Posted by
wayne burdick on
Jun 27, 2012; 4:09am
URL: http://elecraft.85.s1.nabble.com/K3-KX3-Operating-Tip-APF-audio-peaking-filter-for-weak-signal-CW-work-tp7558208p7558241.html
Jeff,
The KXAT3 has a very wide tuning range and is specifically designed
for use with random-length antennas. Typically any wire longer than
20' or so can be tuned up on 40-6 meters. A 74-foot antenna will
probably be tunable to reasonable SWR on 160-6.
A random wire antenna can work very well -- comparable to a vertical
or dipole depending on the band, radiation angle, and your ground
system (if the random wire is worked against radials).
I use random wires almost exclusively. The KXAT3 does an excellent job
with them. It will also do other magic tricks like make an 80-meter
dipole work on all bands, or a 20-meter yagi work on 30-6 meters, etc.
Efficiency will vary, but the transmitter will be happy.
73,
Wayne
N6KR
On Jun 26, 2012, at 7:55 PM, Jeff Herr wrote:
> I know folks who have had bad experiences using a "random" wire with
> an ATU.
>
> Although I ordered a buddipole with the kx3 I still am interested in
> getting
> A 74 foot length of wire up in the pine trees (I will have a
> counterpoise)
> while up in the
> Lassen national forest.....we go there a lot.
>
> When I mention this I am met with much skepticism.
>
> Am I way off base? Is this beyond the capabilities of the tuner?
> Is there a descriptive spec for the tuner that describes the range
> of it
> matching capability?
>
> WW6L
>
>
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