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ll I want for Christmas is no more hum!

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  • #16
    Replace the main smoothing capacitors if 120HZ hum.
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    Don't forget to remove the death cap and fit a three core earthed mains lead, if it hasn't been done before.
    Support for Fender, Laney, Marshall, Mesa, VOX and many more. https://jonsnell.co.uk
    If you can't fix it, I probably can.

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    • #17
      Are you able to tell if it's 60Hz or 120Hz hum?
      Can you post some pictures of the V3 & V4 area as well as the circuit board?

      Also, in post #2 you said with the .1 coupling cap disconnected, the hum was still there. Now the hum goes away when you disconnect that cap?
      Originally posted by Enzo
      I have a sign in my shop that says, "Never think up reasons not to check something."


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      • #18
        so...

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        "Take two placebos, works twice as well." Enzo

        "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

        "If you're not interested in opinions and the experience of others, why even start a thread?
        You can't just expect consent." Helmholtz

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        • #19
          Finally fixed! It was a bad rectifier. Thanks Jon, Chuck, and everyone for your help.

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