Quite a few early British TVs were TRF. There was only 1 TV channel and no immediate prospect of more so a fixed tuned TRF was a simple and economical approach. TRF designs continued to appear until around 1952, with different models being sold in different regions which used different channels for the BBC service.
AFAIK the first British set without a mains transformer was the Pye B18T from July 1948:
http://www.thevalvepage.com/tvmanu/pye/body_pye.htm this was also the first Briitish set to employ flyback EHT. It was also a TRF.
08-31-2014, 02:18 AM
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