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In Reply to: RE: A 6Y6GT/6922 P-P Amp with MOSFET Concertina Splitter posted by jyourison on March 28, 2015 at 10:32:15
Hi Jeff,
Wild amp !! Nice.
Are you still using the Bob Fulton TEK scope these days ??
Jeff Medwin
Follow Ups:
"Wild amp !"
The characteristics of the 6Y6 pretty well dictated the "route" taken.
The B+ rail was going to be "short". I wanted, circumstances permitting, to follow the KISS precept. The CCS loaded 6922 section DC coupled to "concertina" phase splitter seemed obvious. However, triodes can't swing close to the B+ rail, but FETs can. Enter the SS phase splitter.
Elements that work in a modest B+ rail environment were selected. An added bonus is that all the small signal devices exhibit high transconductance, which provides resistance to slew limiting induced by the GNFB HF error correction signal.
Eli D.
Thanks, Jeff. At the moment, the 'scope is being used by my brother, who does electronic repair. We're crunched for space at the moment, and when I get more room, I'll ask for it back.
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