INTRODUCTION - TM-11-5820-815-140011

TO 31R2-2GRC171-2

TM 11-5820-815-14

NAVELEX 0967-LP-544-5010

INTRODUCTION

This technical manual provides information for servicing

ASA-STD-

Electrical and Electronic Reference

Radio Set AN/GRC-171, Collins part number 622-1627-

Y32-16-1965

Designations

001, manufactured by Collins Radio Group/ Rockwell

MILITARY SPECIFICATIONS

International, Cedar Rapids, Iowa. Radio Set AN/GRC-

171 consists of the following: Radio Receiver-Transmitter

MIL-M-38730

Technical

Manuals,

General

RT-980/GRC-171, Collins part number 622-1628-001;

Requirements for Preparation of

Radio Set Control C-7999/ GRC-171, Collins part

number 622-1629-001; cable interface kit, Collins part

MIL-M-4410

Technical Manuals: Title Pages, List of

number 622-7846-001; and slide mounting hardware kit,

Effective Pages, and Reproduction

Collins part number 623-5818-001. Radio Set AN/GRC-

Assembly Sheet; Photolith Negatives;

171 provides air traffic control communications at

Printing; and Binders

collocated vhf/uhf receiver-transmitter sites. The

equipment is capable of providing AM communications

MIL-T-9941

Technical Manuals: Ground C-E

on any of the 7,000 channels in the 225to 399.975-MHz

Equipment Facility, Site, and System

band with 20watt AM carrier output.

TECHNICAL ORDERS

Chapter 1 provides an overall electrical and mechanical

description of the equipment.

31-1-141

Basic Electronics

Technology

and

Testing Practices

Chapter 2 provides information on installation, of the

EFFECTIVITY

equipment.

Each equipment, unit, and assembly provided is marked

Chapter 3 provides operating instructions.

with a manufacturing alphabetic identifier in addition to

the basic part number. The alphabetic identifier will be

Chapter 4 describes the basic operating principles of the

preceded by the letters REV(revision) and will start with 0

equipment.

if no changes have been processed. The first change will

be identified as A, the second as B, and continuing

Chapter 5 provides maintenance instructions, including

through Z to AA and ultimately to ZZ. Because minor

performance tests and adjustment procedures.

electrical and/or mechanical differences exist between

various revisions, where applicable, an effectivity-versus-

Chapter 6 provides information on the use of circuit

revision identifier cross-reference is provided on the

diagrams and equipment effectivity. All foldout diagrams

schematic diagram.

appear in chapter 6 of this manual regardless of their

applicability to any one chapter.

Each effectivity applies to a group of revision identifiers

and is indicated by a key () on both the effectivity table

A complete illustrated parts breakdown of the equipment

and

the

appropriate

schematic

diagram.

is provided in TO 31R2-2GRC171-4.

The following publications were used in the preparation

of this manual.

MILITARY STANDARDS

MIL-STD-12B

Abbreviations for Use on Drawings

and in Technical-Type manuals

VIIL-STD-15-1A Graphic Symbols for Electrical and

Electronic Diagrams