[VHFcontesting] Propagation gurus wanted

[w8iss]

I have encountered this a NUMBER of times on 6m. Always considered
it to be just the side lobes working good until seeing this message.

I encountered this for a number of years first at one Field Day site
then encountered it this year at a different Field Day site plus have
encountered it mostly at night for the past few years during the VHF+
contests out in Ann Arbor.

James W8ISS
=====
On Tue, 2009-09-01 at 16:00 -0400, Eugene Zimmerman wrote:
> During the last week's big tropo opening Bill WA0KBZ in EM48 reported
> hearing strong clear signals from Oklahoma off the back of his beam while
> pointed northeast into the duct. Surprisingly when he turned his antenna to
> work them, the OK signals disappeared. This is a characteristic of
> backscatter but there was no ionospheric layer in play to produce any
> backscatter. Has anyone encountered this type of strong clear signal off the
> back of his antenna during a tropo opening? Does anyone have any idea what
> type of propagation might be in play here?"
>  
> I mention this in case there is a decent tropo opening in the September
> contest [don't we hope!] If so you might not want to turn your antenna if
> you hear someone off the back - the signal just might disappear.
>  
> 73  Gene  W3ZZ
> World Above 50 MHz
> FM19jd  MD
> 50 => 10 GHz
> Grid Pirates Contest Group K8GP
> Member, CQWW Contest Advisory Group
> 
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