abdul_tom
Joined: Dec 04, 2006
Posts: 251
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Posted on May 24 2023 06:00 AM
I've got a "well used" 1961 Tremolux that I picked up a couple of months ago. Was working fine and I was enjoying using a load box to crank it huge gobs of gain, but I thought I'd better take it in for service.
I just got it back yesterday and I'm getting weird feedback if I try and crank the volume and tone knobs on the bright channel. It wasn't doing this before. Any other brownface users here who can testify whether this is normal?
Here's a rough and ready video I made for the tech.
https://drive.google.com/file/d/1UIFGnpvfjlHMpNO81mchCGTqHoh28EO3/view?usp=sharing
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terma_reverb
Joined: Apr 17, 2012
Posts: 40
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Posted on May 25 2023 01:22 AM
It does not sound like normal to me, but I cannot identify the problem either. All I know is that the brownface showman clone I have does not do that, I have no prior experience with a Tremolux. I hope you find the issue and please let us know what it was.
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SandBug
Joined: Feb 22, 2016
Posts: 439
California
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Posted on May 25 2023 01:30 AM
Congrats on the Tremolux! I just heard one in person the other day, they sound amazing.
This won't be of much help. Sorry.
I have a 1962 Showman, I've never heard that sound come out of it. But i also don't run it on 10 or use a load box.
Did you notice the sound before you took it in to the shop? or only after? If so then i would think it's something that the guy at the shop changed.
I don't know if that's normal though.
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Tqi
Joined: Dec 07, 2014
Posts: 1222
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Posted on May 25 2023 01:56 AM
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Last edited: Feb 02, 2024 16:14:38
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Boulder_Bob
Joined: Mar 29, 2006
Posts: 130
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Posted on May 27 2023 04:07 PM
you could try pulling preamp tubes starting with V1 and when (if) the noise stops you have isolated where in the circuit the issue if
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Boulder_Bob
Joined: Mar 29, 2006
Posts: 130
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Posted on May 27 2023 04:09 PM
do you still have the old tubes you took out? try putting them back in
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abdul_tom
Joined: Dec 04, 2006
Posts: 251
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Posted on Jun 07 2023 02:32 AM
Thanks for all the responses. I tried a couple of things but no joy, so it will go back to the shop. Definitely not a tube issue. It's some kind of internal oscillation but I'll get him to sort it.
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