[Elecraft] Astron VS-35M Powwer Supply V-

[Walter Underwood]

Cat 5 cable has a different twist on each set of pairs. Those range from 52 to 72 turns per meter or 1.94 to 1.38 cm per turn. That works out to 15 to 22 turns per foot.

https://en.wikipedia.org/wiki/Category_5_cable#Individual_twist_lengths

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Apr 12, 2018, at 9:48 AM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
> On 4/12/2018 4:04 AM, john at kk9a.com wrote:
>> How much power cable twist is needed to be effective for reducing RFI/EMI?
> 
> More is better. :)  I put black and white #10 in a vise on one end and a drill motor on the other and twist it a lot, then let it sit overnight so that it will at least partially learn its new position. :)  I'd have to look, but I'd guess I'm getting 3-5 turns per foot, and it will vary from one end to the other.
> 
> Note that twisting power conductors only helps prevent coupling to and from those conductors.
> 
> 73, Jim K9YC
> 
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