4. Repair Parts and Special Tools List TM 11-5820-
1-1. SCOPE OF THE TECHNICAL MANUAL.
919-24P. Contains complete parts ordering data
for all levels of radio set maintenance.
1-2. This technical manual provides operator's and
organizational maintenance information covering Radio
1-4. Chapter 1 of this technical manual provides general
Set AN/PRC-104 (radio set). The information includes
reference data and information on the physical aspects
operating instructions, installation and setup, theory of
and technical characteristics of the radio set. It also
operation and maintenance data. Additionally, the
covers setup, initial checkout, and demolition to prevent
propagation of radio waves in the high frequency (hf)
enemy use. Chapter 2 contains operating instructions,
radio spectrum is discussed relative to optimizing
and also discusses various operating environments for
communications with this radio set. Complete coverage
optimizing communication. Chapter 3 provides system
for Battery Case CY-7875/ PRC-104 (battery pack) is
and functional theory of operation. Chapter 4 contains
provided in this manual, because the battery pack is
maintained entirely at the organizational level.
maintenance, troubleshooting, and repair down to
replacement of units and accessories. Appendix I, at the
1-3. Complete coverage of the radio set, including
back of this manual, contains a list of abbreviations used.
Appendix II1 provides a discussion of hf radio wave
and Radio Frequency Amplifier AN1-6874/ PRC-104
propagation and gives Situational examples for
(amplifier/coupler), for field and depot levels of
Appendix III provides
maintenance is provided in the following manuals:
instructions for use of the dipole antenna kit.
1. General Support Maintenance Manual TM 11-
1-5. EQUIPMENT DESCRIPTION.
5820-919-40-1. Contains reference data, theory
of operation and disassembly and reassembly
1-6. INTRODUCTION. The AN/PRC-104 is a state-of-
for the complete radio set. It also provides test
troubleshooting, alignment and repair data for
the-art lightweight radio transceiver that operates in the
the radio set and the receiver/exciter and
high frequency (hf) and upper part of the low frequency
amplifier/coupler units necessary to replace unit
(If) portions of the radio spectrum.
components and modules.
The receiver/transmitter circuits can be tuned to any
2. General Support Maintenance Manual TM 11-
frequency between 2.0000 and 29.9999 MHz in 100 Hz
5820-919-40-2. Contains maintenance prints for
increments, making it possible to tune up to 280,000
the radio set, units and modules.
separate frequencies. The radio set operates in the
upper sideband (USB) or lower sideband (LSB) modes
Maintenance prints include all schematics;
for voice communications, CW for Morse code, or
power distribution; component location; test and
frequency shift keying (FSK) for transmission of teletype
alignment setup; performance test and
or other data. In the man-pack configuration the radio
set is designed to be carried and operated by one man
maintenance of the radio set.
or, with the proper accessories, can be configured for
vehicular or fixed station use.
3. Rebuild Standards RS-07748A-50/4. Contains
depot-unique repair and rebuild data for the radio
set that is not covered in the field maintenance