Large tube amp POPS when turned off

Discussion in 'Amp Tech Center' started by ArcticWhite, May 18, 2019.

  1. ArcticWhite

    ArcticWhite Tele-Meister

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    Portland Oregon
    My old Valco makes an extremely LOUD POP when I turn it off. It does not have a standby switch. It has a solid state rectifier.

    None of my other amps do this.
    I realize that I could turn down the volume before switching it off, but that is not the solution I'm looking for.

    I figure there's a good place to run a cap or a resistor to prevent this. Anyone?

    (I've already installed a grounded plug, and removed the death cap)

    20190518_065402.jpg
     
  2. schmee

    schmee Poster Extraordinaire

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    It's common with Fenders too when they are old. Often it is bad contacts in the switch. But it can be other things too. Yeah if you try the switch and that doesn't do it, then a cap can be used but I forget where. Switch to ground I imagine.
     
  3. BobbyZ

    BobbyZ Doctor of Teleocity

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    Try just unplugging it and see if it pops.
     
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