Telamon wrote:
Fig. 4 is your model. You will get 50 ohms impedance per turn at 10 MHz,
75 ohms at 20 MHz and 100 ohms at 30 MHz. Regressing the chart I
estimate 20 ohms at 5 MHz.

Two problems is BALUN/UNUN are a little more picky about the core and
these are two pieces. Better to have one piece core. Depending on the
type of impedance transformer you want to make this could be an OK value
of inductance for the frequencies you want it to operate on for a
voltage type but you would want more for a current type.


BIG THANKS !!!

This the kind of info I was looking for....

Charly