[Antennas] Carolina Windom

[Steve H]

Was given one of these a while back, (I think its the jr) and it is 
basically an 80m OCF dipole with about 25 feet of 300 ohm 18 ga window line 
at its feedpoint , terminating with a W2AU 4 to 1 balun. I ran some 50 ohm 
coax on the other side of the balun and someone had said that the balun was 
only 300w rated. Its up in a tree almost 40 feet.
As per a sugguestion, to make the dipole a better radiator I removed the 
balun and spliced in more window line, it turned out to be about 50 feet 20 
ga, which was all I could dig up.

I put the other end of the line into my Dentron MT-3000A tuner which accepts 
a balanced antenna on one of its inputs.
Hard to say for sure but the performance seemed better...at least on the 80m 
band which is what I was operating mostly.

I have a nano-vna analyzer and was able to do a sweep on the 80m band and it 
said the lowest vswr was 3.665mc
at 2.74 to 1 with a little under 4 to 1 on the low side of the band and 
anout an even 4 at the top of the band.

Since this is now I guess an unbalanced OCF, fed with balanced window line, 
I am curious if the feed line is radiating at all
with these changes? The total length of the feed line is about 75 
feet....which is about a quater wave for that band.

With the balun , apparently it intentionally makes the 25 foot window line 
section radiate by design.

--
Steve Hearns [ KA2PTE ]