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    Dumb humb question



    Posts : 166
    Join date : 2011-04-04

    Dumb humb question

    Post by Tom on Thu May 05, 2011 6:16 pm

    I was rereading Ed's sp-12 build thread and have a noob question about hum.
    I read that his humms with the power off and is louder with it on.

    1) Do ground loops only hum with power on or both on and off?
    2) Mine (SP-8 ) only hums with tubes in and power on. Line tubes out, power on, no hum. Does this still sound like a ground problem?

    Going in circles Smile


    Last edited by Tom on Thu May 05, 2011 6:18 pm; edited 1 time in total (Reason for editing : edit: oops gotta watch that 8 and parenthesis together)

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