#JS8 is a digital #radio #communications mode derived from #FT8; "JS8call" is GPLv3 software for it derived from WSJT-X. “Jordan Sherer designed 8-FSK modulation”. For #QRP. Super low bandwidth.
on 02025-06-12#video on targeted offgrid comms with "T-Rex Labs" #paranoia. KT7RUN and KK4FMV are trying to communicate over a few thousand km using a 20-watt Xiegu G90 HF backpack ham #radio transceiver (20 and 17 meters). He mounts a mast on the trailer hitch of his jeep out in the middle of the Arizona desert and ran an inverted-V (dipole?) antenna from it, suffering a cactus injury. They’re going to try using the #JS8 digital mode with KN4CRD’s #JS8Call software on a Panasonic Toughpad running Ubuntu. Oh and maybe it’s actually 100 watts. He does succeed in talking to somebody in Tennessee with voice, and somebody in New York over JS8, and finally his intended contact. Finally he used a tiny pocket Garmin InReach MINI 2 satellite radio to communicate successfully.
on 02024-06-05