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Old April 18th 05, 04:49 PM
Buck
 
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On Wed, 13 Apr 2005 12:49:29 -0500, Cecil Moore
wrote:


I just ginned up a 5 foot tall antenna with 3.8 dBi gain. That's
half the height and considerably more gain than a 1/4WL whip.
With more time, I could do better.


What is the dBi gain of a 1/4 ground plane?


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Buck
N4PGW
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Old April 18th 05, 07:09 PM
Cecil Moore
 
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Buck wrote:
What is the dBi gain of a 1/4 ground plane?


Rule of thumb: zero dBi
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Old April 18th 05, 08:20 PM
Richard Clark
 
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On Mon, 18 Apr 2005 10:49:31 -0400, Buck wrote:
What is the dBi gain of a 1/4 ground plane?


Hi Buck,

-0.22dBi to +2.2 dBi depending on the proximity of ground and the
level of screening with radials.

73's
Richard Clark, KB7QHC
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Old April 20th 05, 04:52 PM
Buck
 
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On Mon, 18 Apr 2005 11:20:01 -0700, Richard Clark
wrote:


-0.22dBi to +2.2 dBi depending on the proximity of ground and the
level of screening with radials.


I take it that +2.2 is with radials on an elevated ground plane?

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Buck
N4PGW
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Old April 20th 05, 05:44 PM
Richard Clark
 
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On Wed, 20 Apr 2005 10:52:13 -0400, Buck wrote:
I take it that +2.2 is with radials on an elevated ground plane?

Yup, waaaay elevated.


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Old April 20th 05, 06:35 PM
Buck
 
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On Wed, 20 Apr 2005 08:44:42 -0700, Richard Clark
wrote:

On Wed, 20 Apr 2005 10:52:13 -0400, Buck wrote:
I take it that +2.2 is with radials on an elevated ground plane?

Yup, waaaay elevated.



lol

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Buck
N4PGW
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