Here’s the antenna deployed on a 5m mast. There’s a 1/4wave length of 75Ohm coax to match the nominal 200Ohm antenna to 50Ohm. KX2 said 1.2:1 at 28.0633 and 28.784. 1.0:1 at 28.3590.
Three guys support the mast and there are 2 more at the corners of the base to hold the antenna in shape.
Construction info and dimensions here:
So I finally got round to doing the maths and making a loop for 10m. A bit of Pythagoras and a bit of trig and I had some lengths. I used 1005/F(mhz) to get the length of the loop in feet. Then multiply by 12 and 2.54 to get it into sensible units. This version has an apex at the top and is fed part way up one side. Full dimensions to follow.
It needs a 1/4 wave transformer made from 75ohm coax to get the match to 50ohms. I had some 3m lengths of quality satellite coax with N and F connectors s…
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