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In Reply to: small dialectric like anticables or audioconsulting posted by beto1 on January 23, 2007 at 17:39:53:
Steve Eddy's Q cables. Very sound design reasoning and minimalist design using a proprietary alloy and silk.
Follow Ups:
On the DIY domain, there is, at least, 3 pre selection:
-Anticable
-ChrisVH's DIY fine silver
-Audio Consulting twisted pairs.All 3 of them has a similar aproach and are opositte to the traditional design. I wonder if any of this has problems with RF or other interferences. Maybe a third run, not connected can work, as I have read before.
some of you have tried this 3, or at least 2 of them?
Regards,
Beto
Good question, beto. I've read that in some environments, unsheilded ICs can pick up RF interference. That's not the case in my environment, fortunately.AC's twisted pair helps reject RFI because of the twisted pair nature, just like unshielded network cabling, but it's not as foolproof as a real shield.
However, as jnorv points out, one can shield some of these designs, notably ChrisVH's and probably Audio Consulting. I'd think the anti-cables would be more difficult to shield, though not impossible.
The trick to shielding is to keep the shield as far away from the signal-carrying wires as possible. Using some form of spacer, as beto jnorv suggests, is the best way to do that.
Here's another recipe that mainly uses an air dielectric with a shield. I've not tried them, but I don't see why something like that wouldn't work with ChrisVH's design.
wire for my phono cables. I experimented with 26 ga copper magnet wire first and it is not bad. In my environment I had to go with shields, at least for daytime use. Nights were not to bad for RFI. What I settled out on was 28 ga silver wrapped around 3/8" foam backer rod terminated in Eichmann's. Extremely low capacitance, 25 pF for a 5 foot run. I found some 3/8 ID foam pipe insulation which I put around the cables and then wrapped it with aluminum foil and grounded it only at the preamp end. I am considering going to 9 pin D-Sub connectors on the end that plugs into my TT arm. If I could figure out a slick way to rewire my preamp, I would put in a D-Sub for the phono input there. Unfortunately the RCA's are hard wired into the PC board.Jim N
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