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  1. #1
    Wammer
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    Valve amp problem

    Hi all
    powered up my valve power amp this morning to a swishing sound in the left channel and a burning smell . Turned it off within seconds and the speakers thankfully have survived. Taken the lid off and at the base of each valve there are 2 resistors . These have cooked themselves on one of the valves only . Does anyone know valve circuit design , are these a final safety system if a valve goes short or would a faulty valve cause these to burn out ?? They are very low wattage resistors . A bit drastic I know but just wondered if anyone can shed some light on it for me . All was well when I turned it off before the fatal switch on !

    Thks Malc
    Last edited by Malc50; 10-06-2012 at 05:47 PM.

  2. #2
    Super Wammer
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    Which valve amp is it?

  3. #3
    hup two three four wammer
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    Malc, is this the Linear A?
    My blind guess is a squiffy valve shorting something. Those crappy EH valves werent my favorites (though brand new). PM me mate

    Sent from my GT-I5800 using Tapatalk 2
    I do not exist

  4. #4
    Cogito, ergo doleo. rabski's Avatar
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    Many alternatives, but the valve failing internally is one possibility. The resistors are not effectively a fuse, but will usually burn out if excessive current is passed for one reason or another.

    The one thing for certain is that unless you really know exactly what you're doing, then just replacing the resistors and bunging a different tube in is not a good idea. In all probability it's a cheap fix, but it needs to be fixed properly.
    I know that you believe you understand what you think I said, but Iím not sure you realise that what you heard is not what I meant.

  5. #5
    Wammer
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    Hi James

    It was I am afraid . Pm sent

    Cheers Malc

  6. #6
    hup two three four wammer
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    Crappy modern production rubbish, why do manufacturers use this shite?

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