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Post subject: Strange popping noises
Posted: Sat Aug 13, 2011 1:58 pm
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Professional Musician
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Joined: Sat Jul 19, 2008 4:27 am
Posts: 1513
Location: Southeast USA
My Twin is making some strange noises during practice. It does this on both channels. The signal fades and comes back. It pops and cuts out then comes back. Occasionally I get a microphonic squeal. I replaced the 6L6 tubes back in April. I've never replaced the preamp tubes. Is this a tube issue or is it time to take it to my dealer for a look thru? I hate lugging that thing around in my truck but I love the sound. :roll:


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Post subject: Re: Strange popping noises
Posted: Sat Aug 13, 2011 4:06 pm
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Unfortunately, could be something simple (like tube and socket cleaning), to something complicated. Try cleaning all pins and sockets with a SMALL amount of contact cleaner.

If still a problem, rotate 9-pin tubes (input, gain stage, effects, phase inverter) one by-one with a known, good substitute. If you still have issues after this, it could be bad solder point(s). Esp those to grounding areas. Or a bad cap, bad resistor. Or even some type of instability or oscillation. At which point, I'd recommend a good amp tech.

Good luck! Keep us informed.


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Post subject: Re: Strange popping noises
Posted: Sat Aug 13, 2011 7:18 pm
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Joined: Sat Jul 19, 2008 4:27 am
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Location: Southeast USA
Thanks I'll let you know. Hope its something simple. :lol:


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