[TowerTalk] Stacking antennas Question

[K7LXC at aol.com]

In a message dated 6/29/2009 1:02:25 P.M. Mountain Daylight Time,  
towertalk-request at contesting.com writes:

>  I have an A3S Tribander on my tower and I want to add the  A3WS 12/17 
meter yagi above it. I have 7 ft of available mast above the  A3S.
Is there any problem with mounting the 12/17 m yagi at 7 ft above the  
10/15/20 yagi? The boom length on the 12/17 yagi is 14 ft and I have heard  many 
times that 1/2 boom length is sufficient separation. The antennas are NOT  
harmonically related.
 
    Electrical spacing is one thing. Even more  important is the mechanical 
spacing. What's your local windspeed rating? What  is the mast material? I 
don't think you want it to bend when a big windstorm  comes up.
 
Cheers,
Steve    K7LXC
TOWER TECH 



 
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