Psst... Ready to join TalkBass and start posting, make new friends, sell your gear, and more?  Register your free account in 30 seconds.

Ground Hum Trouble Shootin Help Please

Discussion in 'Pickups & Electronics [BG]' started by ElScotto, Jan 22, 2014.

  1. ElScotto


    Jan 20, 2005
    Hi All

    I've dusted off my Bass Rig after a few years on the shelf.

    Ampeg B2R into Hartke 410 & 115.

    Got a major ground hum whenever I'm not touching the strings.
    Also disappears when I place hands on the Ampeg Head or the jack.

    Can I rule out the instrument???
    Major hum disappears when I touch the strings on my 70s P. It's fine in a mates practice amp.
    My electrice guitar is also humming when plugged in, and hum disappears when I touch the strings.

    Input jack is a little scratchy at times - ie squeeks and squarks if I twist the cable.

    I've used different instrument leads - the same issues regardless of lead.

    Scratchy jack a good starting place?
    SHould I try a different power cable?
    Speaker Cables?

    All advice appreciated.