN 050-1244-01 (28VDC) Parts list as follows:
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KPN
04 7-2445-00
089-2016-37
089-5991-12
089-8112-34
132-0113-04
089-2009-37
091-0009-00
089-5878-0 4
Hev. 1, December, 1972
-NOTE-
This kit is same as 14 VDC Kit with the addition of the following parts.
D : ESCH.IPT ION
Shield Head
Nut Hex 10-32
Screw PHP 10-32 X 3/4
Washer Lock #10
Resistor W/ W 1011, 55W, 5%
N ut, Hex, #4-40
Grommet, 1
I
8'' l D.
Screw, PHP, #4-40 X 1/4 Springtite
QUANTIT Y
2
2
2
1
2
2
2
1
Page 1-3
........_..
KING
KT 76/78
T HANS PONDER
1.5 ACCESSORIES NOT SUfj~-LIED
A. Voltage chan g e over kit H'4 t o 2SVOC) 050'-1247-00 Parts List as follows: · ·
KPN
047-2445-00
057-1395-01
089-2009-37
089-2016-37
089-5878-04
089-5991-12
089-8112-34
091-0009-00
132-0 113 -04
DESCRIPTION
Shield, Heat
L.amp Voltage Plate
&ll v
Nut, Rex, #4-40
Nut, Hex, # 10-32
Screw, P. H. P, #4-40 x 1/4 Springtite
Screw, PHP 10-32 x 3 / 4
Washer, Lock# 10
Gro.m10et, 1/8 I. D.
H.esistor, W. W. 10 ohm, 55W, 5o/o
QUANTITY
2
2
1
1
1
2
2
2
2
B. Voltage change over kit (28 to 14VDC) 050-1247;..01 Parts List as follows:
KPN DESCIUPTION
026-0001-00
057-1395-00
Buss \Vire (#26 AWG)
Lamp Voltage Plate 14V c.
Low Loss Antenna Installation Kit, 050-1253-00
Parts I.J.st as follows:
QUANTITY
• 1 ft.
1
KP N DESCRIPTION QUANTITY
024-0013-00 oao.:.oo92-0tl
030-0102-00
Cable, Coax
Connector, Coax 'fED 9-10-5
Connector. Coax 'fED 9-30-5
17. 5 ft.
1
1
Page 1-4
Rev. 1, De cember, 1972 o
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KING
KT 76/78
TRANSPONDER
1.6 LICENSE REQUIREMENTS
T he transmitter as install e d in the aircraft, requires an Aircraft Radio Station Lic e nse.
This license is o b tained by filing FCC Form 404. The KT 76 or KT 78 may be operated for up to 30 days without a station license, after filing the FCC Form 404 and while awaiting the receipt 0f the station license, providing a copy of the I •' CC Form 404 is kept in the aircraft.
This equipment has been type accepted by the FCC and entered on t h eir list of type accepted equipment as King KT 76 or King KT 78 and must be id e ntified as such on your
FCC F orm 404, Aircraft Radio Station License Application.
Pag e l-5
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KING
KT 76/78
T :RANSPOND.gR
SECTION II
INSTALLATION
2.1 GENERAL
Installation of the KT 76/78 will differ according to equipment location and other factors.
Cable harnesses wil l be fabricated by the installing agency to fit these various requirements. This section contains interconnect diagrams, mounting dimensions and information pertaining to installation.
2.2 UNPACKING AND INSPECTING · EQUIPMENT
Exercise extreme care when unpacking the equipment. Make a visual inspection of the unit for evidence of damage incurr e d during shipment. If a claim for damage is to be made, save the shipping container to substantiate the claim. The claim should be promptly filed with the transportation company. When equipment has been removed, place in the shipping container all packing, bracing, and filler used in the original packing. Save the packing material for use in unit storage or reshipment.
2.3 INSTALLATION PROCEDURES
Listed below are factors and suggestions to consider before installing your KT 76/78.
Close adherence to these suggestions will assure more satisfactory performance from your equipment. Also note the following instructions for voltage changeover in the
KT 76/78.
2.4 VOLTAGE CHANGE OVER INSTRUCTIONS
The KT 76/78 may be ordered from the factory for .
14 volt or 28 volt operation. To convert a 14V unit to 28V operation use voltage change over kit KPN 050-1247-00. To convert a 28V unit to 14V operation use voltage change overkit KPN 050-1247-01.
1) :Remove the front panel of the radio, JTigure 2-1 shows the front of the switch board.
· In the lower rigb.t corner are located six jumper pins. Ji..,igure 2 -la shows the proper jumper connection for 14 VDC operation while F _
· 2) Lamp Voltage Tag must correspond to voltage used. The tag is located oh rear of unit and is supplied with Voltage Changeover Kit.
..Page 2-l
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KING
KT 76/78
TRANSPONDI !~ R
I
/
...
--
'",
0 0 \
- - ; ·
..) fi _ _g )
\ a 14a
' .....
__
.,..
F:IGURE 2-lA +13. 75VDC OPERATION j
I
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.,.-
...
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- - \ . o e /
' ...
-
...
FIGURE 2-1B + 27. 5VDC OPERATION
(Dwg. No. 696-3002-00) l <' IGUH.E 2-1 VOLTAG E CHANGEOVER O .
F FRONT PAN E L
3} Install the 10 ohm 55W resistor in s eries with the power input pin for
28V operation. The series resistor is not required in 14V installations.
See Figure 2-3.
2.5 KT 76/78 INSTALLATION
1. The KT 76/78 are mounted rigidly in the aircraft panel.
2. Avoid mounting clo s e to any high external heat source, if this is done then no blower or ram air cooling will be required.
3. RemembEr to allow adequate space for installat i on of cables and connecto ~ s.
4.
5.
6.
Secure the mounting tray KPN 047 2439-02 to instrument panel oer
Figure 2 -4. The rearward mounting holes must be attached to a structua l. · member of the airframe by means of support brackets.
Looking at the bottom of unit, mak e sure the front lobe of the holddown device i s in a vertical position. This can be accomplished by using
3/32n Allen wrench through the face plate.
Slide un i. t into tray until front lobe touches mounting tray.
Page 2-2 Rev. 1 , December 1912
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KING
KT 76/78
TH.ANSPONDEH.
Turn Allen wrench clockwise until .
rear lobe engages with the tray slot. Continue turning wrench clockwise until ti g ht.
-CAUTION-
Do Not Ov e rtighten Locking Screw
8. For removal turn 3/32" Allen wrench counter-clockwise until unit disengages from tray slot. Unit may then be removed.
2.6 CONNECTOR ASSEMBLY PROCEDURE
The KT 76/78 uses a special connector that mates directly with the Printed Circuit noard inside the unit. Assembly of the connector is as follows:
A. Contact Terminal Assembly Using Molex Crimper (Figure 2-2)
1. Strip each wire 5/32" for contact terminal KP N 030-1046-XX.
(The last two digits of the contact terminal part number indicate the number of terminals required).
2. Open the Mo l ex Hand Crimper HT1921 with the engraved side
. toward the operator. Place the conductor tab section of a contact terminal on Anvil B withthe contact portion facin g away from the operator. Close the crimper slightly until the contact tabs touch the female jaw.
3. Insert th e stripped conductor until the insu l ation is even with the side of the crimper facing the operator. Crimp the conductor tabs by squeezing the handles together until the jaws are fully closed
or a sufficient crimp is obtained.
4. Move the lead to Anvil A. Place the insulating tab section on
Anvil A. Crimp again Until the jaws are fully closed or a sufficient crimp is obtained.
5. If necessary, straighten the contact terminal while it is held by the crimper.
B. Contact Terminal Assembly Using Pliers
1. Strip each wire 5/32" for contact terminal KPN 030-1046-XX (the last two digits of the contact terminal part number indicate the number of terminals required).
2. Tin the exposed conductor.
3. Using needle nose pliers fold over each conductor tab in turn, onto the exposed conductor. When both tabs have been folded, firmly press the tabs against the conductor.
4. Repeat Step 3 for the insulator tabs.
5. Apply a drop of solder (using minimum · heat) to the conducto r /tab connection to assure a good electromechanical joint.
Page 2-3
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KING
KT 76/78
TRANSPONDER
C. Contact Insertion into Molex Connector Housing
1. After the contact terminals have been instal l ed on the w i ring harness, the contact terminals can be inserted into the desired location in the connector housing. The terminal cannot be inserted up-side-down. Right side up it slides into place effortlessly.
Be sure to push · the terminal all the way in, until a click can be felt, heard, or seen (through the translucent housing).
2. The self locking feature can be tested by moderately pulling on the wire.
D. Extraction of Contact from Molex Connector
If a contact is inserted into the wrong connector position, or if an installation wiring change is desired, the Molex contact can be easily removed.
1. Slip the flat narrow blade of a Molex contact ejector tool, HT -1884, under the contact on th e mating sid e of th e connec t or. Looking down, the blade can be seen sliding into the stop.
2. When the ejector is slid into place, the locking key of the contact is raised allowing the contact to be removed by pulling moderately on the lead.
3. Neither the contact or position is damaged by removing a contact · if care is exercised when contact is removed.
2.7 KA 48 INSTALLAiiON
The KA
4a antenna is a vertical quarter wave d i pol e designed for optimum performance at the transponder operating frequency. When making the antenna insta ll ation guidelines should be taken from an investigation of proven s atisfactory transponder and DME antenna installations.
....: .
NOTE-
A . 380 inch clearance hole is required.
The antenna should be kept clean. If left dirty (oil covered) the range of the transponder may be affected.
2.8 LOCATION CONSIDERATIONS
1.
The antenna shou l d be well removed from any projections, the engine( s) and propeller( s).
2. The antenna should be mounted on a bottom surface that will be level in normal aircraft flight attitudes.
Page 2-4
Rev. 1, December, 197 .
2
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4.
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KING
KT 76/78
TRANSPONDER
The surface directly beneath the antenna should be a nat plane over as large an area as possible.
Where pr·actical, plan the antenna location to keep ca bl e length as short as possible avoiding sharp bends in the cable. However, it is recommended that the separation between DME and transponder antennas be at least six feet.
Maximum separation of ADF sense antenna and transponder antenna is recommended. lN SUI .IITOR r;R IM P ANVIL A
I ~,
--.,
:~"· ·
CONI>li CTOR CRIMP Al' i V1L B
MOL!!:X CON1'A(,1' TEIL'1INAt. 1 'H 7 -T
4 < · ~ :
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MO LF : X HA N D Clll M PER HT·l'J21.
~!OL
F.
X HAND EJECTOR HT-1 884
Rev. 1, De : cP.mber, 1972
FIGURE 2-2 CRIMPING .
TOOL
(Dwg. No. 696-2151-00)
Page 2-5
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KING
KT 76/78
TRANSPONDER r
I
NGTE 1 -,/ r --,
12
<:;RO UND--......
I
I
KT 76/78
3
6
8 c
1
A ~ c
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2
4
9
10
1
7
11
5
B 4
B 1
A c
~
A
B ~
LIGH
T DIMMER
+-13. 75VDC
1
-
(030-1045-12)-(CONN:)
(03~-1046-12)(CONTACT)
(030~0061-00)
I
0-~t.-...
48 ANTENNA L __
__j
'-sEE NOTE #4
... 3A
INPUT~'""'_.
~
"
ALTITUDE
DIGITIZER
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L
_j
- -
SEE NOTE 3
NOTES:
1. CONNECTOR 'TERMINAL NUMBER IS SPECIFIED ON THE CONNECTOR.
2. A .
LL . WillES SHOULD BE #22AWG.
3. HESISTOR USED IN 27. 5VDC OPEHATION ONLY. THIS H F.
SISTOR
CAN BE MOUl'l'['ED ELSEWHERE IN AIHCRAF'T, BUT THE HEAT
SHIELD SHOULD STILL BE USED.
4. ROUTE THE A ~ TENNA CAB L E AS FAR AS PRACT I CABLE F ROM ANY
HARNESS. INNO CASE SHOULD THE ANTENNA CABLE UE LACED
INTO A HARNESS BUNDLE.
Page 2-6
F'IGUHE 2-:3 KT 76/78 INTERCONNECT DIAGRAM
(Dwg. No. 696-3003-00)
Rev. l, De<;ember. l!l72
D
D
0
0
0
G
0
0
0
0
0
0
D
0
D
D
0
D
0
0
0
D n
D
D
D
0
~
KING
KT 76/78
TRANSPONDER
IIWIKING ON COHN£CTOfl HOUSING, 030-IO~O-OO
I GAEEN SlOE UP)
(12 .1
9)
0
0
0
D
0
0
091-000$-00(~
089-~911-1212
089-8112-34(2)
089-2016--37(2)
0 4 7 2445-00
~ --
FORM RESISTOR LEADS AS SHOWN
28 V INSTALLATION
FIGURE 2-4 KT 76/78 OUTLINE AND MOUNTING DRAWING
(Dwg. No. 155-5095-00 R•l)
Rev. 1. December. 1972 Page 2-7
0
N'c; _
...... r
6 .
188
(1~. 71)
CUTOUT DIM. FOR
BEHIND AIRCRAFT
PANEL MOUNT l
..,
•
--
•
.
NOTES :
I. DIMENSIONS IN PARENTHESIS ARE IN CENTIMETERS .
2. WEIGHT;
. 6.312
(16 .
03)
CUTOUT DIM. FOR
FRONT AIRCRAFT
PANEL MOUNT l
0
0
Q
0
0
0
0
0
Q
0
0
D
0 u
D
0
0
D n
D
0
Q
D
D
~
KING
KT 76 / 78
TRA SPO N DE R
0
0
D
D
0
Q
0
D
D l
( I I I I I I I I I I I I I
L liM I I I I I I I l l I t I ~
. n===it
~
--.:..._AIRCRAFT
SKIN
Rev. 1. D e cem b er, 1 9 72
KA48 PIN 071-1048-00
FI G U RE 25 KA 48 M O . NflNG
{ Dwg . N o. 6 9 63004 -0 0 )
P ag e 29
,...,.,.
K'f-<~~8
T R AN SPO DER
Configuration # 1. f · :>r us i ng RG 58 ca b l e. T h e maximum cab l e l engt h f or t his install a tion is 9 feet.
}("r 7 5/
78
UG-88/U
(030·0005-00)
Configuration #2. A maximum cabl e length o f 1 7 . 5 f eet. A ll t he parts necessary for this installation are con t ained in the low loss antenna ins t alla ti on kit (050-1253-00),
17.5
1
MAX.1
I
·
y
I
I )
-:1.
030-0061-00
KA48
KPN 024-0013-00
TIMES PART NO.
AA2413
KP N 03Q-0092-00
KT 761
78
Configuration # 3. for using RG8 c a b le. T h e maximum cable lengt h for thi~ installation is 21 feet.
o-dltJ
KA 48 r
"MAX1
H
UG·BSIU
.
KPN 030-002 D-Ol til
/1
I l~20 1
RG-8
MAX.1~ l
\
KPN 030-Q021-01
.
16"MAX__.
I
~
KT
I
030-otot-oo
76/
78 or
00
(030-0005-00}
FIGURE 2-6 ACC EPT AB LE CABLE CO NNE CT I O N S
(Dwg. N o. 6 9 6-3006-00)
Rev. 1, D e c ember, 1972
Page 2-10
{}
0
0
0
D
0
D
0
D
0
D
0
D
D
0
0
0
Q
0
0
0
~
KING
KT 76/78
TH.A .
~ SPOND E R
Tr i m coax cable o u te r insu la tion as s hov.rn.
F o d braid back o ve r ou tcr cover of coax.
Do not cross strands. n
So ld er center con d uctor to center pin of conductor. Make su re front end of braid
(P o i nt of fo ld ) is even with bottom of connec t or. (Shown b y arrows)
Slide connector cap, with c le aranee hole in p osit i on to c l ear di e lectri c, on to connector unti.l it sna p s in pl ace.
D
IJ
0
Q
0
0
D
D
Push braid forward and flatten a g ainst connector cap an d solder.
So ld er tac connector cap to connector in at l eas t two p l ac e s t o insure g ood e l ectrical contact.
. - - - - - - - - - - W A R N I N G -
CLOSE ADHERENCE TO T HIS PROCEDURE IS NECESSARY
FOR AN I N TERFERENCE FREE INSTALLATION.
FIGURE 2-.7A 030-0061-00 CON J\TE CTOR ASSE MB LY
Dwg. N o . 696-3006-00
Rev. 1~ December, 1972 Page 2-11
..........,.
KING
KT 76 / 78
TRA SPO ND ER
CONNECTOR ASSEMBLY INSTRUCTIONS
DOCUMENT OCie-1058·00. OCT, lt12
Page 2-12
T r im coax outer i n s ulation a !! s h o wn.
T r im bra i d b ut n o t center c o nduct o r o r in s ulat .
ion back 0.25".
St ri p i nsu l ation b a ck 0 .
1 25".
Insert cable _ thro ug h side wall of co n nector and so l der cent e r c o nduct or to center p in of connector. Hea t t h e o uts i d e of the connect a · sleeve a n d at the same t i we ap p ly solder be tween br ai d a nd sleeve. Continue to ap p l y h e a t un t · i l the S t>lder flow s .
In s ert co n n ector cap i nto end o f fit· t i ng an d tuck solder in 2 p l ace s .
D
0
D
-WARNING-
CLOSE ADUERANCE TO THIS PROCEDURE IS N ECESSARY
FOR AN INT ERFERE N CE FREE INSTALLATIO ' .
FlGURE 2-7B 030-0101-00 CON N ECTOR ASSE M BLY
(Dw g . N o. 066-106.6-00)
Rev. 1, December, 1972
0
0
0
0
D
0
D
0
0
0
0
D
D
0
0
0
0
0
0
D
0
0
~
KING
K T 76/78
THA N S P O DEH
P l ace nut and g as k e t over cable and cut jacket to d imension sh own.
Co mb out b raid and fold out. Cut cable dielectric t o dimension shown. Tin cen t er cond u c t or.
P ull br a i d wires f orward and taper toward c ente r conductor. P~ ace clamp over braid and pu s h b ack agains t ca b le jacket.
F ol d b ac k b raid wir es as shown, trim to proper length (D) and form over clamp as show n . Solder con t act t o center conductor.
In sert cab l e and parts into connector body. ak e sure s h arp edge o f clamp seats properl y in gasket . Tight en nut .
EXAMPLE
KPN
030-0020-01
·
030-002 1 -0 I
S I ZE
RG/U CAB L E
8
A
D I MENS I ONS
8 c
D
9/32 1 /8 5132 3164
58 9/32 1 /8 5/32 3/64
FIG URE 28 T Y PE " "A N D " C'' CO Nl\TE CTOR ASS EM BLY
(Dw g. o. 696-3007-00)
0
0
D
FIG U RE 2-9 030-0005 00 CO T EC"fOR ASSE M BLY
( Dwg . N o. 6 96-3008-00 )
R ev. 1, Decem b er, 1972 Page 2-13
0
D.
0
0
0
0
0
0 n
D
D
D
0
0
0
0
...........,..
Kl'tn~a
T R A
s p o
DE R
SECTION Ill
OPERATION
3.1 NORMAL OPERATION
The tr a nsponder is t u rned on by rota ti ng t h e fu nc ti on sel e c t or f rom the off position to any other position.
-NOTE-
T he KT 76 / 78 sh ould be t u rne d o f f be f ore st ar t in g aircra ft enginc (s }.
After being turned on there i s a 30 second d elay b efore t he uni t b eco me s fu nctional.
This is to permit the t ransmitter t ube t o w arm-up and stab il ize. U sually th e f unction switch will be rotat ed t o the " s t andby " po s ition, however, an y o pe rative pos i tion will initiate the time delay turn on. An y ti me t h at th e f unction sw it ch i s i n the "ON" or
11 ALT" position the t ranspon de r becomes an ac ti ve p a rt o f t h e be acon system. rt is undesirable from a sys t em s view point to be opera t in g ( func ti on selector in e i th er of these positions) while on the g round, t axiing, o r r u nning up a t a t ermina l w it h a col ocated beacon interroga t or. Attenti on sho ul d be paid to the code sele cte d on t h e contro l head. The selected code sh oul d b e in accor d ance wi th ins t ruc t ions f or I F R f li ght or rul es applicab l e t o t ran s pon d e r u t ili z at i o n f or V F R flight .
--NOTE-
N ever a cti va t e t h e t ransponder with eithe r Co d e 0000, 7 700 or 7777 selecte d on th e co nt rol h ea d . Code 7700 i s se le cted f or emer ge ncies.
During normal transponder operation, a fla shing l amp is an indication o f a t ransmitted reply. An in t errogation will no rm all y b e at 1 0 15 seco nd s int ervals. Lamp flashes within this interval may be f ro m noise, a second or t h ird in t erro ga t or, or from side lobes from interroga t ors w i t h ou t side lobe suppre ssi on.
"ON" function will be th e c ust oma ry m od e of opera ti on. If an a lt i t u de digitizer i s part of the system then "AL T" funct i on w ill be selec t e d if al ti t ude reporting is requested by traffic control. "ALT" func ti o n ena b les t h e t ran sp on der t o enco de a n alti t ud e reply.
The IDENT feature is used a t t he req ue s t o f the t raffic con t ro ll e r . T h e ID.ENT button is deprcs~ed momentarily and then r e l ease d . A memory holds th e I D E . T reply f or an interval to a~ s ure th e proper reply f or a t l ea s t o ne ra d ar sweep. Thi s memory also turns the reply lamp on ste a dy a s an in dic ation o f t h e id en t f unc ti on.
Page 3l
~
KING
KT 76 / 78
T RA N SPO NDER
-NOTE-
C onsu lt th e airport / f ac ility d ir e c t or y section o f t h e Airm an s I nforma ti on
M anual f or th e location of r a d ar beacons. A ir tra ffi c contro l ra d ar b eacon sys t em (A T C RB S ) D e s c ript i o n :
A IM , Sec ti o n L R adar beacon proce d ures: AI M , Sec ti on II.
C O D E
S t: U ; C T<..l
ll.
Page 3-2
F IG U R E 31 K T 7 6/ 7 8 TRA N S P O ND E R C O NT ROLS
(Dw g . N o. 696 30 0 9 0 0)
Rev. 1, D ec ember, 1972
0
0
D
0
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D
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0
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0
0
D
0
0
0
D
0
0
D
0
0
0
0
0
0
0
0
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0
0
INSERTED AS A COURTESY, NOT PART OF THE ORIGINAL MANUAL.
T rans po n det"
KING
KT 76/78
Co n nector
1 1 2
Page K-76
C i rcu it P in# Notes
1 3.
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1 4 V OLT D I M MER .
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G R O U N0 .........
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Note s
1 . I n t ern all y s e t w it h j umpers beh i nd f a ce plat e.
F or famili ariza ti on on l y. Cons ult the manuf ac t urers curren t d ata .
