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Windom antenna. How to design the choke. N1AUP on 14/2/19
In the 23rd edition of the ARRL Antenna Book on page 10-7, there is a reference to the "Carolina Windom", which sounds like what you built. For their 80m antenna, they used a 22-foot section of coax below the feed point balun and inserted a 1:1 choke at that point. The feedpoint balun was a 4:1 voltage balun which, per the Antenna Book, does not act like a current choke. So, the 22-foot section of RG8X between the 4:1 voltage balun at the feed point and the 1:1 choke 22 feet down, radiates and fills in nulls. I have an old Carolina Windom (10m-40m) that I resurrected in Februaru 2018 after my 10+ years QRT. It is my only "store bought" antenna and it works fairly well. I use it with a tuner in the shack on all bands, 10m through 40m. I've worked a lot of states and DX with that antenna on CW. I would think the 1:1 choke down on feed line would be a good idea.

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