Tube Amp Archive

I can't help but think that this is a paristitic osilation. Maybe a grid wire is a fraction to long or in the wrong position or any number of paristitic remidies. Also are the transformers positioned in relation to each other corectly.

If your talking about the 1164 princeton reverb then the phase inverter is a cathadyne phase inverter? Have not had any experience with them but I think they are very difficult to get a clean output from. One option could be to play with the bias resistors on it or to change it to a long tail pair p...

Thanks for the reply. I'll explain that I had a real farty bass problem and a harsh top end. So some normal changes are to lower the bypass caps on the preamp i just didnt like it in this circuit. But i found that the lower voltages on the 12ax7 definately softned the upper register. The 4700pf in t...

Mad dog i have used evatco before and found them very good. always got a discount and cheap shipping. However i rang them earlier today and they are not there at the moment due to death in the family. azz

Hi to all. This is a first time post although I've been a regular visitor. Anyway I have finally come to a point with my 6l6 blackface design where i am actually happy with the sound. There are a few things I've come to realise with that design that i would like to share to see if any of you have ha...