Hi Jay ;-)
Great! That seems to be the best what we both got so far. Propagation
must be excellent. 35 dB S/N in 28 mHz, that must be close to audible,
right? Did you try to listen during watching that spectrogram? :-)
It could be worth to run a CW beacon over night...
In one of the coming nights i want to do a WOLF (10) VLF test again.
Now i successfully built a class D PA with the LOPT. The exact carrier
comes from a SpecLab instance, 17940 Hz / 2, i.e. i get a exact 50%
duty cycle which is essential to drive this class D PA, 2x
IRFZ48N, running at 12V DC supply voltage. The 17940 Hz is feed through
a fiber optic link. The PSK comes from a separate fiber optic cable and
is generated by playing a wav file in Winamp, which drives the TX LED
from the soundcard. So now i can generate the carrier on the VLF
grabber PC and the PSK on the LF grabber PC ;-)
I expect a new "DX" this weekend...
73, Stefan/DK7FC
Am 10.02.2012 12:20, schrieb [email protected]:
Stefan & group
Check out capture at http://www.w1vd.com/grabber.html grabber 1 ... at
times 35 dB s/n noise last night! 'Dogbones' are evident as well as
some 'spreading' of the signal into nearby bins. This is usually only
seen on strong domestic signals.
Jay W1VD WD2XNS WE2XR/2
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