The Amp Garage

Running it with a 100 watt bulb. Imagine that should be overkill for an AC15. Anyway, I'm going to start from scratch using wall voltage, measure everything so I don't accidentally blow out any caps (they're all at least 475V, should be fine). If I run into an issue I can use the variac to get it to...

Thanks! So before I started pulling them I figured I'd just measure the bias. The tubes are running SUPER cold actually, these are the numbers: V5: Plate voltage (to cathode): 211.2V Primary resistance: 130.5 ohms Voltage drop: 2V Plate current: 15mA Plate Dissipation: 3.17W V4: Plate voltage (to ca...

Appreciate the replies. Took me longer than I wanted to get around to it, but I overhauled the thing to be sure. I wanted to track down a specific bad joint or something, but with all the factory wires run on the bottom of the turrets, I just assumed there was too much lead free solder somewhere mak...

Thanks. I had to clear my bench off to do a guitar setup and probably won't have much time to get back to it until Sunday, but I'll definitely go through it, I plan on pulling the board to be sure, and I'll probably just re-flow pretty much everything to make sure it's all solid. It all seemed to be...

Hey all. I'm really hoping some more experienced folks than I can help me troubleshoot this thing to figure out what's wrong. I'm trying things as I think of them or learn more, but it's getting aggravating. Some background: This is an AC15 I have heavily modded in that I replaced literally every co...