I have the PW-1 which is the big brother to the MP-1. I use a tuner with it
because by moving the coil I found this to be a very coarse adjustment. I
did not want to spend all my time trying for the final tweak that was going
to nail the SWR I was looking for. It will get you in the ball park but a
tuner of some sort is best for those fine adjustments IMHO.
I just use an analyzer for roughing it in and the tuner allows me to move
around within the band. I have written more details in the following.
See
http://www.aa8vs.org/aa8vs/pw.htm73 Chuck AA8VS
-----Original Message-----
From:
[hidden email]
[mailto:
[hidden email]] On Behalf Of Howard W. Ashcraft
Sent: Tuesday, July 13, 2004 7:13 PM
To:
[hidden email]
Subject: [Elecraft] MP-1 Antenna KX-1
I have recently tried an MP-1 antenna with my KX-1. I used the small tripod
mount and adjusted the antenna per the diagrams. However, this led to a SWR
of 5.9. By moving the coil, I was able to lower the SWR to 2.0--but no
lower. And it was exceptionally sensitive to adjustment. Moving the coil
by a single turn of wire would jump the SWR to 2.0. In comparison, the KX-1
tunes on my Steppir IR vertical to no worse than 1.2 (with the autotuner
engaged), tunes reasonably well on a 40 meter dipole, and tunes well with
the random wire recommended by Elecraft. Is my experience with the MP-1
similar to others?
Howard Ashcraft
W1WF
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