dual band antenna

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medicnurse
Posts: 38
Joined: Wed Oct 20, 2004 8:45 pm
What radios do you own?: XTL5000;XTL2500,XTS5000,

dual band antenna

Post by medicnurse »

need to know if it is possible to run a duad band uhf/ vhf on a single uhf 1/4 wave antenna with a diplexer.
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k2hz
Posts: 532
Joined: Tue Mar 01, 2005 7:27 am

Post by k2hz »

It would work fairly well with a VHF 1/4 wave since that would be 3/4 wave on UHF. A UHF 1/4 wave is too short to work effectively on VHF.
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Tom in D.C.
Posts: 3859
Joined: Tue Sep 04, 2001 4:00 pm
What radios do you own?: Progreso soup can with CRT

Dualband antenna...

Post by Tom in D.C. »

There are single, dualband antennas available that are the same size almost as a 1/4 wave VHF antenna. These are made by Comet, Diamond, and I run one that came from Antenna World in Florida and has an NMO mount. There's no need to compromise and risk an impedance mismatch on UHF by running a plain 19-inch whip because the dualband antennas can get pretty inexpensive.
Tom in D.C.
In 1920, the U.S. Post Office Department ruled
that children may not be sent by parcel post.
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Sam
Batboard $upporter
Posts: 60
Joined: Mon Dec 22, 2003 8:41 am

Post by Sam »

I've been very happy with both the Maxrad MAX150/450 and also the Comtelco A1131, which has been mentioned on this board quite a bit. Both are VHF/UHF dual-band, and both are the same height as a 1/4 wave VHF with a little coil in the center.

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http://www.maxrad.com/cgi/maxrad_produc ... alog=10003
http://www.comtelcoantennas.com/PDF%20D ... /A1131.pdf
Sam
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