Well I checked and I was getting around 12Vpp. I've been doing some pedal works and even replaced the preamp tube just for a try, I did notice that only the low frequencies were causing it to crackle. I could hit high notes all day, but when I play an on E it would do it.

-BH

Thanks, Can you give me procedures for number 2?
Never had to measure power output on an amp before. I have a lot of components lying around and a digital multimeter.

Few questions to help me get started. What does the peak to peak circuit look like? I know the single diode single cap circuit.
Am I connecting the output wires that go to the speakers to the circuit? Once the caps have charged is it just a matter of reading the voltage across them?
Lastly I assume I use P = V^2/R, R being my "warm" speaker resistance?

Even at less than 12 o'clock on the volume, maybe around 9-10 it's crackling up. Is that normal then?

Will do, also upon looking at photos of when I cleaned it up I just noticed that filter cap looks a little torn on top and leaking on the bottom. Should I replace the one or all PS caps? It'll be a while before I can buy replacements.

Hi, forgive me if i'm posting this in the wrong spot.

Just got an old vox 30 that I cosmetically restored recently, the controls seem to work fine it's just that the louder sounds causes it to break up/crackle. It's annoying and I wanted someone's opinions on the matter. What I'm aiming for is a clean sound when loud on channel 1. Thanks.