Keyboard non-static shocks

Discussion in 'Mac Basics and Help' started by Jordashebasics, Feb 4, 2008.

  1. Jordashebasics macrumors newbie

    Sep 13, 2007
    While I've seen the threads about static shocks from the "new" aluminum keyboard, I've got a slightly different issue.

    When I plug in my bass to the amp, if I have one hand on the strings, and the other hand touches the keyboard, I get a shock. Maybe shock isn't the right word - I can actually feel the current passing through. It's not a very powerful one, but it's enough to be uncomfortable.

    The amp is grounded. I haven't had any electronic problems with the bass at all.

    Any ideas?
  2. Makosuke macrumors 603

    Aug 15, 2001
    The Cool Part of CA, USA
    Just a guess, but I'd say you have wiring problems.

    In general, that sort of thing is a ground loop problem--that is, because they're grounded at different points, the ground of the amp is different from the ground of the computer (and unless I'm mistaken, the keyboard's frame should be connected to the computer's ground--I just tried to test, but the paint/coating on the aluminum means I'd have to scratch a hole in it to find out).

    However, a ground loop shouldn't produce enough voltage differential to do more than add a hum to your amp or speakers--if you can feel it that's way above what's normal, and most likely also above what's safe. If the wiring in your house/apartment is messed up, it could do that. They sell little testers at the hardware store, and some UPS units (even some surge suppressors) will tell you as well.

    If that is what's going on, you definitely need to get it fixed.

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