[Boatanchors] OT: Something I don't understand about 10M propagation

[manualman at juno.com]

While Sporadic E may be considered random, from late Spring through late
Summer Sporadic E can be fairly consistent daily around the U.S. Right
now as I type, southern and central CA are open to Southeastern U.S. and
the Caribbean.
This web site tracks Tropo conditions. Select region to view your area.
http://www.dxinfocentre.com/tropo_wam.html
While tropo is generally a 40 MHz and above condition, it's not unusual
for it to appear on 10 meters. Mix in a little Sporadic E, and you can
have a great opening to somewhere.

Pete, wa2cwa

On Wed, 5 Jul 2017 17:21:13 +0000 Phil <ko6bb1 at gmail.com> writes:
> Thank you Pete,
> 
> I'd heard about Sporadic E, but always thought it as a random thing 
> 
> (which apparently it is).  Never considered Tropo though. My career 
> 
> field in the AF was Microwave Radio Relay which also included Tropo 
> 
> Scatter, TXing very high power (1KW to 50kw, I worked on it all) 
> through 
> large dishes in the hopes that some would 'scatter' and be heard at 
> the 
> distant receiver.  That was usually in the 900MHz to 1GHz range and 
> I 
> never thought about it possibly having an effect at 28MHz.
> 
> But since it is quite consistent each night and morning (with some 
> exceptions) I suspect that it is 'tropo', either scatter or ducting. 
> . .
> 
> 73 From "The Beaconeer's Lair"
> Specializing in DXing NDBs (Longwave Beacons)
> Phil, KO6BB,  http://www.qsl.net/ko6bb/
> KO6BB/B beacon, ~20W on 28.290 MHz, Ringo Vertical
> 
> On 7/5/2017 6:36 AM, manualman at juno.com wrote:
> > Most likely it's Sporadic E which can happen any time night and 
> day. At
> > 2:30 AM EDT, right now, there's activity up and down the west 
> coast. Also
> > have to consider tropo conditions up and down the west coast. 
> Again,
> > right now, "very intense to strong" from Southern CA to Northern
> > Washington.
> >
> > Pete, wa2cwa
> >
> > On Wed, 5 Jul 2017 06:24:00 +0000 Phil <ko6bb1 at gmail.com> writes:
> >> Hi All,
> >>
> >> First, let me say that I've been "radioactive" in one form or
> >> another
> >> since the early 1950's.  Have a LOT of radio-time under my belt.
> >>
> >> OK, we're basically at the sunspot low and I realize that 10M 
> prop,
> >> for
> >> the most part is rather poor.  Earlier in the cycle it was very
> >> routine
> >> for me to see spots of my beacon from coast to coast, Australia,
> >> DAILY
> >> to Hawaii, etc.  I don't expect to see that now, and am thrilled
> >> when I
> >> see the occasional Hawaii spots of my beacon.
> >>
> >> But one thing puzzles me.  It seems that I almost have a 
> 'pipeline'
> >> to
> >> KU7T in North Bend, WA, and to a slightly lesser extent to K2PO
> >> (Portland OR) (My QTH is Central California). Spots occur to them 
> on
> >>
> >> almost a daily basis (yes a few days go spotless), but what 
> puzzles
> >> me
> >> is not so much the spots, but the time of them.  I would expect 
> 10M
> >> prop
> >> to peak in the midday or late afternoon, or maybe at 'grayline'.
> >> But
> >> not these!  They most often occur WELL after nightfall.  Like
> >> tonight
> >> they are occurring from 0528Z to the present, 0612Z.  That is
> >> 10:28PM to
> >> 11:12PM local time.  They also frequently occur in the morning
> >> between
> >> 1430Z to 1630Z, but NOT later in the daytime like I'd expect. . 
> .
> >>
> >> NOTE:  You can see my spots at the following RBN site, set the 
> "Rows
> >> to
> >> show" button to 100 to see up to 100 spots at a time. NOTE:  On
> >> Friday
> >> Mornings (after midnight?) the database archive is wiped clean 
> and
> >> nothing will be shown until new ones pop up.
> >>
> 
> 
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