ARC34 variants.

VINTAGE AVIONICS

VINTAGE AVIONICS

Later variants of the AN/ARC-34

RT-263/ ARC34           Original UHF radio, built in 1952 by RCA and Magnavox

                                             Has dynamotor and 1750 channels

RT-423 / ARC-66        Same system in jerrycan form to fit in the early F104 starfighter

                                             Note: Later Starfighters had ARC52 versions.

RT-463 / ARC-34A    Has the PP1990 static power supply, replacing the DY103               

                                             dynamotor. The PP1990 allowed 17-30V dc system input, instead

                                             of  only 26-28Vdc as with the dynamotor.

RT-463A/ARC-34B    Has the RF module AM-3408 with improved reliability.

 

RT–720/ ARC-34C     Has 3500 channels by adding  4 Xtals to osc.3

                                             More channels, but same selectivity.

 

RT-750/ ARC-34C /G  same ?

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The oven with the Xtals for oscillator 2 had 4 Xtals in the ARC34A and B with 100kHz channel spacing, but got 8 crystals for the ARC34C with 50kHz channel spacing.

 

Some  types had just one thyratron 5727 in the Selector ( tuning motor controller), in stead of 3 in parallel.

 

 

The PP1990 power supply.

A description of the PP1990 is here.