Shu,
If you add the 58.5 foot wire to the 16.5' counterpoise, you have a 75
foot antenna. That is close to a half wavelength on 40 meters. You are
feeding it off-center which will allow it to be used on several bands
(even though one of the antenna wires is on the ground).
As I recall, Bruce Prior (one of the KX2 Field Testers) recommended
those lengths for 40 meters thru 10 meters.
If you feed those 2 wires directly from the KX2 tuner using a BNC to
binding post adapter, you do not have to worry about feedline loss -
there is no feedline!
If you do use a feedline, I suggest ladder line rather than coax because
it will not have as much loss in the feedline due to an impedance mismatch.
The KX2/KX3/K3 ATUs have a very wide matching range and this antenna
will work fine with any of their tuners.
73,
Don W3FPR
On 10/10/2019 12:01 PM, Joseph Shuman via Elecraft wrote:
I have had my KX2 with the ATU for about 10 months and operate on 40m QRP SSB
from various locations. Experimenting with different antennas I have
experienced best results with a 58.5’ wire tossed about 25’ up a tree with a
16.5’ counterpoise. I ran the same length wire from my house to the workshop,
grounded the shield side of the cable, and have seen similar results to the
field setup.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
