WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.

Phono Pre-Design Input

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should be 619R?

PB

philipbarrett said:
should be 619R?

Or 620R, yes.

If that/s not it check if the heaters are wired right.

Sayonara

I grounded the heater center tap (somewhere in the thread it was recommended) maybe I shoudn't have?

PB

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