• 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.

EL34 to RL12P35 converting


I had for 2 years ago build 2 small SE amplifiers based on EL34 (Design Tom Schlangen).

Now. I want to build 3 more for a 5.1 amplifier. This is no problem.

My problem is, I want to replace the EL34 with RL12P35 tubes (have 20 on stock).

I have problems understanding the Germans datasheets.
I understand the G2 voltage is max 200V but what is G1 voltage when b+ is 425 to 450 voltage and the anode current is 50 mA.

Can any help me???