|
Thank you Lubos and Peter!
Paul Nicholson's http://abelian.org/vlf/sg8270.php is also starting to show the two carriers. Even though his
synthetic loop antenna is pointing to 70 deg azimuth, a tick too far
north for me.
I'm currently driving 0.3 A into the fairly
small antenna (24 kV at 240 pF). The effective height was measured as 9m at
LF, probably slightly lower at VLF, maybe 8m or so. At 36.3
km wavelength, this would give 77 microohms radiation resistance and 12.6
uW ERP. The synchronisation is derived from DHO 23.4 kHz taken off a small
loopstick. Judging by the interference pattern on the local Loran
monitor (GRI 7001 on http://www.df6nm.de/LoranView/LoranGrabber.htm),
the phase of the VLF carrier seems to be stable.
Best 73,
Markus (DF6NM)
Sent: Sunday, April 07, 2013 11:41
AM
Subject: RE: VLF: Sunday morning test
8270.020 Hz
Hello Markus, Peter and VLF!
Well done! There are two signals on my
grabber now. Great!
Markus, your VLF set is doing very well.
Although you are useing "QRP" only (as you wrote in your e-mail), the
signal is nicely visible here. Congratulation!
73!
Lubos, OK2BVG, JN88KS
Great, it seems to work! DJ8WX had
apparently interrupted his carrier for an hour but has come back. To
my surprise, I seem to be making it to Appingedam as well
Thanks to Lubos and Peter for monitoring
and running your excellent online grabbers, and to Uwe for motivation and
company!
Best 73,
Markus (DF6NM)
Sent: Sunday, April 07, 2013
8:45 AM
Subject: RE: VLF: Sunday
morning test 8270.020 Hz
Hello Markus, VLF!
I am looking forward to see your signal on
my grabber. It would be fine to see both signals, from Uwe and you,
together.
73!
Lubos
This afternoon I have
resonated the venerable seven-bucket VLF coil to my home
antenna on 8.27 kHz, and I'm currently running a test transmission on
8270.020 Hz. Assuming appropriate weather conditions (ie no wind and rain,
but cold and grey so that the neighbours won't want to enjoy their gardens and
complain about the tone), I intend to join Uwe 5 mHz below his
carrier, for a couple of hours starting sometime around 8 UT tomorrow. The
signal will be weak (10 uW ERP) but I'm hoping to leave a trace in Lubos'
grabber window.
Best 73,
Markus (DF6NM)
|
