Horst, You need to change the frequency of the "1st mixer" : Options.. FFT Settings ... Center Frequency [Hz] . This reprograms the software NCO, and thus the displayable frequency range. Cheers, Wol
Dear Stefan, Paul, LF Group, Yes... I used the SpecLab "hard limiter" function for reception of DK7FC in the earlier tests in March. I used a 3kHz bandwidth filter (hardware in the preamp output), an
Hello Markus and group, Thanks for the info .. Markus Vester schrieb: Dear Roger, LF, the weak line on 8970.2 Hz has often been visible on Stefan's grabber, seems to be some sort of local spur. Talke
Michel, looking at your screenshot, I would agree that the weak trace on 6469.97 Hz was almost certainly caused by Stefan's transmission. Very nice! Best 73, Markus (DF6NM) From: [email protected]
Paul is asking who of the RX stations (except Wolfgang and me) has used a noiseblanker or clipper? Please a short info about the settings... 73, Stefan
Well done Stefan! Nothing seen in Birmingham I'm afraid but, as you say, the noise level seemed quite high. Your report reminded me of my first trips to North Scotland with the kite antenna on 136kHz
Yes Dave. I rememember your expeditions to Scotland and I was usually your first QSO on such missions. also you and I had the first ever 500 Kcs QSO by radio amateurs on the day the permits were issu
Hello VLF, results of what Pauls calls an "effective sferic blanking" look really interesting. Where could it be be possible to learn more about this kind of noise blanking and its implementation? Fo
Hi Daniele, Yes, the sferic blanking and / or clipping can be done in Spectrum Lab, too. Paul uses his on Linux-based toolchain of analysis programs, but the principle is very similar. What I will ad
What is the distance ?, information seems sparse. g3kev Wolfgang, yes your live stream shows that you are having excellent reception of the 6469.96 Hz carrier: http://abelian.org/vlf/nd.html . Since
Hi Stefan, Distance between JN49IS and JN18HP is nearly 459 km. Yes sure, and I'm already thinking to further improvements to the whole setup ! Michel - F5WK locator JN18HP 30 S/E Paris
Dear Roger, LF, the weak line on 8970.2 Hz has often been visible on Stefan's grabber, seems to be some sort of local spur. Talked to Stefan about an hour ago, and he was on the hill about to set thi
Hi Peter, yes the noise is terrible at the moment. But after activating a clipper, level 3 dB above average, the signal now looks better. See attached screenshot (taken from the same signal fed to th
QRN at my QTH on peaks is -50 dB. Atmospheric band noise around -70 dB ie QRN above noise -20 dB No environmental noise problems, antennas away from any possible noise source, out in the countryside.
Dear LF Group, Watching 6.5kHz here... QRN level dropped about 10dB from the overnight level, and the local QRM remains remarkably low here, with none of the buzzing, whirring and grinding sounds pre
I can see an unstable trace also mal/g3kev I see a trace at 6499,9 and on 6499,8. Could it be Stefan? Horst seems sure either. etc. ___________________________________________________________ Neu: WE
Wolfgang, yes your live stream shows that you are having excellent reception of the 6469.96 Hz carrier: http://abelian.org/vlf/nd.html . Since about 14:45, Stefan has managed to get > 0.9 A continuou
Hi, Well done, Stefan! I don't think that I received any significant signal. Will dive into the raw data next days. Unfortunately you did not transmit around 09:00 utc during a solar flare (C-Class).
Stefan just said that his kite is up now, but the 200 m antenna wire is sagging a bit too much , and he's going to cut a few meters off. Nothing here on 6499.8 / .9 Hz at this moment. But I did see a
Not sure, but on Markus' grabber I now see something around 6500.05 Hz : http://www.mydarc.de/df6nm/vlf/vlfgrabber.htm Nothing seen here (in JO42FD) yet, besides a few faint drifting lines. Cheers, W
