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Old June 16th 08, 03:40 PM posted to rec.radio.amateur.antenna
Robert Smits Robert Smits is offline
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First recorded activity by RadioBanter: Aug 2007
Posts: 20
Default Triband Mobile Vertical

Gary Smith wrote:

Hi all, i am installing a mobile radio into my car soon. I need an antenna
that will cover 2 metres, 70cm and uhfcb as the rig only has one antenna
socket. I would appreciate any information on how to make one antenna to
suite these 3 bands or maybe there is one available. I would prefer to
build one. Yes, i know I'm not supposed to be using a ham radio on UHFCB
so don't bother mentioning it.

Thanks.

Gary
VK3LCD


Two options come to mind, Gary. The first is to find a commercial diplexer
that covers your frequency ranges, which is not likely, second is to build
a three port diplexer. Google for diplexer, and you find a fair number of
designs, many of which could be modified quite easily, I think.

Third, a 1/4 wave antenna at VHF is a 3/4 wave antenna at UHF. Can you make
one broadbanded enough to cover? Don't know, but it might be worth trying.

--
Bob Smits, VE7HS, Ladysmith, BC

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