Fender Bassman Update

I was wrong. I wasn't a blown capacitor. It was two blown resistors. And a blown capacitor. The smoke was from the resistors though, not the capacitor. The good news is that these are cheap parts; two 100 ohm resistors and a 5uf capacitor. I have no idea why they blew, but if i had to guess I'd say it was due to age. It should be an easy fix.

Amp Guts Porn:




Here you can see the two blown resistors


Blown cap in the bottom of this picture. It's really hard to see.




Another view of the blown cap.

Where There's Smoke...

Well, no fire, but there was smoke.

I was jamming with a friend on Sunday, playing thought the Fender Bassman when suddenly no sound. Initially I thought a cable had a short in it, so I started kicking and jiggling things. Then the smell. Caustic. If you have ever smelled it before you immediately know what it is. Burning electronics components. Panic.

I turned around and saw smoke coming from the Bassman. I ran over and unplugged it.

I'm 99 percent sure a capacitor blew in the power supply. Hell, the thing is over 40 years old. I'm not surprised. At least I have another project...