[NLRS] Yagi Tilt (was: Re: Remote Coax Switch..)

[Dr. Gerald N. Johnson]

On Fri, 2006-10-13 at 09:10 -0700, Duane - N9DG wrote:
> 
> 
> The fundamental flaw to the tilting the yagi one way (right
> or left) is that if everyone else is also doing that then
> everyone will be cross polarized whenever they point at each
> other if they have all tilted in the same direction. At a
> minimum the polarization will be wrong half the time assuming
> that everyone is tilted either left or right randomly (insert
> political joke here - if you dare).
> 
> So shhh, just don't tell anyone that you've tilted your beam
> ;).....
> 
> Duane
> N9DG
> EN53bj
> 
> --- "John (JK) Kalenowsky, K9JK" <hamk9jk at ameritech.net>
> wrote:
> 
> > Or try 30 degrees for the yagi tilt...6dB down on one, 1.25
> > dB down on the 
> > other.
> > 
> > You have to consider the beamWIDTH, though...a shorter yagi
> > mounted IN the 
> > 'desired' polarization plane, with 3 (or 6) dB less gain
> > will have a broader 
> > pattern than what you get from a tilted 'higher gain' yagi.
> > 
> > 73, JK
> 
Cross polarization isn't so much of a problem if you only tilt the prime
beam ten or 20 degrees. That gives the other polarization second shrift,
but if the primary is horizontal local FM work needs only a little power
at a decent elevation to way more than compete with the handy on a
rubber duck in a basement.
-- 
73, Jerry, K0CQ,
All content copyright Dr. Gerald N. Johnson, electrical engineer