hey! i have a music man 112 rd 50 and have problems to go with it, im not sure what the issue is but heres what she is doing. when i turn her on i have to turn the volume all the way up to get sound (at least 6 to 10) and then the sound is very muffled and clips in and out, it is not reaching anywhere near the volume it should, ive changed the fuse (it was not turning on at first fixed that) i have also changed the preamp tube and other tubes, they all work fine as far as ii can tell (there new they better be) any idea what may be going on??
If the fuse blew, something caused that (fuses going on their own are pretty rare). Chances are, you had a tube short which took out another component(s), and that took out the fuse. Music Man amps are actually kind of notorius for damaging the plate resistors when a power tube fails. I'm betting that's what happened, and now (even though you've replaced the power tubes), they're not getting adequate voltage on the plates to operate properly. Unless you know your way around a tube amp at the component level, I'd say take it to a good amp tech. Something like this shouldn't take more than an hour to diagnose and repair. Good luck. Greetings from Austin, TX Ken
It could be the the power supply (that provided power to the tubes) is not working. Just because the low voltage filaments are getting power and lighting up doesn't mean that the high voltage portions of the tubes are getting power.
The tip connector of the jack is commonly spring loaded - but that means the spring looses tension, it won't contact your cable properly. Replacing the jack is the very best solution, however you may be able to dig into the jack with a really small srewdriver and rebend the tip connector to make better contact.
