Peter,
In my ecperience, this can explain why I hear western EU so much better
starting about 30 min before their SR.
Ray,N6VR
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Petr Ourednik <indians@xsmail.com>
Date: 1/31/18 3:44 AM (GMT-07:00) To: topband@contesting.com Subject: Re:
Topband: No 160m Sunrise Peak
Hi Roger,
as Nick, VE7DXR said already on this reflector I have to confirm that the
expected "peak" should be more or less the significant decreasing of the noise
in fact and due to that effect the rapid S/N improvement.
I reviewed my very old logs from 80's (when I was active on TB as OL1BVR almost
daily) and I found several notices in my log around the SR about dramatic
decreasing the noise during the grey line phenomenon on TB which is raised up
back with the coming full daylight.
On the other hand Dave, W0FLS and others referring to an increase in actual
signal levels (with corresponding increase in S/N).
So it looks like both of these effects are playing the role in the game...
Is there anybody who made an observation using some SDR + PC s/w spectrum
measurement during the SR/SS please?
Best regards,
73 - Petr, OK1RP
--
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On Wed, Jan 31, 2018, at 11:19 AM, Roger Kennedy wrote:
>
> Just to re-state something I posted a few weeks ago . . .
>
> I made a point of checking signal strengths last weekend in the CQ WW.
>
> Once again, there was absolutely NO increase in signals strengths around our
> Sunrise (0730Z), and if anything they started to drop off.
>
> This was regardless of how far west the stations were.
>
> Don't ask me why . . . in the old days, you would only bother coming on
> around Sunrise to work DX, as signals would increase by as much as 10 -
> 20dB.
>
> Roger G3YRO
>
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
--
73 - Petr, OK1RP
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G+: goo.gl/w3u2s9
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