[TowerTalk] Double Coax Runs to Reduce Loss

[Edward Mccann]

Hello Jim:

And Merry Christmas to you the the Santa Cruz Forest.

Re twisted pair, I seem to remember you suggesting at one time that using twisted pair enameled wire on FT-240 #31 mix provided about 50 ohms on the CMC Choke. I just took your cookbook down to Kinko's for a new spiral binding (used that frequently!!) so I don't have it handy, but I seemed to recall you suggesting twisting #14 and wrapping nine turns or so.

Did I get that right, or is old age setting in up here in Sausalito?

Have a great year end.

Ed McCann
AG6CX

Sent from my iPhone

> On Dec 22, 2016, at 9:50 AM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
> Also beware of vendors selling that shiny red/black zip cord -- the copper is often several gauges smaller than it's advertised, with thicker than usual insulation. And zip cord is a terrible choice for power and loudspeaker wiring, because it's a sitting duck for RFI.
> 
> FAR better to use twisted pair, which is much harder to buy but easy to roll your own. Simply buy lengths (or spools) of black and white stranded THHN, stick one end of both conductors in a hand drill, the other end in a vise, and run the drill slowly for a while. Let the twisted conductors sit overnight in the drill and vise. They will try to untwist, but letting them sit minimizes that. The twist will not be perfectly uniform, but it will be plenty good enough.
> 
> 73,Jim K9YC
> 
>> On Thu,12/22/2016 6:15 AM, john at kk9a.com wrote:
>> The vendor probably believed what
>> he was saying and should be properly informed.
> 
> 
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