Tube Amp Archive

just did it again trying to post my comment.......hmmmmmm

I get these errors every time I click on a different thread on this forum. Or anything I click or tic however people say it.

Thank you for your reply. I'll change my bias back to -31v unless You think it should be higher. I was thinking between -31 to -35. I wanted to mention I put a multimeter on my gain Potentiometer Set it to millivolts connected negative lead to ground lug POS to center lug Reading was -0.266 Does thi...

I'm still trying to iron some more things out, and have been finding flaws in my build. I've corrected those. Now V2 voltages aren't looking very good either. Here's a list of my voltages.  V1  PINS  1-185.1 2-0 3-1.139 4-0 5-0 6-239 7-0 8-2.09 9-0 V2 PINS 1-89.3 2-0 3-0.640 4-0 5-0 6-341 7-89 8-92 ...

Just a clarification on the diagram from Mojotone I rechecked and I apologize I feel like an idiot. The one I built is the 1976 model. The 76 model shows a 330k resistor from pin 1 to pin 6. On the 1978 model it shows the 100k resistor. I've changed the bias setting to -41 volts it was -31 and that ...

All the wiring is correct but the 330K should be 100K. So, just replace the 330K with a 100K. Don't change anything else! Thank you much. My mistake though. The diagram they sent me was correct a 100k resistor. The diagram from the web sight listed a 330k resistor. And I was referencing that diagra...

Hi everyone I have a diagram from Mojotone British 50W 1976 2204 Rev 3 03/31/2025 On V2 it's showing no connection to pin 1 only a 330k resistor from pin 1 to pin 6 and a bus wire from pin 1 to pin 7 and a wire from pin 6 to a 50+50 can cap on the board is this correct??? I'm getting a voltage readi...