[Elecraft] KAT2 with EFHW antenna

[Vic K2VCO]

Just speculating -- I bet a half-wavelength wire in inverted-L configuration fed at the 
base with a parallel-tuned circuit would work well. The high-current part of the vertical 
piece would be at the top, there would be plenty of current in the horizontal part too, 
and very little local ground current.

On 8/24/2011 6:54 AM, William Ravenel wrote:
> Steve Yates, AA5TB, has a very informative web page on EFHW antennas and how to build a
> parallel tuned circuit with a link coupled feed at the radio end to reduce the 1800 to
> 5000 ohm impedance to a 50 ohm non-reactive load. He has examples of both QRP and QRO
> versions of the circuit. I built the QRP version which uses a polyvaricon capacitor
> (available through Hendrix Kits among other sources) to create a very small tuning
> device that will match resonant End Fed half wavelength antennas on 40m, 30m, 20m, and
> 17m. I use it mostly with a 33 foot wire on 20m raised on a 31 foot Jackite fiberglass
> pole and have had fun working DX with 5 watts. It is easy to change bands by exchanging
> the wire with one cut for the band of interest. I do not use a counterpoise and do not
> have any trouble at the rig. Steve explains why this works. For higher power a one
> meter counterpoise helps. I use this antenna with a K1 and K2, both with internal
> antenna tuners. The tuners are not needed, but I leave them activated to easily
> compensate for any small mismatch across the band.
>
> Steve's page is found at http://aa5tb.com/efha.html
>
> William Ravenel, AI4VE ______________________________________________________________

-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/