Tube Amp Archive

If you have a audio generator pump in zero DB into the effects return jack , if you get a little better audio volume out of the speaker then I would say that the amps PI section and output section are ok. Better yet if you have a mixing board take that output and drive the return jack with + 4 DB. ...

Turn all 3 effects related pots up to 5 and then jump the effects send and return jacks with a cable, does the amp then play ? Thanks for your answer Stevem! I try your way but with no luck.I am tracing the signal with an oscilloscope,and I see that theres no signal on V5 grids (Pin2,7) thats the p...

Thanks mate!I'll give it a try!

Hi guys!I have a Rivera KR7 and suddenly has no sound output.You can hardly hear something from the speakers if you crank up the 2nd or 3rd channel.I have swap all the tubes and I have also check the signal path in the preamp section and it seems to be ok.I have some experience on building some hard...