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Old October 26th 04, 02:36 AM
KD4PQF
 
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Default Beam antenna for satilite question

Question on a beam antenna can i put a extra reflector 90 deg or on
the botom of the director so the signal will also be reflected more
upwared sence i dont have a tracking roater will this help on high
altatude passes?
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Old October 26th 04, 05:34 AM
Hal Rosser
 
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"KD4PQF" wrote in message
om...
Question on a beam antenna can i put a extra reflector 90 deg or on
the botom of the director so the signal will also be reflected more
upwared sence i dont have a tracking roater will this help on high
altatude passes?


you might want to just use a 1/4-wave vertical or a dipole
beams are good if you aim them where you want to hear
but if they're not aimed they are worse than a rubber-duck.
the gain in the forward direction is at the expense of other directions.




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Old October 26th 04, 10:59 PM
Ralph Mowery
 
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"KD4PQF" wrote in message
om...
Question on a beam antenna can i put a extra reflector 90 deg or on
the botom of the director so the signal will also be reflected more
upwared sence i dont have a tracking roater will this help on high
altatude passes?


you might want to just use a 1/4-wave vertical or a dipole
beams are good if you aim them where you want to hear
but if they're not aimed they are worse than a rubber-duck.
the gain in the forward direction is at the expense of other directions.


YOu don't usually use 1/4 verticals for over head passes of the sats. They
have a big null overhead. Use a horizontal dipole or beter a dipole over a
reflector. Think about 3/8 wavelength is the best distance for the dipole
over the reflector but need to check that .


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Old October 27th 04, 01:38 AM
Hal Rosser
 
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you might want to just use a 1/4-wave vertical or a dipole
beams are good if you aim them where you want to hear
but if they're not aimed they are worse than a rubber-duck.
the gain in the forward direction is at the expense of other directions.


YOu don't usually use 1/4 verticals for over head passes of the sats.

They
have a big null overhead. Use a horizontal dipole or beter a dipole over

a
reflector. Think about 3/8 wavelength is the best distance for the dipole
over the reflector but need to check that .

I'll buy that - point is though - beam's a no


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