On 04 Jul 2004 23:30:08 GMT, (Chris Howard)
wrote:


I just purchased a dualband vhf/uhf radio
but I don't have any dualband antennas.

I would like to know if there are any
on-line plans for dual band antennas
that I can build _without_ benefit
of a antenna analyzer or 70cm swr
bridge. This would be for mounting
at home, not mobile or portable.
And I prefer something omnidirectional.

I have some aluminum stock lying around.
Any ideas?

My homebrew 2-meter j-pole (made from 450-ohm ladderline) is also
resonant on its 3rd harmonic, 70cm, and has reasonably low swr on both
bands.

Just do a net search for 2-meter j-poles. Easy to make. And you'll
have a dual bander.

Bob
k5qwg

Bob Miller wrote:
My homebrew 2-meter j-pole (made from 450-ohm ladderline) is also
resonant on its 3rd harmonic, 70cm, and has reasonably low swr on both
bands.

Third harmonic UHF verticals are not a good idea. The take-off-angle
is about 47 degrees so most of the RF is lost. Yes, they work after
a fashion, but not nearly as well as a 1/4WL vertical.
--
73, Cecil http://www.qsl.net/w5dxp



-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----