[CQ-Contest] 10 meters Propagation in June

David Robbins K1TTT k1ttt at arrl.net
Fri Jun 13 15:48:43 EDT 2008

That occurs in the winter also, but earlier in the morning as the sun
crosses the south atlantic... beaming south to south-east from new england
you can pull out weak Europeans that know to beam south-west.  In the summer
the ionization is father north and the days are longer so it can last later
in the day.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net

> -----Original Message-----
> From: cq-contest-bounces at contesting.com [mailto:cq-contest-
> bounces at contesting.com] On Behalf Of John Warren
> Sent: Friday, June 13, 2008 17:05
> To: Contest
> Subject: Re: [CQ-Contest] 10 meters Propagation in June
> There's another interesting 10M propagation mode which happens most
> summers, and doesn't seem to depend much on the state of the sunspot
> cycle. That's "side-scatter" between N America and Europe.
> I'm not a physicist or propagation guru, but I'm told it occurs
> because the sun moves through a vertical position over the mid-
> Atlantic Ocean, and causes extreme ionization there. Signals between
> Europe and N America can be bounced off that intense ionization at
> more or less  a right angle. Not strong, but good readable R5 S3
> signals, typically around 2030-2230Z. Both sides of the QSO should be
> beaming to eastern South America - any Europeans on the band probably
> will be, and North Americans with Yagis can usually get their attention.
> I know I've worked several Italians who understand that mode (for
> example Lauro IK4GRO), and I seem to recall working other Europeans
> too.  Just make sure they don't turn their beams to North America -
> they'll vanish, hi!
> Anyone have more experience with this?
> 73,  John,  NT5C.
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