[Lowfer] Old LF D/F Receiver

[James Moritz]

Dear LF Group, Lowfers

I recently bought a WWII vintage LF and MF receiver, which according to the 
label was "part of aircraft direction finder DZ-1", type CRV-46123, 
apparently made by RCA. Does anyone have any info on this RX?

It covers 15kHz to 1.5MHz in 6 bands, with a gap from 70kHz to 100kHz, so I 
imagine the IF is 85kHz. It has a 5 gang tuning capacitor, with separate 
input stages for loop and wire antennas, and facilities to select either or 
both antennas for non-directional, directional, or "unilateral" reception, 
with various gain and phase adjustments. The audio stages appear to have 
tuned transformers to improve selectivity. The valves are glass types, 
mainly on 6 pin bases. The tuning dial has main and vernier scales giving 
0-1000 divisions, and there is a calibration chart on the front panel.

It is simple enough to get working without a manual, but I would be 
interested if anyone knows more about it.

Cheers, Jim Moritz
73 de M0BMU