Collins TCS Radio System

WW2 US Navy TCS TX and RX

General Information: TCS Radio System

Engineered and Manufactured by Collins Radio Company

More than 35,000 units were produced by Collins

Stewart-Warner, King Radio, and others also produced units

Collins Model 51Q Receiver and 56Q Transmitter

Designed for Portable and Mobile Service

Suitable for installation where severe vibration present

May be installed in Trucks, Ambulances, Motor Boats, Etc

Units mounted in steel boxes, painted with Black crinkle finish

Sub-assembly type of construction facilitates easy repair

Power interlock switch removes power from unit out of cabinet

Power Supply

Maximum power consumption with radio transmitter modulating

DC power units are availiable in 12,24, 32, 115 and 230 volts

AC power units are availiable in 115 and 230 volt/ 60 cycle

DC Dynamotor Power Unit is 12 volt, 225vdc & 400vdc dynamotors

Motor Generator Units: Change motor to suit source voltage

Transmitter

Oscillator-Buffer-Amplifier Circuit

Select one of four crystals or master oscillator frequency control

Frequency range: 1,500 kc to 12,000 kc

Bands of Operation: 1.5-3.0 mc, 3.0-6.0 mc, 6.0-12.0 mc

Rugged construction for high stability frequency tolerance

Voice operation with amplitude modulation of 90% minimum

CW operation at 30 WPM maximum in master oscillator mode

CW operation at 20 WPM maximum in crystal oscillator mode

Audio frequency response 300 cps to 3,000 cps

Microphone: Carbon microphone (100 ohm resistance type)

Power Output: 20 watts Voice, 40 watts CW

Crystals: 1,500 to 3,000 kc- 1st, 2nd, 3rd, 4th harmonic frequencies

Tubes:12A6 Master Oscillator, 12A6 Buffer-Doubler

Tubes:12A6 Crystal Oscillator, 1625 Modulators and RF Amplifiers

Receiver

Superheterodyne Circuit

Crystal or Master Oscillator frequency control

One Stage of R-F Amplification

Two Stages of I-F Amplification

Frequency Range: 1,500 kc to 12,000 kc

Crystal operation in all ranges, less sensitivity 6,000 to 12,000 kc

Audio Output Power: 1 watt with less than 5% distortion, 1.5W maximum

Sensitivity: 6 milliwatts audio with less than 15 microvolts input

Selectivity: 9kc wide at 6db down, 30kc wide at 40db down

Antenna Input: Designed for 20' Whip antenna, Switched by transmitter

Tubes:12SK7 R-F Amplifier, 12SA7 Converter, 12A6 Master/Crystal Osc.

Tubes: 12SK7 I-F Amplifers, 12A6 Audio Amplilfier, 12SQ7 Detector-BFO

Remote Control Unit

Loudspeaker

Power on/off

Emmision selection- AM/CW

Speaker/headphones selection

Audio output level to speaker/headphones

Microphone input jack

Telegraph Key input jack

Headphone jack

Accessories

Antenna Loading Coil: In series with antenna, 6 inductance values

Interconnecting Cables: TX to Power, Rx to Power, Control to Power

Microphone: Single button Carbon, approxiamately 100 ohms resistance

Telegraph Key: Standard type w/shorting lever

Headphones: approxiamately 500 ohms impeadance

Tools: #10 & #6 Bristo wrench (located inside Transmitter cabinet)

Receiver and Remote Diagram- TCS 12
Transmitter and Dyn PS Diagram- TCS 12

Last Updated: February 19, 2006