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

[Phil]

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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