Why would you mount the second antenna upside down???
Is this to keep the coax to the two antennas close together and gain the
loss through the coax to the upside down antenna??
Is it to ensure early failure of the upside down antenna because of
moisture buildup??
Is it to cause the signal to go toward space rather than back to the ground
due to any possible down tilt built into the antenna??
I would use folded dipole antennas due to their grounded nature. The
colinear antenna tend to have problems with flexing and lightning. When all
but the bottom quarter wave section is disconnected due to flexing or
lightning, there is no way to determine that you have an antenna problem
from the ground.
Just my thoughts. YMMV.
73
Glenn
WB4UIV
Over 30 years in the amateur service.
At 07:32 AM 01/29/06, you wrote:
>On Sat, 28 Jan 2006, Jim Connell, KH6JKG wrote:
> > I have a preference for Station Master antennas. Although, most of our
> > sites are simulacasting on VHF & UHF. So, dual-band antennas where also
> > used over the years.
>
>You may be able to hack around this if you can get permission to install
>another antenna below your current antenna. Then get a diplexer, place it
>up the tower and mount the other band's super stationmaster upside-down
>below the primary one. You'll have to see about water drainage issues, of
>course.
>
> > On the sites with unused parts of these dual-band antennas, should the
> > unused section of the antenna be terminated? With a short or 50 ohm
> > termination?
>
>Seems preferable to do so as some sites have reported interference issues
>from unterminated coax in the building attached to antennas on the tower
>no longer in use.
>
>--
>Kris Kirby, KE4AHR <[EMAIL PROTECTED]>
> "BIG BROTHER IS WATCHING YOU!"
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>
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