Scott, I have been using a 30 meter HS for some time now, and according to
my dimensions and EZNEC, I get 65'6" for the horizontal wire and 37'7" for
the vertical 'tails'. However, what you are figuring may be close enough.
The horizontal wire length wire will cause the 'tails' to be longer or
shorter depending on what you make it. I've discovered that a SHORTER
horizontal wire (not by too much) and longer tails seems to give a tad more
gain, but not enough to notice. I did it so I could squeeze it in between 2
trees 46 feet apart (30 meters for mine, remember). Also, the coax can be
connected to either the coax center conductor to the short vertical section
or the longer section, it really doesn't matter. The longer section is one
long, continuous section of wire, roughly 3 1/4 wavelengths long with the
last 1/4 bent back towards ground to make the other vertical. The 1/2 wave
section of horizontal wire is a phasing line for what an HS is: top load
phased verticals. Corner load is what I do but find a way to keep the coax
away from the vertical wire. Mine comes off at an angle to another nearby
tree. It's easy to get interaction between the coax and the antenna and you
need to avoid that. Also, I'd suggest a coax choke at the feedpoint. I get a
1.1:1 match at 10.1.


"Scott Gordon" wrote in message
...
Any one have any detailed plans on 40 Meter Half Square antenna? I
calculated 33.33 feet on verticals and 68.33 on horizontal. I was
thinking of feeding it at the corner, I think it will be close to 50 ohms.
Now center should go to the vertical and shield to horizontal....Another
question is the far end vertical is it connected or seperated from the
horizontal connection?

--
Scott Gordon
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