VLF, ULF, This weekend there will be some activity on VLF and ULF! I'm running my next experiment on 2.97 kHz, my goal is to reach a 140 km distant location in France, JN38OO. During that time (recor
Looks good Stefan. I'll be looking for your signals. I assume the daily 100 character 5170 transmissions will be off until Monday. Currently I'm testing some changes to the sferic blanker. I can't re
Uwe, sorry to hear that. Here "Egon" broke one of my nylon lines last week, which was fortunately easy to repair. I hope to send some hours of carrier (8270.0025 Hz) and EbNaut (8270.100 Hz) this wee
Hello Paul, Does your sferic blanker fill the gap with zeros, or with interpolated values, or does it eliminate the gap? Or other? I have been planning to make a Matlab impulse post-processor that fi
Am 19.01.2017 22:54, schrieb Paul Nicholson: I assume the daily 100 character 5170 transmissions will be off until Monday. Yes, confirmed. A first test at 150 mA is running in the moment, since 23:15
Am 19.01.2017 22:54, schrieb Paul Nicholson: Looks good Stefan. I'll be looking for your signals. Is there already a visible peak? The ERP is 2.8 uW. The carrier is now running since almost 6 hours.
...sorry i just see that my frequency is 2970.000 Hz, not 2970.005 Hz as announced... 73, Stefan Am 20.01.2017 14:53, schrieb DK7FC: Am 19.01.2017 22:54, schrieb Paul Nicholson: Looks good Stefan. I
Wow, what a broadcast schedule! Probably there is too much noise at my QTH for recieving you on 2970 Hz Stefan, but grabbers are running (https://qrz.com/db/DL6II). Maybe I can improve the RX a bit t
Paul, Can you combine two transmissions on different frequencies or will that cause trouble? I changed the frequency for the tomorrows carrier between 8...17 UTC to 2970.005 Hz now but i could turn i
Hi Vinny, I'm about to change over the coil from LF to VLF, and if all goes well I'll attempt to send a 8270.0025 Hz carrier for a couple of hours already this evening. It would be great if you'd cat
Hi Stefan, in principle, combining transmissions from different frequencies should be possible, as long as a predefined common reference time is used for the phase When using SpecLab's GPS-phaselock,
I cannot see any trace of a signal at 2970 here, from yesterday's (20th) transmission. Not even the faintest hint, down to 0.03 fT. Now I will look for today's transmission... -- Paul Nicholson --
Your signal on the 20th detectable at Bielefeld via the online receiver of Wolf Buescher DL4YHF, distance 303.75 km! Just about exactly three wavelengths! So, you are transmitting Stefan! S/N is abou
Hi Paul, see http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html and http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/TX.png to follow the actual transmissions.. 73, Stefan Am 21.0
Hello VLFers and all, That's indeed a nice surprise, considering the low bitrate of the Vorbis-compressed audio stream that 'transported' Stefan's signal from here (Spenge-Bardüttingdort, near Bielef
Hi Stefan, it looks like the final EbNaut transmission lasted longer than expected, ending around 14:50 UT. One possible explanation could be that the 7 char message was inadvertently also encoded wi
A six sigma detection of DK7FC at DL4YHF's VLF rx at Bielefeld. A record distance of 303.8 km. http://abelian.org/vlf/tmp/170121a.png S/N is 15.9 dB in the 9 hour integration. The signal has been thr
