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833A's plate color



Original poster: "Angelini, Frank J" <FrankJAngelini@xxxxxxxxx>



I am running an 833A based coil. The tube is NOS RCA from a now defunct AM radio station. I have approx. 3000 vac on the plates. I'm getting a nice 18 - inch brush discharge, but the plate color is bright orange. I have been told that I am pushing this tube. Is this correct? What should my plate /current/current be? How can this be measured?

Thanks