[TowerTalk] Urban verticals and dipoles
Rob Atkinson, K5UJ
k5uj at hotmail.com
Mon Sep 22 17:17:40 EDT 2003
I operate with a Gap Titan vertical and an open wire center fed flattop.
I'm on a small city lot (100' x 50') with the ususal clutter: aluminum
siding, power lines etc. I put the vertical up on a 15' pipe to get it up a
bit. It's feedpoint is about 15' above its base so it's almost 30' high
(40' total) and does a pretty good job of clearing a lot of the obstructions
which I think is especially important on the higher HF bands.
The flattop is about 30' high so a lot of the RF goes straight up. Even so
it way outperforms the vertical in most of North America on 40 meters. The
vertical shows an edge beyond 2 or 3 thousand miles. Not sure about the
higher bands because the times I get to operate are usually when they aren't
open. I don't even use the vertical anymore on 75 but the Gap Titan was
never known for being a great 75 m. antenna anyway. The horizontal wire
picks up about 5 S units less noise on the low HF bands also.
Rob Atkinson
K5UJ
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