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Battery Box Noise

Discussion in 'Recording Gear and Equipment [BG]' started by jburtonca, Sep 6, 2003.

  1. jburtonca


    Nov 25, 2000
    Ottawa, Canada
    I recently built a battery box for my 1980's Radio Shack PZMs with
    instructions from:


    Before building this battery box I removed the existing ones and
    soldered XLRs to the cable coming from the PZMs. The only difference
    to the instuctions in the above link was that I used a single all-
    metal project box for both left and right channels. The poblem is
    that the box makes a noticable humming sound and aloud shrieking
    sound when they are touched. Does anyone know how I can correct this? Thanks