CHAPTER 1. INTRODUCTION - TM-11-5820-401-35-10007

TM 11-5820401-35-1/NAVELEX 0967-432-3020

CHAPTER 1

INTRODUCTION

to Publications) and forwarded direct to Com-

1-1. Scope

mander, US Army Electronics Command, ATTN:

a. This manual covers direct support (DS),

AMSELMA-CR, Fort Monmouth, N.J. 07703.

general support (GS), and depot maintenance

of Control, Frequency Selector C2742/VRC (fig.

14. Official Nomenclature and Common

1-1) (ch. 2) and Control, Radio Set C-2299/VRC

Names

(fig. 12) (ch. 3). Repair parts lists for the con-

trols are provided in appendixes B and C.

a. Official Nomenclature. Official nomenclature

followed by (*) indicates all models of the equip-

b. Operation, operator, and organizational

m e n t ; thus-

maintenance, and organizational repair parts are

provided in TM 11-582040112.

(1) Receiver-Transmitter, Radio RT-246-

(*)/VRC represents RT-246/VRC and RT-246A/

1-2. Maintenance Forms and Records

VRC.

Department of the Army forms and procedures

(2) Receiver-Transmitter, Radio RT-524-

used for equipment maintenance will be those pre-

V R C represents RT-524/VRC and RT-524A/

scribed in TM 38750.

(3) Receiver, Radio R-442(*)/VRC repre-

1-3. Reporting of Errors

sents R-442/VRC and R-442A/VRC.

The reporting of errors, omissions, and recom-

b. Common Names. The following common

mendations for improving this publication by the

names are used to represent the indicated equip-

individual user is encouraged. Reports should be

made on DA Form 2028 (Recommended Changes

ment:

Publication

Item

Common name

TM 11-5820-401-12

Radio Sets AN/VRC-12 and AN/VRC-43 AN/VRC-12-series radios.

through AN/VRC-49.

TM 11-5820401-12

Receiver-Transmitter, Radio RT246(*)/ Receiver-transmitter.

VRC or RT-524 (*)/VRC.

Microphone, Dynamic M-80/U; Headsets Audio accessories is a term used in

H-140A/U and H-251/U; Headset-Mi-

this manual to apply to these and

crophone H-1 161/U; Loudspeaker LS-

similar devices.

454/U; and CVC helmet.

Combat Vehicle Crewman Helmet T566 CVC helmet.

w i t h Headset-Microphone Kit MK-

1039/U as the audio accessory installed

in it.

have been set up in the RT246 (*)/VRC. It can

1-5. Purpose and Use

also turn off the power to the RT246 (*)/VRC

a. Control, Frequency Selector C-2742/VRC

and turn it on again to control the radio frequency

(RF) output power (high and low) of the RT-

(fig. 1-1). The C-2742/VRC is used with the RT-

246(*)/VRC,

246(*)/VRC (fig. 21) to provide remote auto-

b. Control, Radio Set C-2299/VRC (fig. 1-2).

matic selection of the 10 present frequencies that

1-1