Hi Paul,
Yes, I noticed the "blips" on the qrs120 grab, I have no idea what or why.
The sig on 8270Hz is local test, just from the DDS VFO to a short wire.
73, de Gary - G4WGT
MF-LF-VLF Grabber : http://myweb.tiscali.co.uk/wgtaylor/grabber2.html
Web : http://myweb.tiscali.co.uk/wgtaylor/index.html
.
On 12/03/2016 19:09, Paul Nicholson wrote:
Looking at Gary's page
http://myweb.tiscali.co.uk/wgtaylor/grabber2.html
My signal shows up well on grab 2 but grab 3 there are
some glitches which I can't account for.
And scrolling down to grab 5 there's a signal on 8270
today which doesn't appear on my spectrogram here.
Perhaps Gary is doing some near field testing.
So far I don't seem to be making any impression on
Markus' receiver at
http://www.df6nm.de/grabber/Grabber.htm
but the signal is clearly getting as far as Heidelberg
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_LF_DX_Grabber.html
Looking to change frequency soon. Stefan advises 137.5 +/- 50Hz
to make use of OPDS receivers and Domenico suggested the lower
end of that band. So maybe I will try
Frequency: 137455.00000 Hz
Coding: 8K19A
Chars: 12
Symbols: 848 at 2 seconds
Duration: 1696 seconds, 00:28:16.00
Repeat: Each hour, XX:00
Will start at 20:00 unless anyone has a better suggestion.
Probably QRT at 00:30 after the 00:00 message has completed.
--
Paul Nicholson
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