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Help What's this annoying amp noise?!

Discussion in 'Amps and Cabs [BG]' started by madjazzbass, Aug 1, 2021.

  1. Aug 1, 2021 #1
    madjazzbass

    madjazzbass Supporting Member

    Jan 5, 2014
    Earth
    Can anyone tell me why that, when I turn my amp on (GK Fusion550), it sounds like there's a major thunderstorm approaching; usually last for about 5 sometimes 10 minutes long and then it doesn't do it anymore for the entire time that I'm playing/practicing, but it happens every time I turn my amp on. Thanks in advance.
     
  2. Aug 1, 2021 #2
    byacey

    byacey

    May 16, 2008
    St. Albert, Alberta, Canada
    This can be caused by plate load resistors going bad, or bad / loose tube sockets. It would be best to get it to a technician for proper troubleshooting.
     
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  3. Aug 2, 2021 #3
    madjazzbass

    madjazzbass Supporting Member

    Jan 5, 2014
    Earth
    Thanks Dude, much appreciated.
     
  4. Aug 2, 2021 #4
    JKos

    JKos

    Oct 26, 2010
    Surprise, AZ
    You could try reseating the tubes first. If no change, swap the tubes around (change positions) and see if the nature (sound) of the noise changes. if it does, then you likely have a bad tube. If moving the tubes around does nothing, it's probably not a tube.
     
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  5. Aug 2, 2021 #5
    byacey

    byacey

    May 16, 2008
    St. Albert, Alberta, Canada
    Bad sockets will usually show up by wiggling the tube slightly within it's socket while operating, but it could also be mechanically sensitive / intermittent components soldered to the socket's lugs.
     
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