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Questions about tubes and gear that glows. FAQ

RE: This is the schematic i am considering.

"I would not use NFB from the output trans secondary but plate to plate fb from the kt to the driver tube."

That kind of short loop NFB has a reputation for working best, when the driver is high impedance. The 6AC7 Octal pentode (gm = 9 mA./V.), with regulated g2 B+ and an unbypassed cathode bias resistor might meet your needs.

Eli D.

Edits: 05/01/17

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  • RE: This is the schematic i am considering. - Eli Duttman 10:25:22 05/01/17 (0)


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