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Author Topic: dipole vs tribander  (Read 2272 times)
VK4TJF
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Posts: 93




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« on: December 27, 2011, 08:06:12 PM »

ok some one out there please give me the low down dirty stats on which antenna would be better an inverted v up like 9 meters high cut for the 20 meter band
or a tribander up like 7.5 meters both over real crappy ground like suburbia. please looking for some eznec geniuses out there. i wanna operate on the 20 meter band but which is a better one?
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K8AC
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Posts: 1465




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« Reply #1 on: December 28, 2011, 05:59:03 AM »

I don't believe there's any need for eznec to answer this.  The inverted vee will be pretty much omni-directional, where even a 2 element tribander would show noticeable gain in the favored direction.  I'm assuming that you're interested in DX, and you will hear a layer of signals on the tribander that you wouldn't be able to copy using just the inverted vee.  At the height you're talking about, a hexbeam design is a reasonable option and looks much less imposing in a suburban environment.

73, Floyd - K8AC
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WX7G
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Posts: 5920




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« Reply #2 on: December 28, 2011, 06:06:08 AM »

Going from 7.5 meters to 9 meters increases the gain at a take-off-angle of 5 degrees (DX angle) by 1.6 dB. If we assign 6 dBD of gain to the tribander at 7.5 meters it has 4.4 dB of gain over a dipole at 9 meters.
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