Earlier in this thread you asked me to comment on the Zener diode replacement for the cathode resistor in AA5 and AA6 sets.
Early this a.m., I was rummaging about in the shop looking for some knob felts. I didn’t find them, but I did locate my treasure trove of Zeners. The mailman just now dropped off another shipment of them. I now have enough diodes to last a lot longer than I will.
I really got to get organized…
I installed one in the Baby Champ. It works just fine, but frankly I can’t tell the difference in audio quality.
I have so many of the darn things that I will be putting them in every AC/DC set I open up, however.
I also tried the Northern Electric with a 10 watt, 82 ohm resistor in the filament string, figuring it might run cooler than the two watt carbon job the factory put in the radio.
The set is now running with a 50L6 and no resistor, as you originally recommended.
It takes me a while to learn, and that’s not advanced age. Been that way all my life.
I do have a nice six tube Bendix on the bench. It has a 4X6″ speaker and a Zener diode might make an audible difference there.