RT– 263   / ARC-34 with remote Frequency display ID-572 and control  C-1057/ARC-34

1953

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Communication.

VINTAGE AVIONICS

AN/ARC-34

The AN/ARC-34, made by RCA and Magnavox, is capable of transmitting and receiving on any one of  1750 channels, spaced 100 kHz, within the frequency range of  225.0 to 399.9 MHz.  The RF power output is  10 watts.   Audio Frequency bandwidth is 6 kHz , audio output is 0.5W.  There is a  1kHz tone modulation facility.

 

The transceiver has half the volume and weight of the ARC-27, yet the performance is the same.

Warm DC input is 13A at 27.5V dc (Rx) or 18A (Tx). Cold  input current is 25A including  start of the dynamotor, heaters inrush,  and 8A for the quick warm-up of the crystal ovens.

The original set had a dynamotor, later sets had the PP1990 static power supply.

 

Miniature tubes are used. The receiver is a double superhet with fixed IF frequencies. The local oscillator signal is synthesized from 15 crystals in temperature controlled ovens.

Tuning is done with 3 Ledex stepper motors plus a relay for the 2xx or 3xx MHz  selection.  The connection  from the control to the RT has only one wire per digit.

The modules are mounted on opposite sides of a  central septum.  There are no mechanical interconnections between modules to distribute motion to switches or variable capacitors.

Although non- pressurized , this set was designed for full operation up to 50000 feet  altitude.

 

Parts:  Radio receiver/transmitter:  RT-263/ ARC-34

           Mounting:    MT-1099/U

           Control    C-1057/ARC-34 Radio Set Control or C-1057A/ARC-33

           Remote frequency indicator  ID-/572 or ID-573

           Antenna   Flush-tail cap-type arrays, Antenna AT-256A/ARC or any other 52 ohm

           Special test voltmeter  ARM-11/ARC  or  URM76A

           Radio testset ARM-47

 

Click  here for the circuit and wiring diagrams

 

Click for pictures of the top, and bottom side.

Click on the exploded view picture for a higher resolution version.

AN/ARC-34   Airborne transceiver  (1953)