[TowerTalk] Stacking Antennas

[Cqtestk4xs at aol.com]

In a message dated 3/26/2009 5:39:51 PM Greenwich Standard Time,  
nq4u at mtars.org writes:

Plans  are to add a stack match. 

Both antennas will be fed with 75 ohm  hardline cut to proper length. Wire
antennas will also be located on this  tower.  

Will there be some pattern distortion due to different  antenna spec's? 

What are some problems that others have had in  stacking two different
antennas such as these?
 
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Anecdotal here:  
 
>From what I've heard stacking dissimilar Yagis has been met with mixed  
success.  I'm not sure of the reasons.  Boom length and phasing  problems come to 
mind.
 
I've been stacking IDENTICAL antennas since the 80's and have always been  
successful.
 
Bill KH7XS/K4XS
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