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
