Uh-oh…What’s going on with my shielding? (Pics)

Discussion in 'Hardware, Setup & Repair [BG]' started by MMiller28, Jul 11, 2021.

  1. MMiller28

    MMiller28 Supporting Member

    Apr 27, 2003
    I recently got this bass and just opened the control cavity for the first time. What is going on here, and how concerned should I be? Do I need to have this redone?

  2. sissy kathy

    sissy kathy Back to Bass-ics Gold Supporting Member

    Apr 21, 2014
    Arbutus, MD
    It is copper, copper discolors. (My copper roof turned green, it still doesn't leak) Leave it alone until you start having shielding issues.
    RSBBass likes this.
  3. RSBBass


    Jun 11, 2011
    Yep, once again I find myself agreeing with Sissy Kathy. Copper oxidizes pretty quickly. Unless you have a problem leave it alone.
  4. dwizum


    Dec 21, 2018
    Almost looks like a rectangular outline of corrosion - I wonder if the battery is right under that spot, and leaked? If there's no obvious damage or issues anywhere else and the shielding has good continuity to ground, then yes, it's fine.
    Gilmourisgod and Lownote38 like this.
  5. MMiller28

    MMiller28 Supporting Member

    Apr 27, 2003
    Yeah that dark spot is where the battery is, but the current battery is fine, no signs of leakage. The bass is 15 years-old, so plenty of time for it to happen.

    Thanks guys, I'll just leave it for now.
    dwizum likes this.
  6. 96tbird

    96tbird PLEASE STAND BY

    Wash it off at least if there is any acid left. Just wipe it with water and baking soda.
  7. Gilmourisgod


    Jun 23, 2014
    Cape Cod MA
    Thats a battery leak, happened on a bass of mine I sort of "forgot" about. The acid eats right through the copper. The conductive adhesive copper foil is cheap, I'd just clean it off and put another layer of copper over it, like 10 minutes work max. Or not, if it doesnt hum.
  8. Except alkaline batteries aren't acidic, they are alkaline. Scrub the discolored area with a little bit of soapy water and and old tooth brush; wipe it dry and call it good.
  9. Arie X

    Arie X

    Oct 19, 2015