TM-9-2350-275-BD

M113 FAMILY CARRIER, PERSONNEL SELF-PROPELLED FULL-TRACKED

TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; BATTLEFIELD DAMAGE ASSESSMENT AND REPAIR

TM-9-2350-275-BD - Page 153 of 223

TM 9-2350-275-BD

COMMUNICATIONS SYSTEM

11-34. FIELD EXPEDIENT RADIO REMOTE

General Information:

This procedure gives instructions for the construction of a field expedient remote to

replace the AN/GRA-39 if it is inoperative.

Limitations:

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None

Personnel/Time Required:

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1 soldier

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60-90 minutes

Materials/Tools:

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680 Ohm Resistor

47 Ohm Resistor

5000 Ohm Variable Potentiometer

H-144/U Handset (only cord and plug used)

M-80 Microphone (only cord and plug used)

K-1 Relay (28 VDC) (NSN: 5945-00-951-6458)

BA4386/U Battery (NSN: 6135-00-926-8322)

TA-312/PT Field Telephones (two each)

Electrical tape

18-24 Gauge wire

Soldering iron and solder

Wire strippers

Multimeter or continuity tester

Knife

WD-1/TT field wire (as needed)

Procedural

Steps:

1. Build the prototype radio remote unit from the schematic using the following steps:

a.

Locate the R-3 potentiometer, K-1 relay, and BA4386/U battery. Tape the

three components solidly together.

b. Cut the cords from the H-144/U handset and the M-80 microphone.

11-47