Weird hum situation... solved but not sure how

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Jetmaker737
Jetmaker737 Posts: 1,013
edited October 2009 in Basic Hookup/Wiring Questions
So I was hooking up a Yaqin tube buffer between my CDP and AVR (which is used as pre). When I powered it on I got a nasty hum from the speakers. Note that I already have a hum-x in my system. I have rat shack IC's for now that I intend to replace (along with the PC on the Yaqin).

While looking at the connections I noticed that I could make the hum stop to varying degrees by touching the input IC, having my hand near the input IC, having my hand hovering over the CDP, or re-locating the Yaqin. Relocating is what I ended up doing and now all is well.

Can anyone clue me in to what was causing the hum?
SystemLuxman L-590AXII Integrated Amplifier|KEF Reference 1 Loudspeakers|PS Audio Directream Jr|Sansui TU-9900 Tuner|TEAC A-6100 RtR|Nakamichi RX-202 Cassette
Post edited by Jetmaker737 on
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  • kcoc321
    kcoc321 Posts: 1,788
    edited October 2009
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    I had a pair of AQ that did that. When I took the ends apart, one ground wire was disconnected at the solder point and could/ would touch the positive. I replaced them and volia, no problem.
    I think you need new cables, IMO. Course yo do anyway....LOL
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  • danger boy
    danger boy Posts: 15,722
    edited October 2009
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    you probably grounded the IC when you touched it.. as kcoc321 said.. you may have an open ground solder or wire in your IC
    PolkFest 2012, who's going>?
    Vancouver, Canada Sept 30th, 2012 - Madonna concert :cheesygrin:
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  • zarrdoss
    zarrdoss Posts: 2,562
    edited October 2009
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    Not really this stuff can do some weird things from time to time. I was testing some speakers and I had an I-pod directly going into the amp. Suddenly I started hearing the radio come over the speakers, only problem it did it even when ever I disconnected the I-pod and just had the plug-IC going to the amp and it was some religious station to boot, weird!
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  • kcoc321
    kcoc321 Posts: 1,788
    edited October 2009
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    zarrdoss...God was speakin to you....hehe
    What did they say?
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  • Jetmaker737
    Jetmaker737 Posts: 1,013
    edited October 2009
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    Yep, my crappy IC's must be the culprit. Thanks! Another good reason to upgrade.
    SystemLuxman L-590AXII Integrated Amplifier|KEF Reference 1 Loudspeakers|PS Audio Directream Jr|Sansui TU-9900 Tuner|TEAC A-6100 RtR|Nakamichi RX-202 Cassette
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