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
