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In Reply to: RE: DIY cable - scratchy posted by Uncle Mike on January 08, 2011 at 04:45:22
Hi Uncle Mike - yep, I did try swapping in another set of "known good" cables (I mentioned that above), and the scratchy sound is not present.
Follow Ups:
Did you try to reroute your new cables to see if the interference you mention changes? If it does then I think you know where this is going. Shielding or rearranging your equipment if you want to keep those cables. DIY is a journey and you learn along the way!
Yep - i did switch the new cables around and the scratch was still prominent on the same side. So, yeah - might have to think about how my equipment is arranged, or look at shielding somehow.
With that construction I would think they would be pretty good at noise rejection. As a test you might try wrapping them in Aluminum foil to see if the problem goes away. The foil creates it's own problems so I wouldn't recommend leaving it.
Another thing to try is a bare wire (a thin gage will work fine) woven into your cable, tied ....AT ONE END ONLY... to earth ground. The screw holding the faceplate to the wall outlet should be grounded so use a crimp lug to get under it.
Edits: 01/08/11
Thanks for everyone's help. Just wanted to post an update.
I made a second set of cables, using fewer strands (2 per cable, so 4 in total) with lower gauge and larger diameter tubing - worried that the prior set had too much twisting and braiding going on.
I attached these, and the static was still there, but less so.
I started moving things around (components, wires, etc), turning things off, etc. I noticed that when the computer was swithed off, the sound went away. So, I do not think this is an oscillation issue.
Anyway, after considerable poking around, I managed to isolate the source of the noise to a power line Ethernet adapter that was connected to the computer (and to a nearby wall outlet). When I unplugged it, and switched to Wifi - the static went away.
I need a network connection as I store my music on an external NAS in another room. So, I ended up purchasing a (rather long) Ethernet cable and ran a hard wire to my router - and the static sound has gone away.
The cables sound great!
Cheers to everyone who chimed in,
J
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