20-10-2017, 10:30 AM
I can't see any obvious HT feeds to the wavechange switch, there seems to be no switch removing HT from the frequency changer or IF valves when in the gram position which was the problem I had with the Murphy.
What happens to the triode part oscillator grid voltage when you switch wavebands? If it is only on MW, it has to be a coil or trimmer or the associated switch contacts that are only used on MW.
Can you scope the triode grid?
What happens to the triode part oscillator grid voltage when you switch wavebands? If it is only on MW, it has to be a coil or trimmer or the associated switch contacts that are only used on MW.
Can you scope the triode grid?
Boater Sam.
