Hi Bruce,
Have you thought about using a 9:1 unun and about 100 ft of wire with a
short counterpoise? The unun -may- get the feed point Z down into the
range where the KX1 tuner can match it. I picked 100 ft because it's
not a quarter wave or half wave on either 80 or 60 plus and it's more
than a quarter wave on 80. You could go to 50 ft but it would be less
efficient on 80 meters.
An alternative to the unun would be to use a matching network consisting
of a link coupled tuned tank circuit. Tap the resonant coil to get both
80 and 60 and tap the link every turn for 6 - 8 turns to get close to 50
ohms. Wind the coils on a small (~1.5 inch) powered iron toroid and use
a small BC band variable cap. For under 20 watts the components would
be light weight and fit in a small plastic box.
Have fun!
Brian, K0DTJ
On 3/15/2016 09:59, Bruce Nourish wrote:
For 80m, the KX1 docs recommend a resonant antenna, and I'm considering my
options. Most of what's written out there about low band antennas seems to
be about durable (and heavy) mobile or home installations. Does anyone have
any experience they'd like to share with backpackable lower band antennas?
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