TM 4100 no sound

  • Thread starter Thread starter mrbuggz
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mrbuggz

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New guy here, and needing some help. I just bought the tm4100 a few weeks ago. when I unpacked it and plugged into my cab, I couldn't get any sound out of it. Light was on, tubes were glowing, I had checked everything to make sure it was set up right. For about 10 minutes I turned knobs, switches, fiddled with cables, and suddenly it started working. All was fine the first 2 times I gigged out with it. Then the next time I played out, during the last set the amp went silent! All tubes were glowing light was on, etc.... Got it home, replaced power tubes, checked bias, played and everything was fine. Next weekend, same thing. After playing a couple of hours, the amp would go silent. Got it to the house, and couldn't replicate the problem. This weekend, on Friday the #2 channel would stop working intermittent. Saturday, the amp worked fine. I love the way the amp sounds, but I can't play out with an amp thats not dependable. Any suggestions on what the problem may be? Thank you all in advance.
Ken
 
Almost sounds like a short somewhere. Speaker cable maybe?
 
Len Rabinowitz":2kus1swr said:
Almost sounds like a short somewhere. Speaker cable maybe?
Click to expand...

Thanks Len, when it started acting flakey, that was one of the things I swapped. Didn't help. Also this weekend, the #2 channel would cut out to the point that it was unuseable. The other 3 channels worked fine. So that would lead me to believe that it's something inside the amp that's not right. I sent a question to Egnater company about 2 weesk ago. Still haven't heard anything. I sent Ian an email today, so hopefully I'll hear something from him.
Thanks
Ken
 
if you have a known good preamp tube laying around as a spare, i'd suggest swapping out each tube one by one and see if this fixes the problem. any 12ax7 will work as long as its in working condition.

report back after doing this.
 
Thanks guys, I've replaced all the pre amp tubes last night. I have a one-nighter this weekend, so we'll see what happens. The thing is, a few times I have played all night without any problems, so it may take a few weekends before I can really tell if that did it. I hope so......cause I REALLY like the way this amp sounds!
Thanks again!
 
yeti":1wxf2oop said:
what was the verdict?
Click to expand...
Made it through the night without it cutting out. It DID seem to lose
some sustain though, but that could have been just my imagination.
Gonna have to play through it some more before I know for sure
the pre-amp tubes fixed the problem. I have another one-nighter this weekend
keeping my fingers crossed.
P.S. I just realized I had a pm from you. Thank you for the info!
 
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