A free and familiar drop-in alternative to JS8Call: 64 WPM Subspace mode, a mesh network that relays around poor conditions, a live spots map, and JTTY conversations across the whole waterfall. New usability features are 100% compatible with every JS8 program on the air.
Windows, macOS, Linux and Raspberry Pi. Open source (GPLv3). Installs beside your current JS8 program.
Subspace speaks plain JS8 to everyone, and adds a faster mode and smarter tools for when you meet another Subspace station.
Four times JS8 Normal, good to about -16 dB. A fifth speed beside Slow, Normal, Fast and Turbo.
Subspace mode syncs to the signal itself, not to clock time, so clock drift never stops a decode.
When the band won't reach, auto-route finds a relay path through stations it has heard, or you pick the hops yourself on the map. Any JS8 program can relay.
Messages, files, web links and ICS-213 forms arrive complete, with automatic repeats until every part is confirmed.
Announce yourself in under 4 seconds with no flood of replies, and let the other station know a reply is on its way.
A built-in map of who hears you, updated every few seconds, with PSKReporter spots that are not rate-limited.
JTTY is a keyboard-to-keyboard mode for real conversations. Subspace makes it simple to find people and talk with them.
A step-by-step guide takes you through a complete QSO, click by click. Tip: call CQ between 1200 and 1800 Hz to reach stations running WSJT-X, then move to a quiet spot together.
Read the JTTY how-toClick any screenshot to see it full size.
Every station that heard you, colored by signal strength, with lines to each one. Add PSKReporter spots, choose 5 to 60 minutes, pan and zoom.
Call signs are written right on the waterfall, color coded, at the offset and moment each station was heard. Click a label to start a QSO.
Band activity organized by call sign instead of by frequency, so a busy band reads like a list of people. Calls to you are highlighted, and finding a call sign is one search away.
Open a window for any station and follow just that conversation, in both directions, with your own messages shaded. Open as many as you like.
Read the band, follow the conversation and send, from any phone or PC browser. Nothing to install on the phone.
Subspace installs to its own folder and never interferes with your existing JS8 program or settings. Run one or the other, whenever you like. It talks to every JS8 station on the air; the extra speed and tools kick in when you meet another Subspace station.
Free and open source. Questions, ideas and how-tos are in the Subspace discussion group.