[462ron]

Interesting history John on these old sets and RCA, history I don’t know nor have ever read. I guess I really should bone up on this and the peculiarities about these early tubes that Chas mentioned as it is interesting and is relevant to my AK. Anyway, I don’t have any headphones but I am using an output transformer and speaker from an AA5. I also have an old output transformer lying around that I’m not sure what it came from as I think it was part of the stuff my dad had when he did radio/tv repair in the late 50s early 60s. I tried it and it seemed to be a tad louder so this leads me to wonder how much the distortion has to do with a mismatch of impedance here! As a last ditch effort, I did swap the 200A for a 01A but I didn’t notice much difference in distortion. Maybe this experiment might be better done on a superhet set with more amplification and known performance. I’m leaning towards reverting back to original factory design where I was getting a few more stations and let it be!

Ron