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There are some Amateurs who’ve used the 2200m and 630m wavelength bands. Mostly using Morse Code, FT8 and WSPR modes as they are narrow bandwidth weak signal mo
by ianpenney 3y ago
There are some Amateurs who’ve used the 2200m and 630m wavelength bands. Mostly using Morse Code, FT8 and WSPR modes as they are narrow bandwidth weak signal modes.
https://youtu.be/FuugH6jn9rc https://youtu.be/FuugH6jn9rc
https://www.qrz.com/db/?callsign=dl4eai https://www.qrz.com/db/?callsign=dl4eai
In fact some of them appear to be transmitting FT8 even today.
https://pskreporter.info/pskmap.html?preset&callsign=ZZZZZ&what=all&txrx=tx&mode=FT8&band=80000-200000&timerange=86400&hideunrec=1&blankifnone=1&hidepink=1&hidelight=1&showsnr=1&showlines=1&hidetime=1&mapCenter=51.92092978087601,12.802860879871174,3.629299306028274 https://pskreporter.info/pskmap.html?preset&callsign=ZZZZZ&w...
- sebcat 3y ago2200 meter is LF (30-300kHz). Used mainly with huge coils and low power (1W EIRP). then there's VLF (3-30kHz). Then there's ULF (300Hz-3kHz) Then there's ELF (below 300 Hz), used by the stations in question. To put things into perspective. Speaking of VLF, SAQ will broadcast on 17.2 kHz on July 2nd. You can pick it up with a soundcard directly (not using a DVB-T chip) depending on your location and use of antenna.