Hi Stefan, looking through stored screenshots from the DL0AO grabber, I noticed a fascinating detail: During night hours where resonant spherics appear around 1670 Hz, mains interference on 1650 and
Hi Markus, Thanks for the images. Interesting! I checked the spectrograms (i've produced another one from last night) and found that my hum filter was actually NOT enabled, so i do not see a 50 Hz ha
Hi Stefan, all, as you say, the fact that the enhancement is also visible on 1550Hz makes it unlikely that the 1650 Hz boost is really due to an ionospheric resonance. This is corroberated by a plot
Hi All, ELF propagation is a fascinating area, and not at all understood. Transmitting test were done from London using a Tesla transmitting antenna, and the signals received world wide on 1.6 Hz. A
Hi Markus, Thanks for your contributions. I hope that we can get further understanding with the coming vlfrx-tools based system at DL0AO, in combination with data from blitzortung.org. Then we can lo
