Whoops, originally sent from the wrong account so this won't make it
on the Elecraft list the first time.
Michael
Begin forwarded message:
From: Michael Babineau <[EMAIL PROTECTED]>
Date: December 30, 2005 2:01:33 PM EST
To: wayne burdick <[EMAIL PROTECTED]>
Cc: [email protected]
Subject: re;[Elecraft] New Elecraft product: 80/30 meter module for
the KX1 transciever
wayne burdick <[EMAIL PROTECTED]> wrote :
We're pleased to announce that the KX1 is now a 4-band radio!
This is great news. I can hardly wait !
One question I'm sure to get is
whether the KXAT1 ATU is usable on 80 meters. The answer? Yes, but the
KXAT1 wasn't designed to cover this band, so it will only help with
specific end-fed wire antenna lengths to be determined.
I would suggest that someone investigate how well a 26.5 meter (ie
approx 87 ft)
long wire matches with the KXAT1.
This is one of the "magic" lengths suggested as a good compromise for
matching
on most of the amateur bands, by Alan Chester, G3CCB (SK) in his RADCOM
article titled "Taming the End-Fed Wire". This may be your best bet
for a wire
that will easily match on 80m/40m/30m/ and 20m with a tuner, as it
avoids multiples
of half wavelengths (high impedance) on these bands.
I have used this length in the field with my 4 band K1 and KAT1 with
good results.
Unfortunately I don't think I ever tried it with my KX1 (I'll have to
check my notes)
as a shorter 28 foot wire matches well on 40m through 20m and seems to
be fairly efficient.
I use the #24 AWG Teflon coated wire that N2GO sells and I have found
that an 87 foot
length will spool up nicely on to one of those plastic YO-YO sized
camping
clothesline reels that Walmart sells, with some room to spare.
Michael VE3WMB
P.S. Note that this 26.5 m length is very close to the 84 foot length
suggested for a W3EDP,
which was arrived at experimentally by starting with 100 feet of wire
and repeatedly
chopping 4 feet off until the best results were obtained.
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