Sunday, December 4, 2016

Simple Ham Radio Antennas--7dB Collinear Antenna. Post #972

7dB Collinear Antenna
Author:  Harry Lythall (SM0VPO).
Accessed on 05 December 2016, 00:50 hrs, UTC.
Please click link or enter the title URL to read the article.

Are you having trouble reaching that distant 2 meter repeater or finding parts of your "geographically challenged" neighborhood living in a VHF "dead zone?" This high-gain VHF Collinear Antenna from Harry Lythall (SM0VPO) will help you eliminate weak signal reports in your shack.

According to Harry, this easily made VHF Collinear Antenna can be assembled with material available at the nearest hardware store or building supply outlet. All you need are some stranded power cable, 3 sections of PVC pipe, four coil forms, a balun, small lengths of 50 ohm coaxial cable, and a length of coax for your feed line.

Harry explains the design and construction process step-by-step, complete with photographs, illustrations, and a full list of materials.  Harry says this homemade VHF collinear antenna produces about +7.5 dBd over his 1/4 wave magmount antenna.  This would make an excellent weekend project.

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Aloha es 73 de Russ (KH6JRM).

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Aloha es 73 de Russ (KH6JRM).