TM 11-5820-520
TM 11-5820-520-20
TM 11-5820-520-20
DANGEROUS VOLTAGES EXIST IN THIS EQUIPMENT
Voltages as high as 128 volts ac, 3,000 volts dc, and 10,000 volts RF are
used in the operation of Amplifier, Radio Frequency AM-3349/GRC-106.
Be careful when working near the antenna or the antenna connectors. RF voltages as high as
10,000 volts exist at these points. Maintenance personnel should be familiar with the safety
requirements in TB SIG 291 before installing or operating Radio Sets AN/GRC-106(*).
DEATH ON CONTACT may result if you fail to follow these precautions and
requirements. Set all equipment to OFF before connecting any power
leads to a power source.
Fumes of TRICHLOROTRIFLUOROETHANE are poisonous; provide thorough ventilation whenever
it is used. DO not use it near open flames or a hot surface. DO not get it on your skin.
Use gloves, sleeves and an apron which the solvent cannot
penetrate. If the solvent is taken internally,
see a doctor immediately.
TM 11-5820-520-20
C1
HEADQUARTERS
DEPARTMENT OF THE ARMY
Washington, DC, 1 January 1989
CHANGE
No. 1
ORGANIZATIONAL MAINTENANCE MANUAL
RADIO SETS
AN/GRC-106 (NSN 5820-00-402-2263)
AND
AN/GRC-106A (NSN 5820-00-223-7548)
TM 11-5820-520-20, 22 November 1982, is changed as follows:
1. Remove old pages and insert new pages as indicated below. New or changed material is indicated by a
vertical bar in the margin of the page. Changes to illustrations are indicated by a miniature pointing hand.
Remove pages
Insert pages
Inside Front Cover . . . . . . . . . . . . . . . . . . . . . . . . . None
b through e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A through E/(F blank)
i through 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..i through 1-2
2-1 and 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1 and 2-2
2-7 through 2-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7 through 2-16
2-19 and 2-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19 and 2-20
2-23 and 2-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23 and 2-24
A-1/A-2 blank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1/(A-2 blank)
B-3 through B20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. B-3 through B-24
C-1 and C-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1 and C-2
Glossary and Index 1 . . . . . . . . . . . . . . . . . . . .Glossary-1/(Glossary-2 blank)
Index 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lndex-1 lndex-2
2. File this change sheet in the front of the publication for reference purposes.
By Order of the Secretary of the Army:
CARL E. VUONO
General, United States Army
Chief of Staff
Official:
WILLIAM J. MEEHAN II
Brigadier General, United States Army
The Adjutant General
DISTRIBUTION:
To be distributed in accordance with DA Form 12-51 unit
requirements for AN/GRC-106.
TM
11-5820-520-20
DANGEROUS VOLTAGES EXIST IN THIS EQUIPMENT
Voltages as high as 128 volts ac, 3,000 volts dc, and 10,000 volts RF are
used in the operation of Amplifier, Radio Frequency AM-3349/GRC-106.
DO NOT REMOVE EQUIPMENT FROM CHASSIS CASE.
DANGEROUS VOLTAGES EXIST AT AM-33491/GRC-106 50 OHM
LINE AND WHIP ANTENNA CONNECTORS
DON’T TAKE CHANCES!
Be careful when working near the antenna or the antenna connectors. RF voltages as high as
10,000 volts exist at these points. Maintenance personnel should be familiar with the safety
requirements in TB SIG 291 before installing or operating Radio Sets AN/G RC-106(*).
DEATH ON CONTACT may result if you fail to follow these precautions and
requirements. Set all equipment to OFF before connecting any power
leads to a power source.
Fumes of TRICHLOROTRIFLUROETHANE are poisonous; provide thorough ventilation whenever
it is used. Do not use it near open flames or a hot surface. Do not get it on your skin.
Use gloves, sleeves and an apron which the solvent cannot
penetrate. If the solvent is taken internally,
see a doctor immediately.
Change
1
A
TM 11-5820-520-20
WARNING
RADIATION HAZARD
RADIOACTIVE MATERIAL
CONTROLLED DISPOSAL REQUIRED
ACCOUNTABILITY NOT REQUIRED
Meter, electrical indicating . . . . . . . . . . . .RA 226. . . . . . . . . . . .1.0 uCi . . . . . . . . . ...6625-01-044-1801
Meter, electrical indicating . . . . . . . . . . . .RA 226 . . . . . . . . . . . .1.0 uCi . . . . . . . . . ...6625-00-226-5679
Meter, signal level . . . . . . . . . . . . . . . . . .. RA 226 . . . . . . . . . . .. 0.6 uCi . . . . . . . . . ...6625-00-226-5680
Radiation Hazard Information: The following radiation hazard information must be read and
understood by all personnel before operating or repairing Radio Sets AN/GRC-106 and AN/GRC106A. Hazardous radioactive materials are present in the above listed components of the AM3349/GRC-106, RT-662/GRC, and RT-834/GRC.
The components are potentially hazardous when broken. See qualified medical personnel and the
local Radiological Protection Officer (RPO) immediately, if you are exposed to or cut by broken components. First aid instructions are contained in TB 43-0116, TB 43-0122, and AR 385-11.
NEVER place radioactive components in your pocket.
Use extreme care NOT to break radioactive components while handling them.
NEVER remove radioactive components from cartons until you are ready to use them
If any of these components are broken, notify the local RPO immediately.
The RPO will survey the immediate area for radiological contamination and will supervise the
removal of broken components.
The above listed radioactive components will NOT be repaired or disassembled.
Change
1
B
TM 11-5820-520-2
FIXED OPERATION WITH L0NG RANGE ANTENNAS
WARNING
TELESCOPING ANTENNA
TYPICAL TOWER
EXTENDED RANGE
MAST
DOUBLET ANTENNA
ANTENNA
NEVER ERECT THESE LONG RANGE ANTENNAS DIRECTLY UNDER POWER LINES.
IF YOU MUST ERECT THESE LONG RANGE ANTENNAS NEAR POWER LINES, POWERLINE POLES OR
TOWERS, OR BUILDINGS WITH OVERHEAD POWERLINE CONNECTIONS, NEVER PUT THE ANTENNA
CLOSER THAN TWO TIMES THE ANTENNA HEIGHT FROM THE BASE OF THE POWERLINE, POLE,
TOWER OR BUILDINGS, 100 FEET AWAY IS A GOOD SAFE ROUND NUMBER TO REMEMBER,
NEVER ATTEMPT TO ERECT ANY LONG RANGE ANTENNA WITHOUT A FULL TEAM.
BEFORE ERECTING ANY LONG RANGE ANTENNA, INSPECT ALL THE PARTS MAKING UP THE
ANTENNA KIT. DO NOT ERECT THE ANTENNA IF ANY PARTS ARE MISSING OR DAMAGED.
DO AS MUCH OF THE ASSEMBLY WORK AS POSSIBLE ON THE GROUND.
WHEN ERECTING THE ANTENNA, ALLOW ONLY TEAM PERSONNEL IN THE ERECTION AREA.
MAKE SURE THAT THE AREA FOR THE ANCHORS IS FIRM.
IF THE GROUND IS MARSHY OR SANDY,
GET
SUPERVISOR
SPECIFIC
INSTRUCTIONS
FROM
YOUR
CREW
CHIEF
OR
ON
HOW
TO
REINFORCE
THE ANCHORS,
WHEN SELECTING LOCATIONS FOR ANCHORS, AVOID TRAVELED AREAS AND ROADS. IF YOU CANN
AVOID THESE AREAS, GET SPECIFIC INSTRUCTIONS FROM YOUR SUPERVISOR AS TO WHAT CLEAR
ANCE YOUR GUY WIRES AND ROPES MUST HAVE OVER THE TRAVELED AREAS AND ROAD.
CLEARLY MARK ALL GUY WIRES AND ROPES WITH THE WARNING FLAGS OR SIGNS SUPPLIED BY YOUR
UNIT.
IN AN EMERGENCY, USE STRIPS OF WHITE CLOTH AS WARNING STREAMERS.
IF YOU SUSPECT THAT POWERLINES HAVE MADE ACCIDENTAL CONTACT WITH YOUR ANTENNA, ST
OPERATING, ROPE OFF THE ANTENNA AREA, AND NOTIFY YOUR SUPERIORS.
IF THE WEATHER IN YOUR AREA CAN CAUSE ICE TO FORM ON YOUR LONG RANGE ANTENNA AND ITS
GUY WIRES AND ROPES, ADD EXTRA GUYS TO SUPPORT THE SYSTEM. ROPE OFF THE AREA AND
POST IT WITH WARNING SIGNS LIKE BEWARE OF FALLING ICE.
DO NOT TRY TO ERECT ANY ANTENNA
KEEP
A
SHARP
EYE
ON
YOUR
DURING
ANCHORS
AND
AN
ELECTRICAL
GUYS.
CHECK
STORM.
THEM
DAILY
AND
IMMEDIATELY
BEFORE AND AFTER BAD WEATHER.
Change
1
C
TM 11-5820-520-20
WARNING
SERIOUS INJURY OR EVEN DEATH CAN HAPPEN IF T H E F O L L O W I N G
ARE NOT CAREFULLY OBSERVED WHEN INSTALLING AND USING
THE ANTENNAS USED WITH YOUR RADIO SETS.
1. ARE THERE ANY POWERLINES IN YOUR AREA OF OPERATION?
2. HOW HIGH ARE THESE POWERLINES?
3. HOW TALL ARE THE POLES OR TOWERS CARRYING POWERLINES?
MOBILE OPERATION WITH WHIP ANTENNAS
DO NOT STOP YOUR VEHICLE UNDER POWER LINES.
● IF P O S S I B L E , T R Y T O M A I N T A I N M O B I L E C O M M U N I C A T I O N S W I T H
YOUR ANTENNA(S) TIED DOWN.
● MAKE SURE AN ANTENNA TIP CAP IS SECURELY TAPED ON THE
END OF EACH WHIP ANTENNA,
● DO NOT LEAN AGAINST OR TOUCH A WHIP ANTENNA WHILE THE
TRANSMITTER IS ON.
● DURING CROSS-COUNTRY OPERATION, DO NOT ALLOW ANYONE
TO STICK AN ARM, LEG OR WEAPON OVER THE SIDES OF THE
VEHICLE,
IF YOUR ANTENNA ACCIDENTALLY TOUCHES A
POWERLINE AND A LEG, ARM OR WEAPON CONTACTS A DAMP
BUSH OR THE GROUND, A SERIOUS OR FATAL ACCIDENT CAN
HAPPEN.
● IF YOU ARE NOT SURE THAT AN ANTENNA ON YOUR VEHICLE
WILL CLEAR A POWERLINE, STOP BEFORE YOU GET CLOSE
TO THE POWERLINE AND EITHER CAREFULLY TIE DOWN THE
ANTENNA OR REMOVE ANTENNA SECTIONS TO MAKE SURE
THAT YOU CAN SAFELY DRIVE UNDER THE POWERLINE.
Change 1 D
-
TM 11-5820-520-20
SAFETY STEPS TO FOLLOW IF SOMEONE
IS THE VICTIM OF ELECTRICAL SHOCK
DO NOT TRY TO PULL OR GRAB THE INDIVIDUAL
IF POSSIBLE, TURN OFF THE ELECTRICAL POWER
IF YOU CANNOT TURN OFF THE ELECTRICAL
POWER, PULL, PUSH, OR LIFT THE PERSON TO
SAFETY USING A DRY WOODEN POLE OR A DRY
ROPE OR SOME OTHER INSULATING MATERIAL
SEND FOR HELP AS SOON AS POSSIBLE
AFTER THE INJURED PERSON IS FREE OF
CONTACT WITH THE SOURCE OF ELECTRICAL
SHOCK, MOVE THE PERSON A SHORT DISTANCE
AWAY AND IMMEDIATELY START ARTIFICIAL
RESUSCITATION
Change 1
E/(F blank)
*TM 11-5820-520-20
TECHNICAL
HEADQUARTERS
DEPARTMENT OF THE ARMY
WASHINGTON, DC, 22 November 1982
MANUAL
No. 11-5820-520-20
ORGANIZATIONAL MAINTENANCE MANUAL
RADIO SETS
AN/GRC-106 (NSN 5820-00-402-2263)
AND
AN/GRC-106A (NSN 5820-00-223-7548)
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve this manual. if you find any mistakes or if yaw know
of a way to improve the procedures, please let us know. Mail your letter,
DA Form 2028 (Recommended Changes to Publications and Blank Forms),
or DA Form 2028-2 Iocated in the back of this manual direct to:
Commander, Communications-Electronics Commandand Fort Monmouth,
ATTN: AMSEL-LC-ME-PS, Fort Monmouth, New Jersey 07703-5000. In
either case, a reply will be furnished direct to you.
CHAPTER 1
Section I
II
III
CHAPTER 2
Section I
II
III
PAGE
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Equipment Description and Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Technical Principles of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
MAINTENANCE INSTRUCTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-0
Repair Parts, Special Tools, and Support Equipment . . . . . . . . . . . . . . . 2-1
Service Upon Receipt
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
IV
Preventive Maintenance Check and Services (PMCS) . . . . . . . . . 2-2
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
V
Maintence Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19
VI
Preparation for Storage and Shipment . . . . . . . . . . . . . . . . . . . . . . . . ..2-24
APPENDIX A
APPENDIX B
APPENDIX C
GLOSSARY
INDEX
REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Maintenance Allocation CHART (MAC) . . . . . . . . . . . . . . . . . . . . . B-1
EXPENDABLE SUPPLIES AND MATERIALS LIST . . . . . . . . . . . . . . . . . . C-1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glossary
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1
*This manual supersedes the Organizational Maintenance portion of TM 11-5820-520-12,
February 1971, including all changes.
Change 1 i
TM 11-5820-520-20
RADIO SET AN/GRC-106
1-0
Change 1
TM 11-5820-520-20
CHAPTER 1
INTRODUCTION
Section I. GENERAL INFORMATION
1-1.
SCOPE
●
TYPE OF MANUAL: Organizational Maintenance.
●
MODEL NUMBER AND EQUIPMENT NAME: AN/G RC-106(*) Radio Sets.
Nomenclature followed by (*) indicates model of Radio Sets referenced in this manual. Radio
Set AN/GRC-106(*) represents sets AN/GRC-106 and AN/GRC-106A.
●
PURPOSE OF EQUIPMENT: The AN/G RC-106(*) is primarily intended for use as a mobile
radio link in a communications network. However, it can be used in a fixed mobile station.
1-2. MAINTENANCE FORMS, RECORDS, AND REPORTS
CONSOLIDATED INDEX OF ARMY PUBLICATIONS AND BLANK FORMS
Refer to the latest issue of DA PAM 25-30 to determine whether there are new editions, changes or additional
publications pertaining to the equipment.
REPORTS OF MAINTENANCE AND EQUIPMENT STATUS
Reports of Maintenance and Unsatisfactory Equipment. Department of the Army forms and
procedures used for equipment maintenance will be those prescribed by DA PAM 738-750 as contained in
Maintenance Management Update.
Reporting of Item and Packaging Discrepancies. Fill out and forward SF 364 (Report of
Discrepancy (ROD)) es prescribed in AR 735-11-2/DLAR 4140.55/SECNAVlNST 4355.18/AFR 400-54/MCO
4430.3J.
Transportation Discrepancy Report (TDR) (SF 361). Fill out and forward Transportation
Discrepancy Report (TDR) (SF 361) as prescribed in AR 55-38/NAVSUPlNST 4610.33C/AFR 75-18/MCO
P4610.19D/DLAR 4500.15.
1-3. DESTRUCTION OF ARMY ELECTRONICS MATERIEL TO PREVENT ENEMY USE
Destruction of Army electronics materiel to prevent enemy use shall be in accordance with TM 750-244-2.
1-4. PREPARATION FOR STORAGE AND SHIPMENT
Refer to Chapter 2, Section VII of this manual.
1-5. NOMENCLATURE CROSS-REFERENCE LIST
COMMON NAME
NOMENCLATURE
Radio Set . . . . . . . . . . . . . . . . . . . . . . . AN/GRC-106(*)
RT . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver-Transmitter, Radio RT-662/GRC
or RT-834/GRC
Amplifier . . . . . . . . . . . . . . . . . . . . . . . Amplifier, Radio Frequency AM-3349/GRC-106
Remount . . . . . . . . . . . . . . . . . . . . . . . Mounting MT-3140/GRC-106
Telegraph Key . . . . . . . . . . . . . . . . . . . Key, Telegraph KY-116/U
Loudspeaker . . . . . . . . . . . . . . . . . . . . Dynamic Loudspeaker LS-166/U
Headset . . . . . . . . . . . . . . . . . . . . . . . . Headset, Electrical H-227/U
Handset . . . . . . . . . . . . . . . . . . . . . . . Handset H-33(*)/PT
Microphone . . . . . . . . . . . . . . . . . . . . Microphone, Carbon M-29B/U
Change 1 1-1
TM 11-5820-520-20
COMMON NAME
NOMENCLATURE
Whip Antenna . . . . . . . . . . . . . . . . . . . Antenna Elements: 3 Mast Sections MS-116A;
Mast Section MS-117A; Mast Section MS-118A;
Mast Base AB-6521GR; Antenna Bag CW-206/GR;
Antenna Cover; Rope (20 feet); Adapter, Connector UG-306/U; Antenna Sheath Clamp, Brass
Doublet Antenna . . . . . . . . . . . . . . . . . Antenna Group AN/GRA-50
NOTE
If either component of the radio set requires repair,
turn in both the amplifier and receiver/transmitter.
1-6. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR’s)
If your equipment needs improvement, let us know. Send us an EIR. You, the user, are the only one who can tell
us what you don’t like about your equipment. Let us know what you don’t like about the design or performance. Put it
on SF 368 (Product Quality Deficiency Report). Mail it to: Commander, U.S. Army Communications-Electronics
Command and fort Monmouth, ATTN: AMSEL-PA-MA-D, Fort Monmouth, New Jersey 07703-5000. We’ll send you a
reply.
Section II. EQUIPMENT DESCRIPTION AND DATA
1-7. EQUIPMENT CHARACTERISTICS, CAPABILITIES AND FEATURES
Refer to operator’s manual.
1-8. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
Refer to operator’s manual.
1.9. DIFFERENCES BETWEEN MODELS
Refer to operator’s manual.
1-10. EQUIPMENT DATA
Refer to operator’s manual.
1-11. SAFETY, CARE AND HANDLING
Observe all WARNINGS, CAUTIONS and NOTES in this manual. This equipment can be extremely dangerous if these instructions are not followed.
Section III. TECHNICAL PRINCIPLES OF OPERATION
1-12. TECHNICAL PRINCIPLES OF OPERATION
The AN/GRC-106(*) transmits upper sideband (usb), usb compatible amplitude-modulated (am)
and continuous wave (CW) signals; it can also transmit frequency-shift keyed (fsk) and narrow
frequency-shift keyed (risk) signals when the appropriate teletypewriter equipment is used. The
AN/G RC-106(*) receives usb, usb compatible am, cw and conventional double-sideband am
signals; it can also receive fsk and nsk signals when the appropriate teletypewriter equipment is
used. See Figure 1-1 for a simplified equipment application diagram of the AN/G RC-106(*). Refer
to operator’s manual.
1-2
Change 1
TM 11-5820-520-20
FIGURE 1-1. RADIO SETS AN/GRC-108(*): SIMPLIFIED PRINCIPLES OF OPERATION.
1
Voice, cw and code signals are applied to TRANSMITTER PORTION of RT unit, where they
are modulated and converted into a Radio Frequency (RF) signal.
2
This RF signal is applied to POWER AMPLIFIER PORTION of Amplifier, where its level is
raised to a nominal 400 watts peak envelope power (pep).
3
It is then applied to ANTENNA COUPLER PORTION, where it is sent through switching and
impedance-matching circuits for transmission. The ANTENNA COUPLER PORTION matches
the 15-FOOT WHIP ANTENNA or ANTENNA GROUP AN/G RA-50 to POWER AMPLIFIER
PORTION to ensure proper power transfer.
4
All incoming signals are received by the ANTENNA SWITCHING PORTION of Amplifier,
5
. . . and applied to RT RECEIVER PORTION.
6
Usb, usb compatible am, cw and conventional double-sideband am signals are converted into Intermediate Frequency (IF) signals for monitoring by HEADSET H-227/U, HANDSET
H-33(*)/PT or LOUDSPEAKER LS-166/U.
7
Fsk or nsk signals are also converted into IF signals and applied to RADIO
TELETYPEWRITER TERMINAL EQUIPMENT for transferal to page printers or tape punches
for message interpretation.
1-3
CHAPTER 2
MAINTENANCE INSTRUCTIONS
PAGE
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Disassembly, equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
PMCS Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Preventive maintenance checks and services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Removal, equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Repacking for storage or shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Repairs and replacements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Replacements, repairs and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Service upon receipt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Troubleshooting Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-9
TM 11-5820-520-20
Section I. REPAIR PARTS, SPECIAL TOOLS AND SUPPORT EQUIPMENT
2-1. TOOLS AND TEST EQUIPMENT
Tools and test equipment required for organizational maintenance of AN/GRC-106(*) are listed
in the Maintenance Allocation Chart (MAC) in Appendix B of this manual.
2-2. SPECIAL TOOLS, TMDE AND SUPPORT EQUIPMENT
There are no special tools or TMDE required for this equipment.
Section II. SERVICE UPON RECEIPT
2-3. REPAIR PARTS
See TM 11-5620-520-20 P-1, TM 11-5820-520-20 P-2.
2.4. UNPACKING AN/GRC.106(*)
CAUTION
When cutting wire strips on containers, be careful not to damage contents.
ITEM
1, Carton
ACTION
REMARKS
Use tin shears or diagonal cutting
pliers to cut and fold back metal
straps.
Cut tape on carton and fold back
flaps.
2. AN/GRC-106(*)
Remove from carton and take off
any packing material.
Inspect for damage done during
shipment.
Report any damage on an SF 364
(Report of Discrepancy (ROD)).
Compare with packing list,
Be sure shipment is complete. Report
any differences according to
instructions in DA PAM 738-750.
Check for modifications.
Check on front panel near
nomenclature plate for any
modification work order (MWO)
numbers. They will appear ONLY if
the unit has been used or
reconditioned. Current MWO's which
apply to AN/GRC-106(*) are listed in
DA PAM 750-10. Apply all URGENT
MWO's. Schedule all NORMAL
MWO's.
2-1
TM 11-5820-520-20
SECTION III. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
2-4. GENERAL
The following information is for MONTHLY preventive maintenance checks and serices (PMCS) of
AN/GRC-106(*). Monthly PMCS should be performed every 30 days of 8 - hour - per - day operation. If the
equipment is operated 16 hours - per - day check it at 15 - day intervals. Monthly PMCS should be done if
AN/GRC-106(*) is in standby (ready for immediate operation) condition but is not needed if the equipment
is in limited storage. Maintenance forms and records to be used and maintained on this equipment are
specified in DA PAM 738 - 750. Perform all checks and services in sequence listed in Table 2-1.
a. Tools, Test Equipment and Material needed for Organizational level PMCS.
Tools you will need for PMCS on AN/GRC-106(*) are in Tool Kit, Electronic Equipment
TK 101/G (SC 5180-91-CL-R13).
● Required
test equipment: Multi meter, AN/PSM-45
• Required Material: Cement, RTV 112 (Rem 5. Appendix C)
Cleaning cloth (Item 2, Appendix C)
Silicone compound (Item 3, Appendix C)
Trichlorotrifluoroethane (Item 1, Appendix C)
●
Fumes of TRICHLOROTRIFLUOROETHANE are poisonous. Provide adequate ventilation whenever you use TRICHLOROTRIFLUOROETHANE. Do
not use solvent near heat or open flame. TRICHLOROTRIFLUOROETHANE
will not burn, but heat changes the gas into poisonous, irritating fumes. DO
NOT breathe the fumes or vapors. TRICHLOROTRIFLUOROETHANE
dissolves natural skin oils. DO NOT get the solvent on your skin. Use
gloves, sleeves and an apron which the solvent cannot penetrate. If the solvent is taken internally, see a doctor immediately.
b. Routine Services
Routine services are a collection of checks and observations performed by the operator at all
times. Routine services are not listed in the preventive maintenance checks and services table, in
order to separate the nonoperational from the operational services.
You should perform the following routines as necessary:
Clean
Dust
● Wash
● Check for cut or frayed cables
● Check for dented, bent, or broken
components
● Check for rusting
●
●
●
Service the following items:
●
2-2
Check controls for smooth operation
Cover unused receptacles
● Check for loose nuts, bolts, and
connectors
● Check for completeness of equipment
●
Radio antennas and elements
Change 1
TM 11-5820-520-20
DA FORM 2404, EQUIPMENT INSPECTION AND MAINTENANCE WORKSHEET.
NOTE
Local command SOP should provide instructions on how to complete DA
FORM 2404 in accordance with command policy. In addition TM 38-750
(TAMMS) provides information needed for completion of this form.
2-3
TM 11-5820-520-20
TABLE 2-1.
MONTHLY PMCS TABLE
paragraph 2-9.
paragraph 2-7.
2-4
TM 11-5820-520-20
Table 2.1. MONTHLY PMCS TABLE. Continued
ITEM
NO.
3
ITEM
TO BE
INSPECTED
PROCEDURES
Mast Base
AB-652/GRC
Inspect to ensure that there are no bums or cracks and operator
maintenance has been performed. Refer to paragraph 2-9.
NOTE
Operational checks are to be conducted in accordance with
local command Standard Operating Procedures (SOP).
NOTE
If any portion of your radio set fails to operate, refer to Chapter 2,
Section IV (Troubleshooting) for possible problems.
Report any malfunctions or failures on the proper DA
Form 2404 or refer to TM 38-750.
2-5
TM 11-5820-520-20
SECTION IV. TROUBLESHOOTING
2-5. GENERAL
Troubleshooting at the Organizational Maintenance level requires you to locate any trouble
as quickly as possible.
● Once trouble is located, repair or replace the part if you are authorized to do so or determine
if a higher category of maintenance is required. Repairs by Organizational Maintenance are
limited by tools, test equipment and replacement parts allocated to that level.
●
NOTE
Before using Troubleshooting Table (Table 2-2). check your work order and
talk to the Operator, if possible, for a description of symptoms if trouble occurred while equipment was in operation.
Troubleshooting Table (Table 2-2)
Table 2-2 lists common problems that may occur during operation or
maintenance of AN/GRC-106(*).
● Follow these steps to use Table 2-2:
1. Find the problem under MALFUNCTION.
2. Check for possible causes of the problem under TEST OR INSPECTION.
3. Use the procedures under CORRECTIVE ACTION to correct the problem.
●
. This manual cannot list all trouble that may occur, nor everything to check, nor all possible
procedures to correct troubles listed. If trouble is not listed in Table 2-2 or is not corrected
by the procedures under CORRECTIVE ACTION, notify your supervisor.
2-6
TM 11-5820-520-20
Table 2-2 TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Blower motors do not energize.
Step 1. Check for defect in CX-10071/U or CX-1009/U cables by setting the PRIM. PWR.
switch to OFF, then immediately back to ON. You should hear the blower motors.
If you do not hear them, see if signal level meter pointer on the RT is all the way
to the right.
If pointer is not all the way to the right, higher category of maintenance required.
Step 2. Check for defect in RT or for low voltage circuit breaker (PRIM. PWR. switch) drop
out by first checking to see if signal level meter pointer is all the way to the right.
If it is, disconnect CX-10071/U from PRIM. POWER connector (para 2-8). Use
Multimeter AN/PSM-45 to check for 27 volts dc between pins A or B (+) and C
or D(-) on CX-10071/U connector. If 27 volts dc is not present, replace CX-10071/U.
Change 1
2-7
TM 11-5820-520-20
Table 2-2. TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
CAUTION
Do not damage CX-10099/U in any way. Disconnect both ends of CX-10099/U
to make a continuity check. Both ends of the cable must be removed
together to prevent damage to the cable. Installations that use CX-1106(*)/G
will not have this problem.
If 27 volts is present, disconnect CX-10099/U (para 2-8) and use Multimeter
AN/PSM-45 to check continuity between pins N and A, N and D.
If there is continuity, replace CX-10099/U.
2-8
Change 1
TM 11-5820-520-20
Table 2-2. TROUBLESHOOTING Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
If continuity does not exist, use Multimeter AN/PSM-45 to check continuity
at pin N on both ends of CX-10099/U connectors.
If continuity exists there, higher category of maintenance required.
If there is no continuity there, replace defective CX-10099/U and reconnect CX10071/U to PRIM. POWER connector.
2. When TEST METER selector switch is set to PRIM. VOLT, TEST METER pointer does not move
into dark green top scale.
Check for defect in amplifier by making sure blower motors are working.
If they are working, higher category of maintenance required.
If they are not working, turn PRIM. PWR. switch to OFF, then immediately back
to ON. If blower motors still do not work or the pointer does not move into dark
green scale, higher category of maintenance required.
Change 1
2-9
TM 11-5820-520-20
Table 2-2. TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. When TEST METER selector switch is set at LOW VOLT, TEST METER pointer does not move into
dark green top scale.
CAUTION
The amplifier HV RESET switch should not stay in TUNE position for
longer than 2 minutes. If more than 2 minutes are needed, turn amplifier
HV RESET switch to OPERATE and RT SERVICE SELECTOR switch to
STAND BY for 5 minutes cooling. After 5 minutes cooling, turn RT SERVICE SELECTOR switch back to SSB NSK and amplifier HV RESET
switch back to TUNE.
Step 1. Check for high voltage (HV RESET switch) drop out by turning HV RESET switch
to OPERATE. Wait 30 seconds and set switch to TUNE. TEST METER pointer
should move into dark green top scale.
If pointer does not move into top scale, higher category of maintenance required.
2-10
.
TM 11-5820-520-20
Table 2-2. TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2. Check for defect in CX-10099/U cable by first disconnecting it from CONTROL and
PA CONTROL connectors (para 2-8).
Use Multi meter AN/PSM-45 to check continuity of all pins of the connector on each end of CX-10099/U, Check pins of corresponding letters
together (pin A with pin A, pin B with pin B, etc.).
If there is continuity at all pins, higher category of maintenance required.
If any connection is open, replace CX-10099/U and reconnect it to, CONTROL
and PA CONTROL connectors.
4. When TEST METER selector switch is set to HIGH VOLT, TEST METER pointer does not move
into dark green top scale.
This indicates defective amplifier AM-3349/GRC-106.
Higher category of maintenance is required.
Change 1
2-11
TM 11-5820-520-20
Table 2-2. TROUBLESHOOTING . Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. When ANT. TUNE and ANT. LOAD controls are adjusted, ANT. LOAD meter pointer does not
move.
Step 1.
2-12
Check for defect in CX-1017/U or CG-409H/U cables by first setting TEST METER
switch to GRID DRIVE. TEST METER pointer should move just to the left of the
gray bottom scale.
TM 11-5820-520-20
Table 2-2. TROUBLESHOOTING . Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Use extreme care when disconnecting CX-10171/U or when working near
antenna. RF voltages as high as 10,000 volts exist at WHIP connector and
on the antenna. Set RT SERVICE SELECTOR switch to OFF.
If the pointer moves to the left of the bottom scale, disconnect antenna lead
(CX-10171/U) from WHIP connector.
Use Multimeter AN/PSM-45 to check CX-10171/U for continuity to Mast Base
AB-652/GR and for shorts to vehicle body.
If CX-10171/U show continuity and is not shorted, be sure antenna is installed
properly. If antenna is working properly, reconnect CX-10171/U to WHIP
connector. Higher category of maintenance required.
Step 2. If TEST METER pointer does not move with TEST METER switch set at GRID
DRIVE, check signal level meter indication on RT. Signal level meter pointer
should be in the upper three-quarters of the scale.
Change 1
2-13
TM 11-5820-520-20
Table 2-2. TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
If it is not, a higher category of maintenance required.
If it is in the upper part of the scale, disconnect CG-409H/U from both RF
DRIVE connectors (para 2-8).
Use Multimeter AN/PSM-45 to check for continuity and shorts. If there
is continuity in CG-409H/U, set TEST METER selector switch to DRIVER CUR.
TEST METER pointer should move into dark green top scale.
If pointer does not move into top scale. higher category of maintenance
required.
Reconnect CG-409H/U to both RF DRIVE connectors.
2-14
Change 1
TM 11-5820-520-20
Table 2-2. TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. When TEST METER selector switch is set at DRIVER CUR., PA CUR. or POWER OUT,
TEST METER pointer does not move into dark green top scale.
Step 1. Turn HV RESET switch to TUNE, wait 60 seconds, and turn back to OPERATE,
Step 2. If TEST METER pointer does not move into green area, higher maintenance
is required.
7. Signal level meter pointer is not all the way to the right.
Step 1. Check for defect in RT or in CX-10071/U by disconnecting CX-10071/U from POWER
connector (para 2-8).
Step 2. Use Multimeter AN/PSM-45 to check for 27 volts dc between pins A or B and C or D
of cable connector. Refer to Malfunction 1, Step 2 for test set-up.
If 27 volts dc is absent, replace CX-10071/U.
If 27 volts dc is present, higher category of maintenance required.
6. Unable to receive.
Step 1. Check for defect in CG-409H/U cable, handset, loudspeaker, or headset by first
disconnecting CG-409H/U from RECEIVER IN connector. Connect a coaxial cable
from FREQ STD connector to RECEIVER IN connector.
Change 1
2-15
TM
11-5820-520-20
Table 2-2. TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE
ACTION
NOTE
When receiving with Amplifier PRIM. PWR. switch at ON, RT will be in
TRANSMIT unless HV RESET switch is set to OPERATE.
Step 2. Set RT-662/GRC MC and KC controls to 04998 or RT-834/GRC MHz,
KHz and 100 Hz controls to 049980.
Step 3. Turn AUDIO GAIN control all the way to the right.
Step 4. Listen for a 2-kHz tone in the audio accessory.
If You hear a 2-kHz tone, disconnect CG-409H/U from RCVR ANT. connector (para 2-8)
Use Multimeter AN/PSM-45 to check CG-409H/U for continuity or
shorts. Refer to Malfunction 5, Step 2 for test set-up.
If CG-409H/U shows no continuity or is shorted, replace it.
If CG-409H/U is not defective, use Multi meter AN/PSM-45 to check continuity between WHIP and RCVR ANT. connectors (see figure).
2-16
Change 1
TM 11-5820-520-20
Table 2-2. TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
If there is no continuity, higher category of maintenance required.
If you do not hear the 2-kHz tone, check for defective loudspeaker, handset and headset.
If you still do not hear the 2-kHz tone, higher category of maintenance required.
Disconnect coaxial cable from RECEIVER IN and FREQ STD connectors
and reconnect CG-409H/U to Receiver IN and RCVR ANT. connectors.
9. Unable to transmit
Step 1. Check for defect in telegraph key, handset, or headset by first setting
RT SERVICE SELECTOR switch to CW, then keying radio set.
Signal level meter pointer should move slightly upscale.
If the pointer does not move, replace keying device.
If this replacement does not solve the problem, higher category of
maintenance required.
Step 2. If the pointer moves upscale, set amplifier TEST METER selector switch to
POWER OUT. Key the radio set; TEST METER pointer should move into dark green
top scale.
2-17
TM 11-5820-520-20
Table 2.2. TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
If the pointer moves into the top scale, the receiver at the remote station is
defective.
If the pointer moves into the gray bottom scale to the left of the top
scale, set TEST METER switch to GRID DRIVE. Key the radio set; TEST METER
pointer should now move into dark green top scale.
If the pointer moves into the top scale, the receiver at the remote station is
defective.
If TEST METER pointer moves to right of top scale, set TEST METER
selector switch to PA CUR. Key the radio set; TEST METER
pointer should now move to at Ieast the start of the gray bottom scale.
If none of the above procedures solve the problem, higher category of
maintenance required.
2-18
TM 11-5820-520-20
SECTION V. MAINTENANCE PROCEDURES
2-6. GENERAL
Organizational Maintenance of Radio Sets AN/GRC-106(*) is limited to:
1. INSPECTION
● Antenna.
● Mounting bases.
● Installed items.
● Accessible
pluckout items.
2. REMOVAL
● Whip antenna mast sections.
● Cables.
3. CLEANING
● Mast Base AB-652/GR.
● Heat exchanger assembly.
4. REPAIRS AND REPLACEMENTS
● Whip antenna mast sections.
● Front
panel controls.
5. PRESERVATION
● Metal
surfaces.
2-7.
INSPECTION
ANTENNA. Be sure none of the whip sections are bent or damaged.
MOUNTING BASES. Be sure mountings are stable and secure. Check for loose or missing
hardware.
● INSTALLED ITEMS. Be sure all equipment is properly installed. Check for proper positioning
and tightening of all nuts, bolts and washers.
• ACCESSIBLE PLUCKOUT ITEMS. Check seating of all lamps and fuses and position them
properly if necessary.
●
●
2-6. REMOVAL
a. Whip Antenna Mast Sections
During removal, disassembly, erection, assembly or repair of the whip
antenna, follow all safety requirements in TB 43-0129. Injury or DEATH
could result by failing to follow safe practices. Be sure all equipment is
turned OFF.
1. Remove antenna sheath clamp.
2. Remove antenna cover.
3. Unscrew the bottom MS-116A from Mast Base AB-652/GR.
4. Disassemble the four mast sections by unscrewing them.
Change 1
2-19
TM 11-5820-520-20
b. Cables
CAUTION
Do not pull on the cables themselves hold the
connectors when pulling cables from their sockets.
1. CX-10171/U Remove CX-10171/U from the whip antenna by turning the binding post to the
left and pulling CX-10171/U out of the slot in the binding post. Remove CX-10171/U from the
amplifier by unscrewing the connector and pulling it straight out of the WHIP connector.
2. CX-10071/U. Remove the two battery lugs on each CX-10071/U cable from the vehicle storage
battery terminals. To remove CX-10071/U from the PRIM. POWER connector on amplifier or the
POWER connector on the RT unit, pry up the screw handle on the cable connector and turn it
to the left until CX-10071/U is free from the power connectors.
2-20
TM 11-5820-520-20
3. CX-1009/U. Remove CX-1009/U from the amplifier CONTROL connector and the RT unit PA
CONTROL connector by prying up the screw handle on the cable connector and turning it to
the left until CX-10099/U is free from the control connectors.
4. Bonding Jumper. Remove the end of the jumper from the vehicle chassis (see figure, below
left). Remove the other end from amplifier binding post by pushing in on the post and pulling the cable free (see figure, below right).
5. CG-409H/U. Remove CG-409H/U from amplifier RF DRIVE and RCVR ANT. connectors and RT
unit RF DRIVE and RECEIVER IN connectors by depressing the coaxial connector on the
CG-409H/U and turning it to the left. When it is loose, pull the coaxial connector straight out
from the front panel connectors.
2-21
TM 11-5820-520-20
2-9. CLEANING
Fumes of TRICHLOROTRIFLUOROETHANE are poisonous. Provide adequate ventilation whenever you use TRICHLOROTRIFLUOROETHANE. Do
not use solvent near heat or open flame. TRICHLOROTRIFLUOROETHANE
will not burn, but heat changes the gas into poisonous, irritating fumes. DO
NOT breathe the fumes or vapors. TRICHLOROTRIFLUOROETHANE
dissolves natural skin oils. DO NOT get the solvent on your skin. Use
gloves, sleeves and an apron which the solvent cannot penetrate. If the solvent is taken internally, see a doctor immediately.
a. Mast Base AB-652/GR
Disassemble mast base (using a suitable crescent wrench) to check for any entry of water.
Clean with a wire brush and trichlorotrifluoroethane (Item 1, Appendix C). Coat exterior parts
with a light film of silicone compound. If necessary, replace washer (NSN 5999-00-264-9213)
which is used to cover the antenna support when the mast sections are removed.
b. Amplifier Blower
NOTE
The amplifier blower is watertight and
isolated from all other components of
amplifier. Water will pass through the
amplifier blower assembly without
damaging any other chassis components.
To clean the amplifier blower, you do not have to remove the chassis. Turn the amplifier with
its left side (as viewed from the front panel) up and flush out the assembly grillwork with water.
2-10. REPAIRS AND REPLACEMENTS
a. Whip Antenna Moat Sections
Follow all safety requirements in TB SIG 291 during removal, disassembly,
replacement or assembly of the whip antenna. Injury or DEATH could result
by failing to follow safe practices. Be sure all equipment is turned OFF.
1.
2.
3.
4.
Replace any defective mast sections with a spare of the same type.
Screw two MS-116A’s, the MS-117A and the MS-118A together.
Screw the remaining MS-116A into Mast Base AB-652/GR.
Slide the antenna cover over the MS-116A attached to AB-652/GR. Secure the cover with the
antenna sheath clamp.
5. Screw the four assembled mast sections into the MS-116A attached to AB-652/GR.
2-22
TM 11-5820-520-20
b. Front Panel Controls
Replace all knobs, fuses, external screws, running spare items and external cables, when they
are cracked, broken, frayed, worn out or out of the groove.
2-11.
PRESERVATION
Whenever necessary:
NOTE
Be sure the chassis is tightly secured to the case
before performing the procedure below.
●
Remove rust and corrosion from metal surfaces by lightly sanding with fine sandpaper. Brush two thin coats of the proper paint on bare metal to protect it from
further corrosion. Refer to applicable procedures in TB 43-0118.
Change 1
2-23
TM 11-5820-520-20
SECTION VI. PREPARATION FOR STORAGE AND SHIPMENT
2-12. DISASSEMBLY OF EQUIPMENT
Use the procedures below when placing AN/GRC-106(*) in storage or moving it to a
different location.
a. Disconnecting Cables
●
●
Refer to paragraph 2-8b.
Disconnect any minor electrical component that may be connected to RT AUDIO
connectors.
b. Antenna Disassembly
●
●
Refer to paragraph 2-8a.
Remove Mast Base AB-652/GR from the vehicle. Refer to paragraph 2-9a.
c. Component Disassembly
Pull the release handles on RT Mount toward you while turning them toward the
outside of the unit.
● Lift amplifier off the RT or off of its own RT Mount.
● Lift RT off of RT Mount if necessary.
● Unscrew the two insulators (IN-104) from the left crossbar assembly.
● Remove crossbar assemblies from RT Mount by loosening the jamnuts and adjusting screws.
● Remove loudspeaker if it has been installed in the vehicle.
●
2-13. REPACKING FOR STORAGE OR SHIPMENT
a. AM-3349/GRC-106
● Fold a piece of corrugated cardboard (W5C, B-flute) to form a spring (shock) pad
for bottom of a corrugated cardboard carton. Set the spring pad in the carton.
● Place amplifier in carton (12 x 15 x 19 7/8 inches).
● Fold sheets of corrugated cardboard to form spring pads for the front, rear and
sides of amplifier and set them in place.
● Slide a sheet of corrugated (A/B) doublewall cardboard between the front spring
pad and carton wall.
● Fold a sheet of corrugated cardboard to form a spring pad for the top of
amplifier. Set it in place.
• Close the carton and seal it with water resistant tape (PPP-T-76, 3-inch).
b. RT-662/GRC OR RT-834/GRC
● Follow instructions in paragraph 2-13a above, using a 19 7/8 x 15 1/4 x 9 5/8 inch
corrugated cardboard carton.
2-24
TM 11-5820-520-20
c. Audio Accessories
Wrap handset and headset in grade A wrapping paper.
Wrap all audio accessories with flexible corrugated cardboard and tape these
wrappings.
● Place handset, telegraph key, and cable CX-1852/U in barrier bags.
● Fold sheets of flexible corrugated cardboard to form small containers for all
other accessories.
● Arrange the packaged accessories in the bottom of a 6 3/4 X 13 X 13 1/2 inch corrugated
cardboard carton.
● Fold a sheet of flexible corrugated cardboard to form a spring pad and set it in place.
● Close the carton and seal it with water-resistant tape (PPP-T-76, 2-inch).
●
●
d. Antenna Group AN/GRA-50
Place all small hardware in a 3 X 5 inch envelope.
Wrap all units in flexible corrugated cardboard and tape these wrappings.
● Arrange these packages in the bottom of a 6 5/8 X 14 1/2 X 14 1/2 inch corrugated cardboard carton.
● Fold a sheet of flexible corrugated cardboard to form a spring pad and set it in
place.
● Close the carton and seal it with water-resistant tape (PPP-T-76, 2-inch).
●
●
e. Whip Antenna Group
Place Adapter UG-201A/U, Adapter UG-306/U, the antenna sheath clamp, the five mast sections and the insulators in barrier bags.
● Arrange bags in the bottom of a 6318 x 10 1/2 x 49 1/2 inch corrugated cardboard carton.
● Fold flexible corrugated cardboard to form fillers as needed.
Ž Close the carton and seal it with water-resistant tape (PPP-T-76, 3-inch).
●
f. Cables
Coil the two CX-10071/U and the CX-10171/U. Place each in a clear bag.
Place each of the other cables in a barrier bag.
● Arrange cables in the bottom of a 8 1/2 X 11 3/8 X 13 3/8 inch corrugated cardboard carton.
● Fold flexible corrugated cardboard to form fillers where needed.
● Close the carton and seal it with water-resistant tape (PPP-T-76, 2-inch).
●
●
g. Mechanical installation Material
Place all small hardware in a 3 X 5 inch paper envelope.
Wrap the RT Mount and the two crossbar assemblies in flexible corrugated cardboard and
tape these wrappings. Use 3/4-inch masking tape.
• Arrange these packages in the bottom of a 5 1/2 X 14 7/8 X 19 5/8 inch corrugated cardboard
carton.
● Fold flexible corrugated cardboard to form fillers as needed.
• Close the carton and seal it with water-resistant tape (PPP-T-76, 3-inch).
●
●
2-25
TM 11-5820-520-20
h. Running Spare Parts
●
Place all small hardware in a 3 X 5 inch paper envelope.
• Place fuses and insulator in clear bags.
●
●
●
●
Wrap the two 1/2 X 9/16-inch wrenches with flexible corrugated cardboard and tape these
wrappings with 3/4-inch masking tape.
Arrange packages in the bottom of a carton.
Fold flexible corrugated cardboard to form fillers as needed.
Close the carton and seal it with water-resistant tape (PPP-T-76, 2-inch).
i. Manuals
• Place each manual in a barrier bag and seal the bags with 3/4-inch masking tape.
2-14. SHIPPING CRATE
. To store or ship the entire AN/GRC-106(*), use a 17 1/2 X 27 1/2 X 51 inch plywood crate
(nailed per PPP-B-621).
2-15. TYPES OF STORAGE
●
●
●
2-26
Short term (administrative) = 1 to 45 days. All equipment in administrative storage must be
able to be made ready within 24 hours for use on a mission. Before placing any item in administrative storage, perform the next scheduled PMCS and correct or repair any deficiencies
you find. The administrative storage site should provide required protection from extreme
weather conditions and allow you to reach the equipment for visual inspections or exercises
when applicable.
Intermediate = 46 to 180 days.
Long term or flyable = no time limit.
TM 11-5820-520-20
APPENDIX A
REFERENCES
A-1.
INTRODUCTION
Following is a list of all forms, technical bulletins, and technical manuals
referenced in this manual.
A-2. FORMS
Equipment Inspection and Maintenance Worksheet . . . . . . . . . . . . . . . . . DA Form 2404
Report of Discrepancy (ROD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Form SF 364
Quality Deficiency Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Form SF 368
Recommended Changes to Equipment Technical Manuals . . . . . . . . . . . . . . . . . DA Form 2028-2
Recommended Changes to Publications and Blank Forms. . . . . . . . . . . . . . . . . . . DA Form 2028
A-3. TECHNICAL BULLETINS
Field Instructions for Painting and Preserving Communications-Electronics
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 43-0118
Identification of Radioactive items in the Army Supply System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 430116
Instructions for Safe Handling and Identification of U.S. Army ElectronicsCommand Managed Radioactive Items in the Army Supply
System.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TB 43-0122
Safety Measures to be Observed When Installing and Using
Whip Antennas, Field-Type Masts, Towers, end Antennas, and
Metal Poles That are Used with communications, Radar, and
Direction Finder Equipment (TO-31 P5-1-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 43-0129
A-4. TECHNICAL MANUALS
Operator's and Organizational Maintenance Manual Suppressor, Electrical
Transient MX-7778/GRC (NSN 5915-00-937-9564) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 11-5915-223-12
Operator’s Manual: Radio Sets AN/GRC-106 (NSN 5820-00-402-2263)
and AN/GRC-106A (NSN 5820-00-223-7548) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 11-5820-520-10
Operator’s, Organizational, Direct Support, General Support,
and Depot Maintenance Manual: Antenna Group AN/GRA-50
(NSN 5985-00-892-0758) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . TM 11-5820-467-15
Organizational Maintenance Repair Parts and Special Tools
List: Radio Sets AN/GRC-106 (NSN 5820-00-402-2263) and
AN/GRC-106A (NSN 5820-00-223-7548) . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 11-5820-520-20P
Organizational Repair Parts and Special Tools List for Radio Set
AN/GRC-106 (NSN 5820-00-402-2263) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 11-5820-520-20P-1
Organizational Repair Parts and special Tools List for Radio Set
AN/GRC-106A (NSN 5820-00-223-7548) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 11-5820-520-20P-2
Operator's, Organizational, Direct Support and General Support
Maintenance Manual for Muitimeter, Digital AN/PSM-45 (NSN
6625-01-139-2512) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 11-6625-3052-14
Procedures for Destruction of Electronic Materiel to Prevent
Enemy Use (Electronics Command). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 750-244-2
A-5. MISCELLANEOUS PUBLICATIONS
consolidated Index of Army Publications and Forms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA PAM 25-30
Ionization and Radiation Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AR 385-11
Sets, Kits, and Outfits Component List : Tool Kit, Electronic
Equipment TK 101/G (NSN 5180-00464-5178) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SC 5180-91-CL-R13
The Army Maintenance Management System (TAMMS) . . . . . . . . . . . . . . . . . . . . . .DA
. PAM 738 750
US Army Equipment Index of Modification Work Orders. . . . . . . . . . . . . . . . . . . . DA PAM 750-10
Vehicular Radio Sets and Authorized installations . . . . . . . . . . . . . . . . . . . . . . . . . SB 11-131
Change 1
A-1/(A-2 blank)
TM 11-5820-520-20
APPENDIX B
MAINTENANCE ALLOCATION
Section I. INTRODUCTION
B-1. GENERAL INFORMATION
This appendix provides a summary of maintenance operations for AN/GRC-106(*). It authorizes
categories of maintenance for specific maintenance functions on repairable items and components, as well as tools and equipment needed to perform each function. Use this appendix as
an aid in planning maintenance operations.
B-2. MAINTENANCE FUNCTION
Maintenance functions will be limited to and defined as follows:
a. INSPECT. To visually examine an item and compare its physical, mechanical and/
or electrical characteristics with established standards in order to determine its
serviceability.
b. TEST. To measure mechanical or electrical characteristics of an item and compare those
characteristics with prescribed standards in order to verify serviceability.
c. SERVICE. Procedures required periodically to keep an item in proper operating condition, e.g., to clean (decontaminate), preserve, drain, paint, or to fill up fuel, lubrication,
hydraulic fluid, or compressed air supplies.
d. ADJUST. To set operating characteristics to the specified parameters and keep them
within their prescribed limits.
e. ALINE. To adjust specified variable elements of an item to bring about the best or
desired performance.
f. CALIBRATE. To correct test measuring and diagnostic equipment used in precision
measurements. Must compare two instruments, one of which is a certified standard of
known accuracy, to detect and adjust any differences in the accuracy of the instrument being compared.
g. INSTALL. To place, seat or fix into position an item, part or module (component or
assembly) to allow proper functioning of equipment or system.
h. REPLACE. To substitute a functioning like type part, subassembly or module (component or assembly) for its unserviceable counterpart.
i. REPAIR. To correct specific damage, fault, malfunction or failure in a part, subassembly,
module (component or assembly), end item or system by applying maintenance services (a-f,
h above) or other maintenance actions (welding, grinding, riveting, straightening, facing,
remachining or resurfacing).
j. OVERHAUL. The highest degree of maintenance applied to Army equipment. This function does not normally return an item to “like new” condition but restores it to completely
serviceable/operational conditions according to maintenance standards (i.e., DMWR) in ap
propriate technical publications.
k. REBUILD. The highest degree of materiel maintenance applied to Army equipment. To
restore unserviceable equipment to a “like new” condition according to original manufacturing standards. This function includes returning to zero those age measurements (hours,
miles, etc.) considered in classifying Army equipment/components.
B-1
TM 11-5820-520-20
B-3. COLUMN ENTRIES
a. COLUMN 1: GROUP NUMBER. Identifies components, assemblies, subassaemblies and
modules with next higher assembly.
b. COLUMN 2: COMPONENT ASSEMBLY. Lists the noun names of components,
assemblies, subassemblies and modules for which maintenance is authorized.
c. COLUMN 3: MAINTENANCE FUNCTION. Lists functions to be performed on item listed
in column 2. When items are listed without maintenance functions, it is only to have group
numbers in MAC and RPSTL coincide.
d. COLUMN 4: MAINTENANCE CATEGORY. Lists a “work time” figure in the appropriate
subcolumn(s) to show the lowest level of maintenance authorized to perform the function
listed in Column 3. If number or complexity of tasks within limited maintenance function
varies at different maintenance categories, appropriate “work time” figures will be shown for
each category. Task-hours specified by “work time” figures represent the average time needed to restore a subassembly, module (component or assembly), end item or system to serviceable conditions under typical field operating conditions. The “work time” figure includes
preparation time, troubleshooting time, and quality asaurance/quality control time as well as
time required to perform specific tasks identified for maintenance functions authorized in
the maintenance allocation chart (MAC). Subcolumns of Column 4 are as follows:
C - Operator/Crew
O - Organizational
F - Direct Support
H - General Support
D - Depot
e. COLUMN 5: TOOLS AND EQUIPMENT. Specifies by code those common tool sets (not
individual tools) and special tools, test and support equipment needed to perform the
designated function (Refer to Section III).
f. COLUMN 6: REMARKS. Contains an alphabetic code leading to the appropriate remark
in Section IV.
B-4. TOOLS AND TEST EQUIPMENT REQUIREMENTS
a. TOOL OR TEST EQUIPMENT REFERENCE CODE. Numbers in this column coincide with
number used in Column 5 of the MAC and indicate applicable tool or test equipment for
maintenance functions.
b. MAINTENANCE CATEGORY. Codes in this column indicate maintenance category
allocated the tool or test equipment.
c. NOMENCLATURE. Lists noun name and nomenclature of tools and test equipment
needed to perform maintenance functions.
d. NATIONAL/NATO STOCK NUMBER. Lists National/NATO stock number of specified tool
or test equipment.
e. TOOL NUMBER. Lists manufacturer’s part number of tool, followed by (5 digit) Federal
Supply Code for Manufacturers in parentheses.
B-5. REMARKS
a. REFERENCE CODE. Refers to appropriate item in Section II, Column 6.
b. REMARKS. Provides necessary information to explain items appearing in Section II.
B-2
Section II.
Section II.
B-3
TM 11-5820-520-20
Change 1
Change 1
TM 11-5820-520-20
Section II.
B-4
Section II.
Section II.
Section II.
1
B-5
TM 11-5820-520-20
Change
Change 1
TM 11-5820-520-20
Section II.
B-6
Section II.
Section II.
Section II.
B-7
TM 11-5820-520-20
Change 1
Change 1
TM 11-5820-520-20
Section II.
B-8
Section II.
Section II.
Section II.
B-9
TM 11-5820-520-20
Change 1
Change 1
TM 11-5820-520-20
Section II.
B-10
Section II.
WKO
Voz
zua
U*
20
a
w
+:
Z=
Zg
Zz
Section II.
TM 11-5820-520-20
B-1 1
Section II.
Change 1
TM 11-5820-520-20
B-12
Section II.
Section II.
Section II.
B-13
TM 11-5820-520-20
Change 1
Change 1
TM 11-5820-520-20
Section II.
B-14
Section II.
Section II.
Section II.
B-15
TM 11-5820-520-20
Change 1
Change 1
Section II.
TM 11-5820-520-20
B-16
Section II.
SectionܕI.
SectionܕI.
B-17
TM 11-5820-520-20
Change 1
Change 1
Section II.
TM 11-5820-520-20
B-18
Section II.
TM 11-5820-520-20
Section III. TOOL AND TEST EQUIPMENT REQUIREMENTS
FOR
AN/GRC-106 AND AN/GRC-106A
TOOL OR TEST
EQUIPMENT
MAINTENANCE
REF CODE
CATEGORY
NOMENCLATURE
NATIONAL/
NATO
STOCK NUMBER
1
O
MULTIMETER, DIGITAL
AN/PSM-45
6625-01-139-2512
2
O
TOOL KIT, ELECTRONIC
EQUIPMENT TK-101/G
5160-00-064-5178
3
F,H
TRANSCEIVER TEST SET
AN/GRM-114A
6625-01-144-4481
4
O,F,H,D
TOOL KIT, ELECTRONIC
EQUIPMENT TK-100/G
5180-00-605-0079
5
O,F,H,D
TOOL KIT, ELECTRONIC
EQUIPMENT TK-105/G
5180-00-610-8177
6
F,H,D
POWER SUPPLY PP-4763
5820-00-937-7690
7
F,H,D
MULTIMETER ME-303A/U
6625-01-969-4105
8
F,H,D
PROBE T-CONNECTOR
HP-11042A
5985-00-713-4356
9
F,H,D
OSClLLOSCOPE, DUAL TRACE
AN/USM-488
6625-01-187-7847
10
F,H,D
ELECTRONIC COUNTER
6625-01-061-8928
TOOL
NUMBER
AN/USM-459
11
F,H,D
ELECTRONIC VOLTMETER
AN/URM-145D
6625-01-119-7271
12
F,H,D
SIGNAL GENERATOR
SG-1112(V)1/U
(2 EA. AT D)
6625-00-566-3067
Change 1
B-19
TM 11-5820-520-20
Section III. TOOL AND TEST EQUIPMENT REQUIREMENTS
FOR
AN/GRC-106 AND AN/GRC-106A - Continued
TOOL OR TEST
MAINTENANCE
EQUIPMENT
CATEGORY
REF CODE
NOMENCLATURE
NATIONAL/
NATO
STOCK NUMBER
13
F,H,D
SIGNAL GENERATOR
SG-1171/U
(2 EA. AT H AND D)
6625-01-133-6160
14
F,H,D
TEST SET ELECTRONIC TUBE,
TV-2C/U
6625-00-849-5694
15
F,H,D
ATTENUATOR, VARIABLE
CN-1128/U
5985-00-957-1860
16
F,H,D
ADAPTOR, CONNECTOR (USED 5935-00-937-4035
ON AN/URM-145D), A1 309
17
F,H,D
TORQUE WRENCH,
0-150 INCH LB, TQ 12BL
5120-00-230-6380
18
F,H,D
KEY, SOCKET HEAD SCREW,
S048-4
5120-00-827-2967
19
F,H,D
EXTENSION SOCKET HEAD
WRENCH, FX2
5120-00-243-1689
20
F,H,D
CROW ATTACHMENT,
GGG-C-1507
5120-00-181-6764
21
F,H,D
HANDLE, SOCKET WRENCH,
GGG-W-641
5120-00-240-5396
22
F,H,D
SOCKET, F261
5120-00-235-5807
23
F,H,D
UNIVERSAL JOINT, A-A-2169 5120-00-224-9215
24
F,H,D
THERMOMETER, GGG-T-336
6685-00-444-6000
25
F,H,D
STOP WATCH, GG-S-764
6645-00-250-4680
26
F,H,D
BLOWER, EXTERNAL
(ANY EQUAL TO P/A BLOWER)
B-20
Change 1
TOOL
NUMBER
TM 11-5820-520-20
Section III. TOOL AND TEST EQUIPMENT REQUIREMENTS
FOR
AN/GRC-106 AND AN/GRC-106A. Continued
TOOL OR TEST
EQUIPMENT
MAINTENANCE
REF CODE
CATEGORY
NOMENCLATURE
NATIONAL/
NATO
STOCK NUMBER
27
F,H,D
MULTIMETER, DIGITAL
AN/USM-486/U
6625-01-145-2430
28
F,H,D
SPECTRUM ANALYZER
AN/USM-489(V)/1
6625-01-079-9495
29
F,H,D
ATTENUATOR, BIRD 8325
5985-00-433-0067
30
F,H,D
DUMMY LOAD GROUP
OA-4539/GRC-106
5985-00-089-4379
31
F,H,D
SIMULATOR, RF
SM-442A/GRC
6625-00-937-4029
32
F,H,D
DISTORTION ANALYZER
TS-4084/G
6625-01-217-0054
33
F,H,D
COMBINING NETWORK, AUDIO
(FABRICATED ITEM)
34
F,H,D
TRANSISTOR TEST SET
TS-1 836/U
6625-00-893-2628
35
F,H,D
POWER SUPPLY HP6456B
6130-00-104-5326
36
F,H,D
LEVEL METER, FREQUENCY
SELECTIVE AN/USM-490
6625-01-138-3351
37
F,H,D
GENERATOR, SIGNAL 550L
6625-01-112-1926
38
F,H,D
COMBINING NETWORK, RF
(FABRICATED ITEM)
Change 1
TOOL
NUMBER
B-21
TM 11-5820-520-20
Section IV. REMARKS
REMARK
REFERENCE CODE
A
Operational test only.
B
All tests except GS and Depot tests.
c
All tests except Depot tests.
D
All tests.
E
Service by cleaning external surfaces only.
F
Service by lubricating.
G
All adjustments except module adjustments.
H
All adjustments except 1A8, 1A12, 2A2, 2A3, and 2A4 modules.
I
All adjustments.
J
Mechanical alinement only.
K
All alinements except 1 A12, 2A3, and 2A4 modules.
L
All alinements.
M
Repair by replacement of knobs, fuse, external screws, running spare items,
or external cables.
N
Repair by replacement of tubes, modules, and other plug-in/pluck-out items,
switches, external connectors, or meters.
o
Repair of all modules except 1 A8, 1A12, 2A2, 2A3, and 2A4.
P
All repairs.
Q
All module adjustments except 1A8 and 1A12.
R
All adjustments.
s
All alinements except 1A12.
T
Repair of all modules except 1A8 and 1A12.
u
Repair by replacement of J16, J17, J24, M7, rf filters, 1A1A1A10,
capacitor assemblies 1A1A1A6 and 1A1A1A5, or resistor assembly
1A1A1A7.
B-22
Change 1
TM 11-5820-520-20
Section IV. REMARKS. Continued
REMARK
REFERENCE CODE
v
Repair by replacement of resistors, diodes, switches, or fuse holder.
w
Repair by replacement of miscellaneous hardware, internal alc assembly
1A1A2A5, tuning drive 1A1A3, or voltage regulator assembly 1A1A2A9.
x
Repair by replacement of all major subassemblies, miscellaneous hardware,
or miscellaneous electrical components.
Y
All test except GS and individual subassembly tests.
z
All adjustments except 2A2, 2A3, 2A4, 2A8, and 2A9 modules.
AA
All adjustments except 2A2, 2A3, and 2A4 modules.
AB
All adjustments.
AC
All alinements except 2A3, and 2A4 modules.
AD
Repair by replacement of tubes, relays, GS level assemblies, switches
external connectors, meters, or rf coil strips.
AE
All repairs except Depot repairs.
AF
Repair by replacement of chassis or front panel.
AG
Repair by replacement of internal miscellaneous hardware.
AH
Repair by replacement of tube 2A1A1V1, or 2A1A1V2.
Al
Repair by replacement of vaneaxial fan.
AJ
Repair by replacement of miscellaneous hardware, electrical connector cover,
or knobs.
AK
Repair by replacement of miscellaneous hardware, switches except GS
switches, electronic component assemblies, gasket, protection circuit
assembly 2A1A5A7, de-to-de converter assembly 2A1A5A2, transistor
2A1A5Q1 or rf filter box 2A1A5A1.
AL
Repair by replacement of 2A1A5A2A6.
AM
Repair by replacement of 2A1A5A2A4.
AN
Repair by replacement of transformer assemblies 2A2A1 Al through
2A2A1A15 and or filter assemblies 2A2A1A16 through 2A2A1A31.
Change 1
B-23
TM 11-5820-520-20
Section IV. REMARKS - Continued
REMARK
REFERENCE CODE
B-24
AO
Repair by replacement of motor amplifier inverter, miscellaneous hardware,
exhaust screen, or vaneaxial fan.
AP
Repair by replacement of tube 2A8V1, tube shielding, or spacer plate.
AQ
Test by continuity checks only.
AR
See TM 11-5820-467-15.
AS
See TM 11-5965-222-14P.
AT
Repair by replacement of miscellaneous hardware, switch assembly,
miscellaneous switches, filter box, gasket, protection circuit, or dc-to-dc
converter 2A1A5A2.
AU
Repair by replacement of miscellaneous hardware, miscellaneous switches,
contacts, relays, gear set, wiring harness, or front panel.
Change 1
TM 11-5820-520-20
APPENDIX C
EXPENDABLE SUPPLIES AND MATERIALS
Section I. INTRODUCTION
C-1. G&4 GENERAL INFORMATION
This appendix lists expendable supplies and materials You will need to operate and maintain
AN/GRC-106(*). These items are authorized to you by CTA 50-970, Expendable items.
C-2.
EXPLANATION OF COLUMNS
a. ITEM NO. This number is referenced in the narrative instructions to identify the material
(for example, “Use cleaning compound, Item 5, App. C“).
b. LEVEL. Shows the lowest level of maintenance that needs the listed item.
C - Crew/Operator
O - Organizational Maintenance
c. NATIONAL STOCK NUMBER. Shows the National Stock Number assigned to each item
and used to requisition that item.
d. DESCRIPTION. Shows the National Item Name and (if required) a short description to
identify and locate the item. The last line for each item shows the Federal Supply Code for
Manufacturers (FSCM) in parentheses, followed by the part number.
e. UNIT OF MEASURE (U/M). Shows the amount of the item needed to perform the actual
operational/maintenance function. This measure is shown by a two-letter abbreviation (for
example EA, OZ, IN).
C-1
TM 11-5820-520-20
Section II. EXPENDABLE SUPPLIES AND MATERIALS LIST
NATIONAL
STOCK
NUMBER
ITEM
NO.
LEVEL
1
c
6850-00-105-3084
Trichlorotrifluoroethane
QT
2
c
8305-00-267-3015
Cleaning cloth
YD
3
0
6850-00-880-7616
Silicone compound
OZ
4
0
5350-00-264-3485
Sandpaper, PP-105
SH
C-2
Change
1
DESCRIPTION
U/M
TM 11-5820-520-20
GLOSSARY
Alternating current (ac) . . . . . . . . . . . . . . . . . . Electrical current continuously reversing
direction and changing in power.
Continuity
. . . . . . . . . . . . . . . . . . . . . . The condition of a circuit when it has a
closed, continuous electrical path.
Continuous wave (cw) . . . . . . . . . . . . . Electrical current with constant frequency
and power.
Direct current (dc) . . . . . . . . . . . . . . . . . . Electrical current flowing in one direction
and constant in power.
Receiver-Transmitter (RT) . . . . . . . . . . . . . . . . When used in this manual, refers to either
RT-662/GRC or RT-834/GRC.
Remote site . . . . . . . . . . . . . . . . . . . . . . . . . . . One located up to two miles away to provide
additional communication.
Change 1
Glossary-1/(Glossory-2 blank)
TM 11-5820-520-20
INDEX
SUBJECT
PAGE
A
Antenna, Mast:
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Army materiel, destruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
C
Cables, removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-20
Checking unpacked equipment . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-1
Cleaning:
Heater exchanger assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-22
Mast Base AB-652/GR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Components, disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.24
Controls, front panel, repair and replacement . . . . . . . . . 2-23
Crate, shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Cross-reference list, nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
D
Data and description, equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Destruction, Army materiel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Differences between models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Disassembly, equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
E
Equipment:
Data and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-24
F
Forms, records, reports . . . . . . . . . . . . 1-1
Front panel controls, repair and replacement . . . . . . . . . . . . . . . . . 2-23
G
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
General, maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-19
I
Inspection, equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
L
List, nomenclature cross-reference . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Location, major components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
M
Maintenance, general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Major components, location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Mast sections:
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Replacement . . . . . . . . . . . . . . . . . . . . 2-22
Monthly PMCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Change 1
Index-1
TM 11-5820-520-20
INDEX - Continued
PAGE
SUBJECT
N
Nomenclature cross-reference list . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
P
Painting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-23
PMCS Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Preparation for storage and shipment . . . . . . . . . . . . . . . . . . . . . . 2-24
Preventive maintenance checks and services . . . . . . . . . . . . . . . . . . . 2-2
Principles of operation, technical . . . . . . .. . . . . .. . . . . . . . . . . . . . . . . . . . . 1-2
Purpose of equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
R
Receipt, service upon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Records, reports, forms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Removal:
Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-20
Mast sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-19
Repacking equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-24
Repair and replacement:
Front panel controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Front panel gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-23
Mast sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-22
Repair parts, special tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Reports, forms, records . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
S
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Service upon receipt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Shipment, preparation for . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-26
Shipping crate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Special tools, TMDE, support equipment . . . . . . . . . . . . . . . . . . . . . . 2-1
Storage and shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-26
Storage, types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
T
Tables:
PMCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Technical principles of operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Tools, test equipment:
For PMCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Troubleshooting Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Types of storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
u
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-1
Index-2
By Order of the Secretary of the Army
EDWARD C. MEYER
General, United States Army
Chief of Staff
Official:
ROBERT M. JOYCE
Brigadier General, United States Army
The Adjutant General
DISTRIBUTION :
To be distributed in accordance with DA Form 12-51 Organizational
Maintenance Requirements for AN/GRC-106.
✩ U.S. GOVERNMENT PRINTING OFFICE :
1993 0 - 342-421 (80711)
PIN : 052292-000
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