Note1. All choke baluns have 10 turns in spite of the pictures.
Note2. Ferrite toroid used in this measurement is FT-240-43.
Note3. Markers are at 1.8MHz, 3.5MHz, 7MHz and 14 MHz.
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Verdict
As you can see there is only a negligible difference in the common mode impedance between the winding styles.
So you can wind your choke balun as you wish to get at least 1000 ohms common mode impedance.
Update 2022-02-14 OH7SV
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