On Tue, 21 Feb 2006 [EMAIL PROTECTED] wrote:
> I am sure that something could be assembled with low enough output to
> handle the mobile duplexers that are so abundant for VHF; thre ones
> designed for a 5 MHz split. However, I can't see the beauty of a
> portable repeater that is 100% duty cycle at 2 watts output. Even if
> you were able to get the power output to a level as high as 10 to 20
> watts, that portable tower structure is what I would like to hear about.
What if you took two 1/4 wave ground planes, mounted the RX antenna up
top, fed with hardline, and mounted the TX antenna pointing down, 1/2
wavelength (or 4/2 wavelegths) down from the mounting point of the first
antenna? This, it would seem, would put the image of the antenna 180-out
from the first antenna, plus the isolation of having to go through a
common ground surface as it were. That might give you a few DB of
seperation, if there aren't too many near-field or far-field reflections
to have to overcome.
--
Kris Kirby, KE4AHR <[EMAIL PROTECTED]>
"BIG BROTHER IS WATCHING YOU!"
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