markn2wae
Mark T N2WAE
Years ago I "FET-ted" a two tube RCA RADIOLA table top set and then just ran it off a single 9 Volt battery, it worked quite well. 
I don't remember the circuit I used with the FETs, but I may have lowered the source resistor used in the audio stage for more output, if I find any details of how I did it I will re-post.
Mark T.
I don't remember the circuit I used with the FETs, but I may have lowered the source resistor used in the audio stage for more output, if I find any details of how I did it I will re-post.
Mark T.
I've seen setups where people have done it with a FET, an LED and a photocell to retain the original filament resistor volume control method. I've also seen subminiature tubes used and adapters for various other things.
I've considered that for my own set, but I don't have the tube bases I'd need to make it go without having to actually modify the radio.
I've considered that for my own set, but I don't have the tube bases I'd need to make it go without having to actually modify the radio.