• 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.

6U8 input stage question

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dragonweed

dragonweed

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Joined 2010
Hi folks!
I have some experience in tube amps, but not very good at the theory part.
.Could anyone tell me the -open loop- gain of this circuit, (with bypassed cathode R) and the cathode potencial of the triode part? The B+ voltage is 270V.
Thanks for the effort!
 

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