Stacking these arrays will need to be a compromise but you should get
somebenifit though not as good as optimum for each band would yield.   



-----
BRETT WINCHESTER
[log in to unmask] 
208-639-8386
###


-----Original Message-----
From: For blind ham radio operators
[mailto:[log in to unmask]] On Behalf Of Bob - KA5ETA
Sent: Monday, May 21, 2007 7:52 PM
To: [log in to unmask]
Subject: Re: Stacked arrays on VHF & UHF

Jerry I don't think that you will be able to faze those dual band
antennas the reason being that UHF beams would take a different spacing
than a VHF one will.  Might be nice to try but I just don't see it
working well.
----- Original Message -----
From: "Jerry Neufeld" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, May 21, 2007 1:21 PM
Subject: Stacked arrays on VHF & UHF


I have 2 CushCraft dual-band, 5-element yaggies for VHF & UHF that I'd
like to use for satellite work. Does anyone have any experience with
stacked arrays of this type? Any ideas where I might obtain accessible
material on how to optimize stacked, dual-band antennas? Any suggestions
on this would be much appreciated.

Also, I have a MFJ antenna analyzer, the 269 to be specific. Although
this analyzer provides for UHF measurements, it does not have a pick-off
for RF which I need for my MCount morse-code frequency reader. Anyone
have any ideas on how I might gain access to the RF output of the
analyzer without significantly influencing readings, especially for UHF?

Thanks to anyone who has advice on these matters.

Jerry  VE3QSO