Kalamazoo
Skip: I have a Kalamazoo 2 that has a hum. I was reading your other post and you were saying this might be normal. Dave Barrett played my amp and said it needed to be fixed. The thing that's interesting to me is I can give it a tap and the hum will stop. Do you have any advice? I live in San Jose, CA... if this an be fixed I'm thinking I'd drive it to the Delta to have you work on it.
I was playing my Kalamazoo 2, which was sounding great to me, when suddenly there was no sound at all, except for a couple of crackles that I have not since been able to reproduce. I thought I might have detected a slight burning odor initially, but if so it passed quickly. I tested the speaker, which works. All the tubes light up. There is no one within 100 miles who works on tube amps. I did get the guy at the music store to swap out the AX7s (the only ones he could match), but new ones made no difference.
The amp was supposedly re-capped in the past couple of years, and it has a three prong plug, but I don't think any other mods have been made.
I guess I'll have to ship it somewhere for repair (a frightening thought), unless there is anything else I can test with a multimeter and my eyes?
Thanks for being here!
Hello Marcos- Thanks for writing. I believe that troubleshooting an amp without seeing it is rarely successful. Something is wrong with your amp, but there are an awful lot of things that could be causing or contributing to the problem. I'm afraid that you are going to have to let someone look at it. This forum is not intended to promote my own repair business, but you are welcome to email me at my website about getting it repaired.
Skip
Hello Jon- In this case, you may have found the clue yourself! If giving the amp a little tap will make the hum go away, that is some type of intermittent connection inside the amp. A likely culprit is a tube pin that is not making good solid contact with it's socket, but of course it is impossible for me to be sure without seeing the amp. Dave is right. You need to get your amp fixed.
Skip
Skip Simmons Amp Repair