[Elecraft] K3: reverse 12 volt supply

Walter Underwood wunder at wunderwood.org
Tue Sep 15 16:30:24 EDT 2015


Good point. The original poster was asking for “paired” wire, which could be interpreted as zipcord. Twisted pair is better.

Powerwerx also has separate red/black wire of various sorts, including extra-flexible and welding cable.

http://www.powerwerx.com/wire-cable/ <http://www.powerwerx.com/wire-cable/>

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

> On Sep 15, 2015, at 12:05 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
> On Tue,9/15/2015 11:55 AM, Walter Underwood wrote:
>> Powerwerx has red/black zip cord from 24 gauge to 2 gauge.
> 
> Zip cord is NOT good for ANY application, because it is inherently susceptible to RFI. TWISTED PAIR is FAR better, because it inherently rejects interference from low audio frequencies to at least VHF. In the last few years, I've been replacing more of my DC wiring with twisted pair. I make it by putting black and white stranded THHN in a drill, the other end in a vise, and twisting.
> 
> 73, Jim K9YC
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