There's a small program named INV_VEE available from website below.

It will tell you immediately all you wish to know about interactions between
wire lengths, height above ground, apex-angle between 0 and 180 degrees,
wire-size, feeder loss, SWR, radiating efficiency, etc., of any inverted-V
at any fequency.

It won't tell you much about its radiation pattern but that's already a
simple, well known property of the popular inverted-V. For practical
purposes, at ordinary apex angles, it is omni-directional and fairly
low-angle as EZNEC is designed to show you.

Download INV_VEE in a few seconds and run immediately. Good DX-ing with it.

Free to USA citizens.
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Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
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