Standard REFERENCE DESIGNATORS

A            Assembly

AR         Amplifier

AT         Attenuator; Isolator

B            Blower

BR         Bridge Rectifier

BT         Battery

C            Capacitor

CB         Circuit Breaker

CN         Capacitor Network

CP         Coupler

CR         Diode or Silicon Rectifier

D            Diode; Thyristor; Varacter

DC         Directional Coupler

DP         Duplexer

DL         Delay Line

DS         Digital Display; LED Lamp

E            Miscellaneous Electrical Part

F            Fuse

FB          Ferrite

FD         Fiducial

FL          Filter

G           Generator

HW        Hardware

HY         Circulator

I or ICT In Circuit Test Point

J            Jack Connector

JP          Configuration Jumper

K           Relay

L            Coil; Inductor

LS          Loud Speaker/Buzzer

M           Motor

MG        Motor-Generator

MH        Mounting Hole

MK        Microphone

MP         Mechanical Part

P            Plug Type Connector

PS          Power Supply

Q           Transistor

R            Resistor

RN         Resistor Network

RT         Thermistor

S            Switch

T            Transformer

TB         Terminal Block

TC         Thermocouple

TP          Test Point

U            Tuner

U            Integrated Circuit

V            Electron Tube

VR         Voltage Regulator

W           Cable Transmission

X            Sub-circuit

Y            Crystal or Oscillator

Z            Ref Des Suppressed