Tube Amp Archive

Thanks for all the help folks. My first tube amp job was a success! 4x new caps, 3-prong plug, and all new tubes. Came with some Japanese Philips 6CA7's and some mullard 12ax7's but they were spent.

haha thanks Phil! That's an analogy that drives it home

New pads and rotors going on my truck as we speak and caps ordered

hawk

Not sure if the board warpage is an issue I need to deal with

Thanks Sluckey. I couldn't understand how I'd replace 4 with 2 as each diode seems to be an essential link in the circuit. Ok I'll do the power cord and caps, clean up as much as I can - good layer of nicotine on everything and it's like a shellac! -then power up and see what I got. PO used the amp ...

hey thanks Phil. There is good advice above but I'm not sure I understand it :) I'm happy to replace all that needs replacing without much consideration to cost as this amp deserves a new lease on life. I'm mostly confused with the statement above that I can remove the 4 old rectifier diodes and rep...

hi all, I'm new here. I've been recently bitten by the tube amp bug. Bought a Yba-1a last year and I'm in love with it lol. Just bought a 72 Yba-4 that has had very little work done on it - just bias caps and V1 socket replaced as far as I can tell. So, time to install a 3 prong cord & replace the f...