Ampeg Reverberocket
Ampeg Reverberocket
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 Ampeg Reverberocket II GS 12 R Guitar Amp Vintage 1960S  US $643.08
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i need help biasing tubes?
ok so i need help with biasing my tubes for my 1962 Ampeg Reverberocket model number R-12-R. the power and rectifier tubes that i just replaced are the 6V6GT and the 5Y3GT. they need to be biased but i need something to explain how to do it. i have drained the power out of the amp so that it is safe.
no actually they need to be checked and biased because the other tubes are at their normal temp and usage. the 5y3 and 6v6s are going too hot and heating too fast. the 2 6sl7s and 2 6sn7s are at their normal temp and usage
You question is puzzling to me. The circuit should already be wired for the necessary bias. If it doesn't have it, how did it work in the first place? Your rectifier tubes certainly don't need bias. They just recitfy and are normally triodes. A 5Y3GT is a full wave rectifier and has a filament/cathode and 2 plates. There's no screen grid to bias. See the first link below.
The 6V6GT is a pentode and does need screen bias. See the second link below for details. But the bias circuitry should be in the amp. Check for voltage on the screens and the plate if your amp isn't working.
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