Cec, do you own shares in Fairite or Amidon? ;o)

All the enquirer needs to do is buy an HF-grade ferrite ring, about 1.5" or
2" in diameter at a car-boot sale, and wind on about 8 distributed turns of
18 or 20 gauge twin, clear-plastic, stranded, speaker wire.

Insert this choke balun at the junction of the coax and the balanced
feedline. If it is outdoors dunk it in some water-repelling goo.

For multi-band working make the coax as short as possible and make the
balanced feedline long enough for the whole to extend from the antenna to
the tuner, with perhaps a little extra.
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Reg.