[Elecraft] Portable 60-80m wire antennas

[Brian Hunt]

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?
>
>