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[TowerTalk] hf vertical

To: towertalk@contesting.com
Subject: [TowerTalk] hf vertical
From: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>
Date: Thu, 24 Nov 2005 19:36:46 +0000
List-post: <mailto:towertalk@contesting.com>
I have a gap titan. I think it is an okay vertical on 40, 20, 17 and maybe 15. I can make contacts on 80 with it but have not made enough to say that band is okay because i use another antenna for 80. however because of its physical size i have doubts. any all-band antenna will have compromises. for good performance all across HF you really have to have at least two antennas--one optimized for 80 (i.e. BIG) and one for the higher bands (I'm talking about verticals). I should say before i forget that i have a ground screen under my titan which is elevated about 15 feet and that may have improved my experience. anyway I found the titan kind of a pain to put together and get working okay. i had to fool around with standing the feed off from the mast, to keep from coupling to it and detuning, i had to use a line isolator in the feed near the antenna, and i had to mess around with the "tuning rods" i.e. linear loading rods using a swr analyzer to get it right. It has wound up being okay but if i had it to do over NOW, I'd get one of those steppIR 40 - 6 m. verticals that adjusts for 1:1 vswr on any freq above 7 mhz. that is a 1/4 w. ant. and with ur tower, i'd put it up there with a cone of various length radials, at least 5 or 6 for each band and alternating with each other coming down 45 deg. out from the tower and equally spaced all around it.

rob / k5uj

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