[TowerTalk] Stacking offset compensation

[sawyered at earthlink.net]

I actually did model this a number of years ago.  From memory:

 

What matters is the DE line up.  1 to 2 ft was not material.  A few tenths
of a db.  However it started dropping off pretty quickly to as much as half
the stacking gain for a 5 - 6 ft offset on 10M.

 

While its not perfect, you can compensate for the material part of the
offset by shortening or lengthening one of the feed lines by the difference
(figuring VF into the equation).  I would only bother if more than 2 ft on
10M or 3 ft on 15 or 20M.

 

Theoretical stacking gain is 2 - 2.75dB.  So knocking 1 db off of that
(which is not hard to do) is a pretty big hit to the possibilities.

 

Ed  N1UR