On Wed,11/26/2014 6:26 PM, Jim Lux wrote:
they use a Amidon 73 mix for this particular balun
That's an exception -- a GOOD one, and was W2DU's choice for his choke
balun. #73 puts the resonance in the middle of HF, so it's a good
design. So I'll retract my negative comments about it -- IF it uses one
of Walt's designs with 200 beads. Most so-called W2DU baluns use only
50, and some don't even use #73.
For a discussion of this, see http://k9yc.com/CoaxChokesPPT.pdf
beginning on page 27.
73, Jim K9YC
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