Topband: Antipodes Paths on Topband in focus

[Herb Schoenbohm]

W0DX (VP2VI). Bob Dennison once tried to explain to me the phenomenon of 
antipodes top band dxing  by suggesting that the beam widths of the TX 
signals may converge like the lenses on a telescope especially along a 
gray line antipodes path to actually enhance the level of the signal 
significantly. When everything is focused properly it makes a 
significant enhancement of very normally weak and most likely unreadable 
signals on top band. This suggests that if the wide beam width of the 
signal is transmitted equally over several paths (multiple paths and 
even skewed paths at the same instance) there could be convergence and 
thus enhancement could occur presuming the paths can be additive or 
provide signal diversity.  However, could there not also be phase 
cancellation under certain conditions and a complete absence of signal 
or negative impact on the signal? 

Just a thought. 


73,

Herb Schoenbohm, KV4FZ


John Kaufmann wrote:

>>Being near the antipode may be one of the few cases where
>>being farther away from a DX station may actually be better
>>for propagation on Topband!
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>>
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>Of course, short path and long path converge on being the same thing when the path is between antipodal
>points.
>
>73, John W1FV
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