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RE: You don't wanna use that

Hi Russ - Educate me please. The only differences I notice from one side to the other are the 30 pf cap on pin 5 and the additional 27k resistor. I've seen other schematics that use the two 270k resistors only and I wondered why that 27k would be there.

Is this what makes it a paraphase? Would removing one or both of those parts make it more suitable for use with NOS PP 6B4Gs? Is there a circuit that uses a single 6SN7 per channel that would be better?

Any idea how much input voltage it would take to get full output with this?

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