End Fed Half wave in Half Square config....

 

The End Fed Half wave in Half Square config?

 

That's a mouthfull!

Essentially, I'd planned on doing an inverted L, It turns out that I would need a much more substantial guy wire system to make the fiberglass poles stable in the config I'd planned on using.

 

That problem was the first thing I noticed when I pulled the instruction manual out of the box containing the 46ft of fiberglass pole.

(Rats, here we go again.)

 

Then I remembered a vid that Peter Waters put up about a year ago.

 

Consider the drawing, below, courtesy of Peter himself.

 

 

 

What we have here is two vertical 1/4 wave antennas held in phase because there are two quarter waves of wire in the top section that feed from one side to the other. This results in about 3db worth of gain over a single quarter wave with appropriate ground plane. That gain comes off broadside to the antenna. In other words, you're standing right in the middle of one of two strong lobes as you look at the drawing. In my config, that means SW/NE.

 

That alone makes this thing attractive to my situation, given I can't go "up" as high as I'd like. I'm less than happy with only about 18ft worth of height. (understand.... the antenna ends are raised about the ground by a foot or so). I am thinking that the poles should eb reasonably good at the much lower height and wind load. At this height, the thing models to a radiation departure angle of about 18 or 19 degrees, in my modeling. Not the 5 degrees Callum likes, but not too bad.

 

One trouble is, it only works on 20m, if you're planning on running current fed, to get your usual 50ohm loading.

 

But there's one more bit of magic I'd not considered until going over Peter's vid again:...

Note the voltage feed point, on the one end, left side. Attaching there will give you about 2250 ohms, which of course is perfect for my 49:1 Un-Un.... and what you have here, effectively, is a half wave end fed for 40m, which will work on 40,20,15 and 10m and likely be close enough for the tuner to get me on about everything else.

 

Glad I got the VersaTuner at the Roc City Fest!!

 

So, this will be the way I go for the time being.

Comments as always invited.