Topband: Band Open - But No Sunrise Peak
us5we at bk.ru
Sat Jan 13 09:16:12 EST 2018
Unsuccessful attempts to work PJ7 on 160 meters showed no SR peaks here in KN29AU at all.
Worked a few NA folks in the middle of the night but no Carribbean.
Did not notice a JA SR peak either but looks like they are mostly on FT8 which I'll possibly use on 50 MHz only, so have no idea of what's going on there.
On the other hand, surprisingly, a few VU2s with good signals and decent RX abilities showed up recently giving not only a new country but a great satisfaction and assurance that the TOP band is still alive.
HNY to everybody.
>Суббота, 13 января 2018, 0:48 UTC от Nick Hall-Patch <nhp at ieee.org>:
>Thanks for the clarification Dave. When did you last see consistent
>SR peaks at your location?
>I suspect that
>http://www.swpc.noaa.gov/products/solar-cycle-progression shows the
>source of our difficulties. The highest level of geomagnetic
>activity in the present cycle started in late 2014. Up to that
>point, high latitude conditions in this location seemed pretty
>reasonable overall, considering the progress of the solar cycle, but
>since then, they've been fairly poor overall.
>Perhaps quieter geomagnetic conditions overall contribute to the
>likelihood of the occurrence of sunrise peaks in signal
>strength? (though that's difficult to tell if there are also no
>signals heard previous to sunrise due to poor conditions)
>At 21:30 2018-01-12, daraymond at iowatelecom.net wrote:
>>When I refer to a SR peak in my earlier post, I'm referring to an
>>increase in actual signal levels (with corresponding increase in S/N).
>>73. . . Dave, W0FLS
>>-----Original Message----- From: Nick Hall-Patch
>>Sent: Friday, January 12, 2018 11:23 AM
>>To: Petr Ourednik ; topband at contesting.com
>>Subject: Re: Topband: Band Open - But No Sunrise Peak
>>Wasn't some of the apparent peaking of signals at sunrise due to
>>improved signal to noise levels as noise levels drop at sunrise?
>>20 years ago for many of us, noise levels did actually drop at
>>sunrise. For many DXers now, (man-made) noise levels stay the same
>>after sunrise, so, no apparent increase in signal strength (actually
>>increase in S/N ratio).
>>This is not to say that there was no "real" increase in signal
>>levels at sunrise 20 years ago, just that it was perhaps less
>>frequent than was thought at the time. If someone has recorded
>>signal strength levels from that period, I'd be happy to be proved wrong.
>>This morning, in western Canada, a medium-wave broadcaster,
>>HLAZ-1566kHz from South Korea was audible until after 1700UT, an
>>hour past local sunrise, with a reasonable sunrise
>>peak. Yesterday, there wasn't much of a sunrise peak, and local
>>noise conditions haven't changed that much over 24 hours.
>>Was any west coaster on 160m on those two mornings?
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73, Victor Goncharsky US5WE/K1WE (UW5W in VHF contests, ex UB5WE), P.E.
UARL Technical and VHF Committies
DXCC Honor Roll #1 (Mixed, Phone), 9BDXCC, 8BWAS
DXCC card checker (160 meters).
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