[TowerTalk] Fw: stacking yagis - benefits?

Al Williams alwilliams@olywa.net
Thu, 30 Mar 2000 08:08:11 -0800

-----Original Message-----
From: Al Williams <alwilliams@olywa.net>
To: towertalk@contesting.com <towertalk@contesting.com>
Date: Thursday, March 30, 2000 8:04 AM
Subject: stacking yagis - benefits?

>Never having operated stacked yagis, I have no experience to answer the
>following questions concerning operating when multiple yagis are connected
>in parallel.
>1.  If a yagi at 40' and a yagi at 70' are simultaneously driven, is the
>power being fed to each yagi reduced by one half?  Then the radiation at
>major elevation angle is also reduced by one half?
>2.   Radiation at the 40' and 70' elevation angles, when simultaneously fed
>will be less at each of those
>angles than if only one yagi is fed?  This is because the radiation from
>other elevation angle is not enough to make up for the one half power lost
>at the other radiation angle?
>3.  Radiation at angles between  the 3 db down angle  of the 40' &  and the
>3db down angle of the 70' elevation angles will be increased up to a
>of 3db? if both yagis are fed over that of either
>yagi if only one is fed?

FAQ on WWW:               http://www.contesting.com/towertalkfaq.html
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm