[Elecraft] Coax-Fed Antenna for KX1 with ATU

[Phil Wheeler]

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 :-)

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

No urgency, so it is a fun mental excercise