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RE: Question from the peanut gallery

Hi Lew,

Hell if I know anything my friend.

Yes, and you notice, my test is at 3 mA. with my usual 15% step, to 3.45 mA.

A stiff supply IS a low DCR supply. It seems from my listening experiments, that Pentode G2 is super critical. Walter Key got it right in the 1970s by using a totally separate G2 supply. Later attempts at the Paoli 60M, with a different E.E., used more and more regulation, and the amps died (Paoli S.O.B. etc.). Dennis Fraker and I have discussed this over the past two decades, and we believe a separate supply, a clean one, IS the very best way to do G2.

What ever I did to improve the G2 supply, seemed to lock-in the amp's music making ability, just as much, (actually - perhaps more), than as if I was using 10 Ohm power trannies on the B+.

Honestly, it blew my mind how wonderfully the amp responded, on the speaker load (Fulton Premieres, P-12s), to my G2 power supply improvements.

I don't know all the theory, but that didn't hinder me from getting decent results !! I listened a LOT !! Tried a LOT of configurations, I had a LOT of fun doing that.

Jeff Medwin



Edits: 08/09/12

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