In article ,
Jet_Li wrote:

best is any vertical from Force 12 - I got one on 75 meters that beats
everything else I have put up.
got one on 40 meters from Force 12 - beats everything else I have put up.

I went to the Force 12 website and clicked on the "Flagpole antennas"
link http://force12inc.com/F12-flagpole-ants-003.htm.

I read the "New 40 Meter Coil" portion of the page with interest --
sounded too good to be true. A moment's use of the calculator showed
that the VSWR figures and the quoted feed point impedances were very
inconsistent -- orders of magnitude wrong. The claimed SWR of 16 for the
unloaded antenna worked out really to be about 850 -- close enough to
infinity for me!

If that's what the "useful A.R.R.L. TLW software" actually indicates,
then the League should withdraw the software. But somehow I suspect that
the software (which I do not have) doesn't predict what the web page
says it does.

I leave it to someone with a copy of EZNEC to see if an 1/8 wave monople
on 40 metres made out of 2 inch diameter tubing really has an input
impedance of about 5 - j460. That part, at least, sounds reasonable to me

David, ex-W8EZE, who hasn't forgotten the formulas for SWR

--
David Ryeburn

To send e-mail, use "ca" instead of "caz".