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@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@kk9a.com wrote:
>> The vendor probably believed what
>> he was saying and should be properly informed.
>
>
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