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Old 7th Apr 2021, 7:12 pm   #12
Granitehill
Tetrode
 
Join Date: Mar 2019
Location: York, North Yorkshire, UK.
Posts: 74
Default Re: MF/HF Receiver type R/75/WRDV/3550

If I remember right, it was also known as the Pye CAT. There was also a near equivalent from Murphy known as the CAS. The CAS and CAT radios were naval HF/MF equipment for small ships and as emergency reserves for bigger ones. They came with matching MF and HF transmitters, and were usually mounted as a stack of three items, plus a separate power unit which also contained a vacuum relay (!) for high speed TX/RX switching. TX output was about 40W.

Much more info in Electronic Engineering magazine June 1954 page 272. This article was written by one J.R. Humphries of Pye.
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