Happy days are here again .. and
my local MW station is still qrt 
Yes , ref , your 8K test's some time
ago , I remember you reached TH3
?? , Gary also had a trace from
your signal.
short range ... Kent ?
Well , OP4H test , ground tests have been
carried out in the usa and several miniature
test ranges using the output from a sound
card and a remote Rx at the end of the garden ,
giving levels round -45 -50 dB with
'real' noise .
73-G..
Sent: Saturday, September 22, 2012 10:03 PM
Subject: Re: LF: Experimental software for WSPR-8 and
-32
Hi G.,
Am 22.09.2012 22:54, schrieb Graham:
Stefan
If you can generate the signal of your
previous tests , I don't think the range
will be that short !!
Ooh, what was my
previous test? I've done several previous tests in the last 24 hours :-)
And
please define short range :-)
Probably you mean VLF (?). Well, i know that
OK2BVG received my complete call in DFCW-600 on 8970 Hz, while i was using the
fixed LF antenna here and run 350W...500W RF power. So this is to be beaten.
OK2BVG is in about 600 km distance from me. So there are chances for UK stations
as well.
I think DF6NM or maybe DD7PC would be a good partner for first
digimode tests. Not to forget Paul Nicholson!
Am i right, ther was no
OP4H VLF test so far at all? (I mean VLF tests using RF systems, not a cable
from the sound input to output).
Yes, it's definitely time for VLF
again!
73, Stefan
Due to the long tx pulses of OP4 Hr ,
the signal will also show on spec-lab , so
test data is not lost , if decode fails
.
The software produces the 8K audio
tone via the sound card and has the com-port
on/off keying output as well , normal sound
cards are suitable , the software inputs
directly at 8K using sound card as
SDR
If you have a target date , I can
post in the Op group for monitor's
73-G.
Sent: Saturday, September 22, 2012 7:14 PM
Subject: Re: LF: Experimental software for WSPR-8 and
-32
I'll give it a try Graham. The problem may be to find
monitoring stations in a short range...
73, Stefan
Am 22.09.2012
17:20, schrieb Graham:
And of course there is a
240 SDR data mode , all
ready for 8Khz tested to -50 dB as bench
mark : )
Sent: Saturday, September 22, 2012 1:57 PM
Subject: Re: LF: Experimental software for WSPR-8 and
-32
Hi all,
Hmmm, theoretically we can generate every
WSPR speed now. Markus, should we try a WSPR-256 on VLF/ 8970 Hz? :-) I
still have the big coil in the cellar and the band looks fine
:-)
Remember the "old" times... http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html
73,
Stefan/DK7FC
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