• 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.

PS Chokes in parallel?

If they match well enough.

But a parallel inductor connection halves both the inductance and the resistance.
This is due to both resistor and inductor reactance being proportional to R and L respectively.
Capacitor reactance is inversely proportional to C, so parallel capacitors do add.