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In Reply to: Mistake on DIY phono cables lead to ground loop with interesting observations... (long!) posted by bjh on March 4, 2007 at 13:57:31:
First, the teflon insulated silver wires would have ended up very close to one another (unless it was some teflon insulated like the Homegrown type, where the teflon is very thick), this would raise the capacitance of the twisted pair very high, and then adding a shield that was grounded at either end would add more capacitance. This might be enough to start softening transients or taming sibilance.Also, twisting the two cables together will RAISE the inductance of the shields, and promote cross-coupling betwen the two channels. These are normally not a desirable thing to do.
Second, you wrote:
"Surprisingly it didn't appear to need much, in fact when put on the tuner I discovered the Blue Jeans/Belden 89259 I had been using was causing some exaggeration of a mildly annoying sibilance problem (on DJ voice)"How do you know that the tuner is not inherently sounding that way, and the cable is letting it get through without any softening?
Always hard to tell without extensive comparisons between other cables, some known to not roll-off the HF's or soften transients. Very few people have ever said that the 89259 sounded like it was accentuating sibilance, although the choice of RCA plug could affect this to some degree.
Jon Risch
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Follow Ups
- Two things - Jon Risch 10:07:10 03/05/07 (1)
- Re: Two things - bjh 14:22:40 03/05/07 (0)
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