Fw: Topband: Beverage height experiment results

Tom Rauch w8ji@contesting.com
Wed, 22 Nov 2000 17:58:59 -0500

>  On a related note, is there any good reason why two Beverages couldn't be
>  mounted on the same supports? As they are not resonant antennas, I would
>  think that this should work OK.

Hi Jeff,

Mutual coupling is mutual coupling. It is not affected by resonance.

I think what has misled you is that non-resonant guyline or non-
resonant antennas near other antennas absorb and re-radiate less 
energy. The problem with Beverages is different, the antennas are 
better considered "resonant everywhere" because they are so long 
and terminated. They actually "absorb" (and of course can re-
radiate) signals quite well over an extremely wide bandwidth, that's 
what a lot of us like about them!

You'll need to keep them much further apart than the height they 
are above ground to prevent interaction when they are parallel. 
Probably 50 feet or more would be enough on 160 for a typical 
antenna five feet high, but I'm sorta guessing.

73, Tom W8JI

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