Hi Dave,
Looking at your data, I see that it differs from my plot of 12 turns of #14 twisted pair on the same type of core (see attached plot). I would like to detemine why, so a couple of questions...
1. Does your data represent |Z|, or is it the resistance of the CMC impedance? (Note that I'm plotting the resistance, because, to me, this is the more important parameter of a CMC).
2. How did you wind your CMC? (I used what I call a "crossover" technique that was described in Ham Radio Magazine: "Simple and Efficient Broadband Balun", by Joe Reisert, W1JR, in the September, 1978 issue). See the attached drawing...
Thanks!
- Jeff, k6jca
