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Once again, he demonstrates that transformers do not make baluns as he
measures only -3 to -4 dB of CMR of the typical current balun.
And......the function of the balun is not necessarily to transform
impedances. The sole function of a balun or CMC choke is to map a common
mode topology into a differential mode topology - nothing more.....nothing
less. That's all in its name: Bal = balanced (differential mode), un =
unbalanced (common mode). Get it?

Dave - W?LEV