CHAPTER 1. INTRODUCTION - TM-11-5820-509-350012

TM 11-5820-509-35

CHAPTER 1

INTRODUCTION

The

reporting

errors,

omissions,

and

1-1. Scope

recommendations for improving this publication by the

a. This manual contains instructions for general

individual user is encouraged. These reports should be

support, direct support and depot maintenance of Radio

submitted on DA Form 2028 (Recommended Changes

Set AN/PRC-47.

It includes instructions that are

to Publications and Blank Forms) and forwarded direct

appropriate to the general support, direct support and

to Commander, U.S. Army Electronics Command,

depot maintenance routines for performance testing,

ATTN: DRSEL-MA-Q Fort Monmouth, NJ 07703.

troubleshooting, alignment, and repair of the equipment,

the replacement of maintenance parts, and the repair of

1-3.1

Reporting

Equipment

Improvement

specific subassemblies. A list of tools, materials and

Recommendations (EIR)

test equipment that are required for maintenance is

EIR will be prepared using DA Form 2407 (Maintenance

included.

A detailed theory of operation for the

Request). Instructions for preparing EIR's are provided

equipment is included in chapter 2.

in TM 38-750, The Army Maintenance Management

b. Operator and Organizational Maintenance

System.

EIR's should be

mailed directly to

Manual, Radio Set AN/PRC-47 TM 11-5820-509-12,

Commander, US Army Electronics Command, ATTN:

including Repair Parts and Special Tools List and

DRSEL-MA-Q, Fort Monmouth, NJ 07703.

Maintenance Allocation Chart, contains additional

information pertainent to this same equipment.

1-3.2. Administrative Storage

c. Only one model of Radio Set AN/PRC-47 is

Administrative storage of equipment issued to and used

documented in this publication. An historical record of

by Army activities shall be in accordance with TM 740-

equipment revisions is shown in paragraph 1-4.

90-1.

1-2. Indexes of Publications

1-3.3 Destruction of Army Electronics Materiel

a. DA Pam 310-4. Refer to the latest issue of DA

Destruction of Army electronics materiel to prevent

PAM 310-4 to determine whether there are new editions,

enemy use shall be in accordance with TM 750-244-2.

changes, or additional publications that pertain to this

equipment.

1-4. Historical Revisions to Equipment

b. DA Pam 310-7 Refer to DA Pam 310-7 to

a. No External appearance or major operational

determine whether there are modification work orders

differences exist between procurements of Radio Set

(MWO's) pertaining to this equipment.

AN/PRC-47.

NOTE

b. The electrical subassemblies and plug-in

modules of Radio Receiver-Transmitter RT-671/PRC-47

Other applicable forms and records

have been revised during the history of Radio Set

are included in Operator and

AN/PRC-47 as indicated in the table below. Complete

Organizational Maintenance Manual,

interchangeability of the electrical subassembly or

Radio Set AN/PRC-47, TM 11-5820-

module was retained.

509-12.

1-3. Reporting of Errors

Ref des

MCN effectivity

Description of change

AUDIO FREQUENCY AMPLIFIER AM-3506/PRC-47 (A8A1)

A1C33

525

Changed to 47 uF, was 33 uF.

A1C39

525

Delete, was 22 uF.

A1CR14

525

Delete, was type 1N457.

A1Q11W / A1Q12X

525

Changed to matched pair, type 2N158A match Beta within 25%

at IC = 250 ma

A1R55

525

Changed to 18K, was 100K ohms.

A1R60

525

Changed to 16.2K 2as 7.5K ohms.

A1R69

525

Delete, was 18K ohms

A1R70

525

Delete, was 470K ohms.

A1R71

525

Delete, was 2,200 ohms.

A1R72

525

Changed to 1,200 was 2,700 ohms.

Change 2

1-1