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Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


    Dumb humb question

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    Tom


    Posts : 217
    Join date : 2011-04-04

    Dumb humb question Empty Dumb humb question

    Post by Tom 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

    Tom


    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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