[TowerTalk] ALL THE RIGHT ANGLES ?

[w8ji.tom]

Great Tom!

I'm glad you also caught the serious flaw in the method used! Too many
people rely on flawed measurements for critical information! 

> ALL   THE   RIGHT   ANGLES ?
> 
> YES and NO !
> 
> N6BV  used  100 ft elevation for his 80, 40 and 20 meter models,
> and 60 ft elevation for 10 and 15 meters, at both ends of the path.
> 
> Such elevations have pattern NULLS  inside the range of angles
> the ionosphere will support.  Of course his results show NO 
> propagation at those angles because of the ANTENNA PATTERN.
> 
> If one really wants to understand the IONOSPHERE, it is necessary
> to illuminate ALL angles equally, or use several different heights 
> to check path loss at each angle that is supported between the 
> two given locations.

..........and that would require a VERY tall tower even on ten meters!

73 Tom 

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