• 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.

Class D driving 805 AB2 PP

Is it supposed to work?

Small class D amplifier driving an AB2 805 PP through a 1:12 transformer.

500V 50mA on each 805 (internal resistance about 13K), max g1 swing about 170Vpp for 35W output on 8K load, max Ig1 about 45mA per 805.

OPT: TTG-CFB8000PP - Tube output CFB transformer [8kOhm] Cathode Feedback Push-pull - Shop Toroidy.pl

I don't understand CFB, do you have an idea of how much the internal resistance of the tube will be reduced to? and what additional drive swing required?
 

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