help with tube amp hum coming from speakers ;(

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Hi, just got some Jolida JD3000 amps and am getting some hum from both speakers. My system is a Tact 2.0S preamp/DAC (full Aberdeen mods) - SB2 with full Bolder mods and an Aberdeen PS and a BPT PC. The SB feeds the Tact via digital out. If I disconnect the interconnects(BMC) from the amps I have absolutely NO hum - dead quiet. Once I connect the preamp I get hum. The amps and BPT are on 3 dedicated 20amp circuits. The SB PS and Tact are plugged into the BPT. I tried a cheater plug on the Tact - still have hum. All my cables are nice and seperated - none of them touch. Any ideas? Maybe shilded IC's? With my Butler amps I have absolutely no noise in the same configuration.
Thanks for any help!
Tony

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Topic - help with tube amp hum coming from speakers ;( - mantis007 14:03:02 07/24/06 (0)

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