The voltages across those doghouse caps read as high as 456 volts when powering up then the highest one stabilized at 305 volts after about 10 seconds.
Are F&T 22 microfarads 500V suitable replacements? or the 16 microfarads a better choice? The bulging doghouse caps are currently Mallory 20 microfarads 450V.
I suppose since those are bad I might as well replace the cathode bypass caps too. I understand to keep the blue molded caps. Do you have a suggestion for the capacitor brand for those and the power supply filter cap?
Also, Thanks for the shorting out the Vibrato pedal knowledge you are awesome! However, no luck on getting it to work. I traced the circuit around through the pots down to the optoisolator, to ensure wire continuity and swapped the tubes around. The optoisolator bulb read 7600 ohms. Is that normal? I will also order the .01 and .02 ceramic caps.
Any tips about the optoisolator if I order the one for a tremolux from amprepairparts.com? That should be the correct type?
Thanks again vinyl for the help, I really want someone to have a decent amp.