TM 750-5-3
Chart I.
Table of Set or Equipment Indicator Letters--Continued
--
--
2
1
3
1st letter (designed installation classes)
2d letter (type of equipment)
3d letter (purpose)
Purpose
Installation
Type of Equipment
P--Reproducing (inactivated, do not
U--General utility (includes two or
T--Telephone (wire).
V--Visual and visible light.
more general installation
use).
W--Armament (peculiar to arma_
classes, airborne, shipboard,
Q--Special, or combination of purposes.
ment, not otherwise covered).
and ground).
R_Receiving, passive detecting.
V--Ground, vehicular (installed in
X--Facsimile or television.
S--Detecting and/or range and bearing,
Y--Data processing.
vehicle designed for functions
search.
other than carrying electronic
T--Transmitting.
equipment, etc., such as
W--Automatic flight or remote control.
tanks).
X--Identification and recognition.
W--Water surface and underwater.
Chart II.
Table of component indicators
--
_
.
Component
Family name
Examples of use (not to be construed as limiting the application of the component
indicator)
indicators
Supports, antenna _ _ _ _ _ _ _ _ _ _ _
AB _ _ _ _ _ _
Antenna mounts, mast bases, mast sections, towers, etc.
AM______
Amplifiers _ _ _ _ _ _ _ _ _ _ _ _ _ ____
Power, audio, interphone, radio frequency, video, electronic
control, etc.
AS_______
Antennae, complex _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Arrays, parabolic type, masthead, etc.
AT______
Antennae, simple _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Whip or telescopic loop, dipole, reflector, etc.
B batteries, battery packs, etc.
Battery, primary type _ _ _ _ _ _ _ _ _ _ _ _
BA _ _ _ _ _ _ _
Battery, secondary type_ _ _ _ _ _ _ _ _ _ _
BB______
Storage batteries, battery packs, etc.
BZ _ _ _ _ _
Signal devices, audible_ _ _ _ _ _ _ _ _ _ _ _ _
Buzzers, gongs, horns, etc.
C_______
Controls _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Control box, remote tuning control, etc.
Peculiar to sonar equipment.
CA _ _ _ _ __
Commutator assemblies, sonar _ _ _ _ _ _
Capacitor bank _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Used as a power supply.
CB_______
RF cables, waveguides, transmission lines; etc., with terminals.
Cable, assemblies, RF_ _ _ _ _ _ _ _ _ _ _
CG_______
A kit of crystals with holders.
CK_______
Crystal kits _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Comparators _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Compares two or more input signals.
CM _ _ _ _ _ _
CN_ _ _ _ _ _
Compensators _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Electrical and/or mechanical compensating regulating or
attenuating apparatus.
CP_______
A mechanical and/or electronic mathematical calculating device.
Computers _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
CR_______
Crystals _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Crystal in crystal holder.
CU_______
Couplers _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
CV_______
Converters (electronic) _ _ _ _ _ _ _ _ _ _ _ _ _ _
Electronic apparatus for changing the phase, frequency, or
from "one" medium to "another."
CW_ _ _ _ _ _
Covers _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _
Cover, bag, roll, cap, radome, nacelle, etc.
CX_______
Cable assemblies, non-RF_ _ _ _ _ _ _ _ _ _ _
Non-RF cables with terminals, test leads, also composite cables
of RF and non-RF conductors.
CY_______
Cases and cabinets _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Rigid and semirigid structure for inclosing or carrying equip_
ment.
D_______
Dispensers _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Chaff dispensers.
DA_______
Load, dummy _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
RF and non-RF test loads.
DT______
Detecting heads _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Magnetic pickup device, search coil, hydrophore, etc. (see RF).
DY______
Dynamotors _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Dynamotor power supply.
Hoists _ _ _ _ _ _ _ _ _ _ _ _ _ __ _____
E_______
Sonar hoist assembly, etc.
F_______
Filters _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Band-pass, noise, telephone, wave traps, etc.
Furniture _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
FN _ _ _ _ _ _
Chairs, desks, tables, etc.
FR_______
Frequency measuring devices_ _ _ _ _ _ _ _
Frequency meters, tuned cavity, etc.
5
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