For several years I've been using a 33 ft wire and a pair of small
tapped loading coils to get an EFHW vertical resonant on 20m. 30m and
40m. It's fed with a link coupled tuned tank circuit consisting of a
coil on a 1 inch powdered iron toroid and an air variable capacitor.
The link consists of 1-6 switch selected turns which gives a wide range
of impedance transformation. Antenna is supported with a 33 ft MFJ
fiberglass mast. Easy to set up and tune. I do have to haul the wire
down to change the taps and retune for a band change. Used with a K1 or
KX2, the internal ATU is usually in bypass.
73,
Brian, K0DTJ
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