Problem with power supply filter capacitors in late-50s Gibson GA18 (GA16)

[slidincharlie (Carlo P)]

Good day and merry Christmas everybody :-) .
I have an old Gibson vintage amp (that I DO love) that is labelled GA-18.
Actually its circuit matches...

[bobloblaws]

Awhile ago I bought myself 67/68 silverface Twin Reverb with the AB763 circuit. One of the first things I did was replace the original Mallory filter caps....

[Habbe]

Greetings all,

I think I understand pretty much everything in here:
The Valve Wizard

But one thing is unclear: what is...

[evil79]

So I'm working on a 1969 bassman and noticed there's one more filter cap than on the schematic, or on any of the bassman schematics that I've seen. I've noticed...

[jaysgr]

Hello,
I am quite new at the world of electronics and new at the forum too, and I would appreciate some help.
I have an old Fender Amp which...

[Wittgenstein]

I have the head to a Super Six Reverb that could use some new filter caps. The amp currently has two 70uf 450V and three 20uf 600v electrolytic caps under...

[wheatley]

i'm recapping a push pull MV twin and i noticed that many of the resistors are far from there spec values. for instance the power tube grid resistors are...

[Stevie B]

In an attempt to get more "umph" out of my amp, I tried bigger caps for the main B+ filter.
I am using a solid state rectifier (diodes)....

[robotman]

Hey guys I am running into some problems on my new build of an AB165 Bassman. The main problem is massive hum if I hook the output transformer red lead in...