Hi Ed,
No, not twisted pair for chokes. But I have recommended parallel
enameled wires and THHN (ordinary house wire) wound on #31 toroids
connected as two-wire transmission line. You're correct that closely
spaced enameled wire yields Zo about 50 ohms; closely spaced THHN yields
Zo in the range of 85 ohms - 100 ohms. Jerry Sevick, W2FMI, noted this
result in late editions of his book, and my measurements confirm that
within measurement accuracy.
73, Jim K9YC
On Thu,12/22/2016 11:22 AM, Edward Mccann wrote:
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.
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