Tube DIY Asylum

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RE: Starting to lose me.....I think I understand......

Posted by Eli Duttman on December 2, 2009 at 18:53:11:
"Found this design that I think could work. What do you think?"

That's an "interesting" hodge/podge. A paraphase splitter driving a differential amp. Unfortunately, for good cause, paraphase splitters are out of favor. So, forget that design too.

It seems that you want a well proven "road map". OK, I've got a real good 1 for you. It's the Harman-Kardon Citation V. "Steal" the Cit. 5's small signal circuitry and use "fixed" bias triode wired "finals" into the O/P trafos currently in situ. SS rectify the B+ and use the "5" VAC winding to energize the heater of the 12BY7 voltage amplifier, in a "6" V. setup. The 6CG7 shown in the schematic is 100% electrically equivalent to the 6SN7 now in place. ;>) AA sponsor Jim McShane is THE expert on H/K tubed Cit. units. Send him an EMail about the project. Undoubtedly, Jim will have parts you can use at a fair price.