Buzzing sound but no sound from guitar.

[jamowil]

I have an old Peavey Classic hybrid amp, 50 watt, tube power amp, SS pre. When you switch the amp on all that happens is a temendous amount of hiss comes...

[AndyM]

I just bought this amp today and don't want to break anything. I heard from someone that if I wanted to change the rectifier mode (this amp has 3 modes: Solid...

[priesty]

Hello all,
Just want to put this idea out there for implementing a dual rail power supply for running valves such as 6550's at design maximum ratings....

[DarkestAsh]

I know this is probably a dumb question, and I'll probably figure it out after some trial and error...but just in case I don't...

I have a...