[TowerTalk] Stacking

[Barry Kutner]

Hi Steve:
Isn't a modest stack an oxymoron? :.)
I have a TH7 stack and have never found any degradation when the 
antennas (both rotatable) point in different directions. Take the 
worst case scenario - antennas pointed 180 degrees apart. 
Suppose your F/B is 20 db or so. You have 1 KW going out, and 
the other antenna has 10W out of phase in the same direction, 
providing some cancellation. Not very significant in the real world, 
is it?
At times, I find splitting the signal to be a big advantage - for 
example, early morning on 20 when I point the upper at JA and the 
lower at EU.
73 Barry

On 4 Jul 00, nn4t@bellsouth.net wrote:

> 
> I apologize if this topic has been discussed before, but I don't
> remember it coming up. I have modest stacks of monobanders for 10, 15
> and 20 on separate towers. On each the top antenna rotates while the
> lower is fixed on Europe. When running Europe I always try to align the
> antennas as best I can. My assumption is the better aligned the
> antennas, the better the pattern. My question is, how critical is this
> alignment? Is there a point where some cancellation/degradation of the
> pattern begins to take place? Or would having one antenna at 30 degrees
> and the other at 55 give you broader coverage to the various countries
> of Europe? Thank you. Steve, NN4T.
> 
> 
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--
Barry Kutner, W2UP              Internet: w2up@mindspring.com
Newtown, PA         FRC         alternate: barry@w2up.wells.com

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