• 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.

looking advice for 833 tube amp

hello everyone, I 've been a diyer when was young. Kinda paste and do it. Of cos gain some experience from learning on google. Start from pp amplifier to single ended. 300b,,,211 and 845 with 1850v HT... recently interested of 833 se...but have some issues.

Refer to the photo below, block A,,,,thinking of using ccs,,,40H choke or ccs 2a3 set at 40mA for ,,,4p1s set at 25mA,,,or maybe a pure resistor?And I have issues when using SMPS at heater supply cause buzz sound . This 833 with amplification factor of 35,,,I m wondering if can drive it with high voltage MOSFET solid state driver or not?
 

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