Many hams will recommend you try a home-made balun, multiple turns of coax
cable wound neatly around a cylindrical form. Exact requirements and
effectiveness may vary with frequency and the antenna as installed. You
might want to look at http://www.qsl.net/ta1dx/amator/broadband_baluns.htm.
(It bothered me to see the letter W used for "ohms" in two places. I didn't
spot any other errors/typos but ...)



Also: http://www.hamuniverse.com/balun.html (many pictures)
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Nice URL with excellent info
tnx

Frank GM0CSZ / KN6WH