• 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.

Ongaku 211 and Supravox 215

A greeting.



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Hi, i post my question here too
I have just finisched my ongaku and I am looking for good tensions. (pictures are on my thread “ongaku”)
I now 860V. But are the other values good?
For example to have –50V (-50 is the good value), It is not
–200V but – 155V.
Are 460 and +200 the good values?
Do you know the good value for the pin 1 of the 6072 and for pin 1 and 9 of the 5687?.