At 2:09 PM -0400 7/18/03, N2TK, Tony wrote:
>Would there be a recommendation to have one design for the high bands
>(40-160M) and one for the high bands (10-30M)? If so, how many turns
>through the core would be recommended for each?
If I had separate feedlines for high and low bands, I would indeed
use differently-designed common-mode chokes. I'd probably use
FT-240-61 toroids in both; and, to determine the numbers of turns to
use in each, I'd measure impedance vs. frequency with different
numbers of turns. I haven't done this yet, and I leave for vacation
early tomorrow morning and haven't begun to pack, so I can't do it
for at least a couple of weeks. I suspect that W1JR already has this
info in hand.
-Chuck, w1HIS
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