Tube Amp Archive

which amp are you putting tremolo in? I just noticed that on the area51 site they say that the bias modulation method may not work well with cathode biased 6V6 amps and that you should convert to fixed bias if you want to use the method. I tried the circuit on a GA30 pre/deluxe power amp that I made...

Micky, sounds like you solved your problem. Great work. I do not remember what voltages I was seeing, I did this mod a long time ago. I also put a switch to lift the grid resistors from ground into the intensity pot so that I could turn the tremolo on and off. You can see the same bias modulation tr...

Micky, I built that tremolo circuit my DC30 clone and it is fantastic, best tremolo I've ever heard. My buddy then built the circuit into his clone and had problems similar to what you have (very weak tremolo). He was using a hammond PT and concluded that it just did not have enough juice to get the...