[Bruce B]

These thoughts are are all quite interesting.  I wanted to mention that I haven't tried the C- + supply yet.  I am new to Battery radios.  Having work on many AC sets of the 30s, I recently decided to step back into the 20s and have been using an ARBEIII for my first 2 battery radios.  I decided to build the AES supply so I could give life to a second radio set when it is off my bench, I like listening to them while working.  I have only used the AES  on my 3rd battery radio, a Freshman Masterpiece 6F5 and it doesn't require a C- + supply.  The B+ seems to regulate well , at no load,  93 volts, no load, and with 5  01As and 5 volts on the filaments, the B+ drops to 91.5 volts  at 14 MA.  Not bad.
I'm hoping another AESBE builder can chip-in and explain how much ripple they have?  I look at the design of the B+ supply and because I don't see much thought given to the unregulated path for DC leveling, I start to wonder if they are depending on that pass transistor is ripple tamiing and it's not working some how?  I might stick a scope into the circuitry and see what I can see, but for now I will wait to see what the expectations should be.  I don't want to chase down something that isn't wrong.  If these supplies just hum, then I will just fix it with a PI design of my own.  The hum is not extremely loud, but loud enough to be annoying, it would send you in to replace the filter caps if it was an AC set. Keep the thoughts coming.?
Bruce B