No further progress on the Baby Champ yet. I want to modify the output circuitry slightly. An electronics engineer friend of mine says the audio can be improved markedly on 5 and 6-tube AC/DC sets by replacing the 150 to 250 ohm resistor running from the output tube’s cathode to ground with a 5.1 volt, 1 watt Zener diode.
The diode insures a consistent, unchanging voltage on the cathode at all volume levels, which a resistor doesn’t.
I know I have a bunch of these Zeners but I can’t find them!
Would like to make the change while the 82 ohm voltage dropping resistor is out of the way.
Oh well, I’ll just keep looking..
- This reply was modified 7 months, 2 weeks ago by Eric Strasen.