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Hey guys.

On Sunday morning my Classic 30 started making a constant 'whooshing' sound (like when you put your ear to a seashell), and when I tried to play it would occasionally make a crackling/shorting sound, like when you're using a crap/old/broken lead.

Is it the power tubes? I'm not sure when last the tubes were changed, but it's never done anything like this before. I've tried pressing my finger against each of the tubes but there's no change in the sound when I do that.

Thanks all!
    Stubbs wrote: Hey guys.

    On Sunday morning my Classic 30 started making a constant 'whooshing' sound (like when you put your ear to a seashell), and when I tried to play it would occasionally make a crackling/shorting sound, like when you're using a crap/old/broken lead.

    Is it the power tubes? I'm not sure when last the tubes were changed, but it's never done anything like this before. I've tried pressing my finger against each of the tubes but there's no change in the sound when I do that.

    Thanks all!
    Do the tubes "light up" still? Cos I can't really touch my amps tubes while it's running...
      Sounds like a preamp valve. The seashell noise is something I've come across a few times. A tap with a pencil on the glass often finds the offending chap. Otherwise use a known good valve and swap one at a time and test.
        They all light up, although before the whooshing sound I noticed that there was a rattling sound coming from the middle preamp tube (V2 I believe), which would stop if I pressed my finger against it. I know for certain that it was this tube because I had a custom "tube tamer" put in for the power tubes and none of the other preamp ones made that sound.

        Could it be the preamp tube?
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