Re: Which effect?

Posted by bartc (A) on December 19, 2003 at 06:44:56

In Reply to: Which effect? posted by S on December 19, 2003 at 06:14:43:

Not sure whom you're asking what.

In my system (NAD amp & CDP) the captive little power cords were not at all effected by my spiraling around them a 10AWG copper insulated wire in a configuration mimicking the Power Wraps. Nothing, nada, period. I did not assume that these cords were shielded, but didn't research that.

The reading I did suggested that certain metals, when wrapped around a cable, would attract RFI from the environment to them more readily that the cable they surrounded. The idea was that it would then "clean" the RFI from the desired cable, PC or otherwise. Proper shielding does this too, but many of our AA inmates use these wraps with properly shielded cables, so maybe typical shields aren't as good as we think. The coefficients of whatever it was varied greatly among metals. Copper, solid or otherwise, was still copper, while nickel was manifold as attractive to RFI (something like 10X, one was even 100X!). Started me believing that there could be something to this "Mu Metal" stuff.

Anyway, the FM coax feed IS shielded cable, and in this case it's quad shielded cable. Why the DIY copper power wraps improved reception there I can't say for sure. But in that case it must have acted like an antenna or antenna amplifier. I remember passive copper coils on old antennas were used to amplify reception years ago. That's my best guess there.

Only thing I can say for sure is that the simple DIY recipe suggested here was NOT effective in my system on PCs.

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Follow Ups Full Thread

Topic - Power Wraps with Wadia 861 - Leisure7 19:51:42 12/17/03 (20)

I had much luck on the 861 - KeithR 13:44:28 12/19/03 (1)

Appears to be a similar approach. - Leisure7 07:34:00 12/21/03 (0)

Re: Power Wraps with Wadia 861 - mazort 18:56:57 12/18/03 (3)

The cheap portable radio test. - Leisure7 10:03:29 12/19/03 (2)

Re: The cheap portable radio test. - S 11:57:54 12/19/03 (1)

Keep the Wadia display OFF. - Leisure7 15:45:17 12/20/03 (0)

Re: Power Wraps with Wadia 861 - gryphonaddict 12:39:37 12/18/03 (0)

Re: Power Wraps with Wadia 861 - highendman 08:32:53 12/18/03 (0)

Re: Power Wraps with Wadia 861 - audionutge@yahoo.com 21:22:09 12/17/03 (1)

Re: Power Wraps with Wadia 861 - Leisure7 09:53:56 12/18/03 (0)

Re: Power Wraps with Wadia 861 - Roland N 20:42:06 12/17/03 (9)

solid core DIY wraps - bartc 13:52:24 12/18/03 (8)

Solid or stranded but needs connection to ground. - Roland N 20:25:49 12/19/03 (1)

That 4.7 MFD cap needs to be film ie polyester is OK. nt - Roland N 20:33:25 12/19/03 (0)

Which effect? - S 06:14:43 12/19/03 (5)

Re: Which effect? - bartc 06:44:56 12/19/03 (4)

You need the proper materials. - Leisure7 09:55:33 12/19/03 (3)

Re: You need the proper materials. - S 11:50:10 12/19/03 (1)

Disagree. - Leisure7 15:53:09 12/20/03 (0)

Yea, verily! nt - bartc 10:35:40 12/19/03 (0)

Follow Ups

Re: Which effect? - bartc 06:44:56 12/19/03 (4)

You need the proper materials. - Leisure7 09:55:33 12/19/03 (3)

Re: You need the proper materials. - S 11:50:10 12/19/03 (1)

Disagree. - Leisure7 15:53:09 12/20/03 (0)

Yea, verily! nt - bartc 10:35:40 12/19/03 (0)

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