[Elecraft] Coax-Fed Antenna for KX1 with ATU

[George, W5YR]

----- Original Message ----- 
From: "Phil Wheeler" <w7ox@socal.rr.com>
To: "Ron D'Eau Claire" <rondec@easystreet.com>
Cc: "'Elecraft Reflector'" <Elecraft@mailman.qth.net>
Sent: Sunday, December 21, 2003 3:23 PM
Subject: Re: [Elecraft] Coax-Fed Antenna for KX1 with ATU


>
>
> Ron D'Eau Claire wrote:
>
> >Hi, Phil!
> >
> >Have you considered a simple set of three paralleled half-wave dipoles
hung
> >on the same 50 ohm coaxial feed line?
> >
> >They are tough to get a really low SWR with, but just cutting the dipoles
to
> >"formula length" usually produces something less than an SWR of 3 or 4:1,
so
> >the coax losses aren't high and the impedance should be in easy range for
> >the KX1 ATU.
> >
>
> Yes I have.  My experience with parallel dipoles has not been real good,
> though.  Plus I'm not sure what range the KX1 ATU will cope with nor if
> it the same on all bands.  I'd like to avoid erecting an antenna for KX1
> use which it cannot tune :-)

***Attend my presentation at the Joplin Four States QRP Club QRP conference
next April and learn how to avoid that . . .
>
> But, since I am at the idea phase, all input are good for mulling over.
> I'm looking through the two good UK HF antenna books (Moxon - g6xn -- 
> and David -- g4lqi) this afternoon as well as various catalogs.  I also
> have an unused Superantennas PW-1 (replaced by an MP-1) which I am
> looking into using (problem is requirement for manual adjustment of coil).
>
> I'm even nooding on where I can put a big vertical midway between the
> shack and the living room and use it from either location.  That would
> add a vertical for my primary op location (current antennnas are TH3Mk4
> for 20/15/10, D4 rotating dipole for 40/20/15/10, 30 m dipole and
> full-length G5RV for all else -- so adding a vertical would not be such
> a bad thing).
>
> My indoor designs load well.  But I have an older house with lath and
> plaster walls: Lots of metal in walls!
>
> 73, Phil