• 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.

voltage dropping resistors

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#21
With what we know from the TS and the tube datasheet it could be something like this,
V1.png

There is, with this way of getting the negative grid voltage, no stabilising cathode resistor.
To adjust for differenties between tubes I sugest to make the serieal resistor to the supply (550V) ajustable.
Mona
 
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