The Ultimate Switchable Balun 4:1, 9:1, 16:1, 25:1, 36:1, 49:1 & 64:1

#MNHR

I decided to make the ultimate balun for those who wish to experiment with different types of antennas to find what works best for them.
The maths are:-
(Total turns / Primary turns)^2 = Conversion
Why did I do this particular balun?
Because I could!
Why make it switchable?
Why not?

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