Hello Peter and Markus,
I like playing around with the Todmorden grabber site.
when I first saw all the gaps in the
trace at 8970.0225Hz I was somewhat horrified;
did the TX switch
off and on that often?
no, it was permanent on the air as
shown by Peters and Lubos grabbers.
changing the rcv direction of the Todmorden aerial I
found the gaps filled.
p.e., when switching from the should be 80dgr to
70dgr the gap at abt 1700UTC the 7th of this month
filled,
but others came up of course.
seems the reflecting clouds are found off
the line btwn RX and TX stn too sometimes.
the distance btwn my
location and Todmorden is 765km.
GL
Uwe/dj8wx
Von:
[email protected]Gesendet:
07.02.2013 22:15
An:
[email protected]Betreff: Re:
LF: Re: 8970.022 Hz
Peter,
> Around 12 h UTC the signal is the
weakest in my oppinion.
This depends on distance,
frequency and the diurnal variation of ionospheric height (the
ceiling of the waveguide), resulting in constructive or destructive
superposition of groundwave and one-hop skywave. 9 kHz
propagation between Stefan and myself (also about 180 km)
exhibited the same minimum at noon. On the other hand, 400
km to OK or OE were usually best around midday.
Best 73,
Markus (DF6NM)
Sent: Thursday, February 07, 2013 9:37 PM
Subject: LF: Re: 8970.022 Hz
Hello Uwe, VLF
I did try to find the signal
maximums since ~3 Feb.
Here they are...
06h17 15h40
????? 16h20
0730
17h38
????? 16h00
The ???? are because there was
interference or sort of.
Looks like there are some maximums
around sunrise and sunset.
Around 12 h UTC the signal is the
weakest in my oppinion.
Best 73's Peter -
PA1SDB
----- Original Message -----
Sent: Wednesday, February
06, 2013 3:18 PM
Subject: LF: 8970.022
Hz
Hi dreamers,
the TX was off from
abt 1230UTC until 1440UTC today
because
1)
my XYL was working in the greenhouses (metal framed)
and
2)
I took the advantage repairing the aerial (one of
the anchorage ropes didn’t stand the sparks).
GL
Uwe/dj8wx/jo43sv
