Building a 9:1 UNUN With FT-140-43 Toroid.

Building a 9:1 UNUN for a random-wire multi-band end-fed antenna using an FT-140-43 toroid instead of the usual T106-2. Presumably the ferrite toroid works better for the lower bands, 40 and 80m, and as well for the upper bands, I would guess up to 10m, not sure about 6m. It remains to be tested in an upcoming video. I should have measured SWR with a 470-Ohm resistor between ground and antenna wire but I forgot. A random wire by the way is any wire which is not a half-wave of any band to be used. The 9:1 UNUN usually requires a tuner.
End-fed antennas: https://youtu.be/0zF7bDoqkG4
EARCHI UNUN: http://www.earchi.org/92011endfedfiles/Endfed6_40.pdf
The field test link will be here as soon as completed.
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