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That's good for 700 watts worth of anode dissipation. I don't think I'd want to take it past 1,400 PEP for fear of the notorious internal tube arc. Turns out the data sheet does provide a graph with the curve for bias and indicates this should be showing someplace around 40ma. of idling current with 2kv on the plate and -19 volts of bias.


You would be surprised if you connected a grid meter to see what they draw for current. You might think you were looking at a plate current meter when it comes to these Russian tubes. For the brief period of time I kept three GS35B's on an RF deck, they typically managed to draw in the neighborhood of 1 amp of grid current! Grid over current protection is a good idea for these Russian surplus tubes and the Ameritron GOP-100 accessory board, makes this an easy addition to many triode amps.