06-07-2016, 09:01 PM
This is the AM (MW & LW)/ FM model, which, although it uses valves with 6v3 heaters, fed via an isolatting transformer, it's HT+ is derived directly from the mains, which supplies the 2 anodes of an EZ80 via two 120 ohm resistors, so it is essentially a live chassis design. Not that this next is directly relevant, but it doesn't use the ubiquitous ECH81. Instead, an ECC85 is used as the AM Mixer/Oscillator, as well a performing the same function on VHF. The circuit was in one of the RTVC Books. I have a photocopy, but no means of scanning documets at this time, due to upgrading from W7 to W10.
