Pat, what are the details of your trap? I'm using an inverted L for 80m,
about 5' away from my tower and have been VERY happy with its
performance. I've often thought of putting a trap in it and extending
the sloping section to get 160 m on it, but have not seen either a
commercial trap or design for a trap that I was happy with. What
resonant freq did you choose for the trap, and how is it constructed?
Thanks, 73
...hasan, N0AN
Pat Rundall wrote:
I am contemplating the construction of a dual band inverted L for 160 and 80
meters. It would be a quarter wave design with a sloping top and mounted off
of the side of my self supporting tower.
I have modeled it in MMANA and am looking for advice on the design,
improvements, matching unit/trap ideas, alternatives, etc.
You can see what the design looks like, SWR/gain plots, design
considerations, etc. here:
http://www.n0hr.com/Dual_band_Inv_L.htm
If you have input, I would certainly love to hear it.
73
Pat N0HR
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