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 126 of 223

TM 9-2350-275-BD

COMMUNICATIONS SYSTEM

11-20. FIBERGLASS WHIP ANTENNA REPLACEMENT

General Information

Since it is not practical to splint a broken fiberglass whip, this procedure gives

instructions for construction of a field expedient antenna if no other antenna is

available.

Limitations:

●

Loader’s hatch cannot be completely closed

●

May result in degraded performance

Personnel/Time Required:

●

1 soldier

●

30 minutes

Materials/Tools

●

Cable, coaxial, RG-8 (NSN 6145-00-161-0887) or RG-58 (NSN 6145-00-161-0908), 20-

foot length

●

Pencil, nail or sharp stick

●

Pole, wooden or stick, 10-foot length

●

Rope

●

Tape, electrical

Other Options

●

Utilize the R-442 auxiliary receiver metallic whip antenna by exchanging coaxial

cables between receiver/transmitter.

●

Replace antenna with field expedient ground plane antenna. (Refer to para. 11-21.)

Procedural Steps

1.

Measure off and mark but do not cut five feet of coaxial cable.

2.

In one foot steps, strip the outer insulation from the cable to expose the braided

shield wire. Use care so that the shield wire is not cut.

3. Bend the cable into a loop, holding it with one hand. Using a pencil or nail, and as

close to the remaining insulation as possible, carefully separate the braided shield from

the insulated center conductor.

4.

Work the pencil or nail between the shield wire and center conductor to form a

hole. W bile keeping the loop formed, place a finger in the hole and slowly pull the

center conductor out of the shield.

5.

Tape the center conductor to the top portion and the braided shield to the bottom

portion of a ten-foot pole. Tape as necessary to hold cable securely in place.

11-20