Tube Amp Archive

Sorry guys for this silly question ... I just realized that I'm dealing with 2 tubes so my Bias is perfectly set.
6v6 max dissipation is 14 W , that means 70% off would be 9.8W, at 310V I should aim at 31mA max.
So my 62 mA divide by 2 tubes hit right in the bull's eye.

Hi again , I took a couple of readings from each cathode to the ground leg of the cathode resistor . It's a 270 ohm , but it reads 277 ohms. The voltage drops I read are very close : 17.40 V from one tube and 17.44 V from the other . I guess they are pretty close . I'm running my plates at 310 V . M...

Hi again , I took a couple of readings from each cathode to the ground leg of the cathode resistor . It's a 270 ohm , but it reads 277 ohms. The voltage drops I read are very close : 17.40 V from one tube and 17.44 V from the other . I guess they are pretty close . I'm running my plates at 310 V . M...

Hi guys , I'm new in the forum ; this is my first question . I just got 4 Marconi 6V6 on EBay for my 5E3 , but I don't own a tube tester ... Is there a way That I can use the amp itself to match a good pair of tubes as close to each other as possible ?.... maybe taking readings form cathode to groun...

Hi guys , I'm new in the forum ; this is my first question . I just got 4 Marconi 6V6 on EBay for my 5E3 , but I don't own a tube tester ... Is there a way That I can use the amp itself to match a good pair of tubes as close to each other as possible ?.... maybe taking readings form cathode to groun...