I accidentally (doh!) connected both negative wires of a phono interconnect to the preamp ground; now have bad hum...

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and I can't get the hum to go away with any grounding configuration. The two channels have equal levels of hum. It increases/decreases very slightly with different grounding configurations, but is always there. Did I fry something in the preamp's phono stage? What's strange is that the hum appears when any sort of IC (including shielded IC's) is plugged into the phono stage input jacks; there is no hum when no IC is in the jacks. (And no other inputs on the preamp have the same hum, thank goodness.) (Sorry for cross-posting, but I think this may be the best forum for this question.) Don't ask why/how I came to ground both channels of the IC; a late-night, too tired stupidity while attempting to solve another problem. Thanks for your thoughts.

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Topic - I accidentally (doh!) connected both negative wires of a phono interconnect to the preamp ground; now have bad hum... - Chuck 17:41:52 10/19/03 (3)

Re: I accidentally (doh!) connected both negative wires of a phono interconnect to the preamp ground; now have bad hum.. - hybris 00:16:17 10/20/03 (2)

unfortunately... - Chuck 08:15:08 10/20/03 (1)

Re: unfortunately... - hybris 12:21:23 10/20/03 (0)

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