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allan · 6th Oct 2019, 12:08 am

I guess its time to trace the circuitry around those two pots. Combined AF/RF gain might be feasible?

The valve I think is the "TRF receiver" is fed from early in the IF strip and I recall had a KTZ63 plugged in but I think Pin 6 is used which doesn't seem right. I thought it might be an anchor point but its a screened wire by itself. An octal-based valve with top cap and Pin 6 used? I may have misread this but maybe a double diode pentode with g3 strapped to cathode? Maybe a 6B8 but that would make Pin 6... g2? Maybe a magnifying glass is called for...
Allan G3PIY

6th Oct 2019, 12:08 am	#52
allan Pentode Join Date: Oct 2005 Location: South coast near Ringwood/Christchurch, Dorset, UK. Posts: 230	Re: Moreton Cheyney I guess its time to trace the circuitry around those two pots. Combined AF/RF gain might be feasible? The valve I think is the "TRF receiver" is fed from early in the IF strip and I recall had a KTZ63 plugged in but I think Pin 6 is used which doesn't seem right. I thought it might be an anchor point but its a screened wire by itself. An octal-based valve with top cap and Pin 6 used? I may have misread this but maybe a double diode pentode with g3 strapped to cathode? Maybe a 6B8 but that would make Pin 6... g2? Maybe a magnifying glass is called for... Allan G3PIY