TM-9-2350-275-BD Battlefield Damage Assessment and Repair for M113 Family Download
Page 153 of 224
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: ● None Personnel/Time Required: ● 1 soldier ● 60-90 minutes Materials/Tools: ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 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