Tube Amp Archive

while on this subject, heres a question... has anyone used RIFA caps, and how do they sound, bright, dark etc.

Andy, a good amp like pedal is the TIM. No kidding, also heard raves about the fetto (swedish). High gain tones.

I think my experience of this topic came when I switched a Mullard / RCA 5AR4 for the stock jj. There was a day or two in between, and I just noticed the amp seemed harder to play. Did'nt put 2 & 2 together at first, then put jj rectifier back. NIght and Day difference. If the amp had been rebiased,...

Interesting stuff. I'm making notes on this, and will probably try some rec. tube swaps to take the "hardness" out of it.

So is it always a trade off between filtering and choke ? If somebody put in
higher filtering , would it "cancel out" the feel or sound influence of a lower rated choke, say dropping from 20H to 10H or 7 or 5 ?

Heres a general amp question. If the AC30 used the same radio spares output trans. as the marshall jtm 45, why does jtm (can) use a 3H choke, and AC30 use a 20H ? Can somebody shed some light on this for me ? Much apprecited.