2 links
Official PSK31 Site
aintel.bi.ehu.es
A new digital mode useful for keyboard to keyboard QSOs. Works at 31.25 bauds. Easy to use and monitor. Gives very good copy under poor SNR and is thus suitable for QRP. Uses BP…
RTTY Fan Club
geocities.com
Everything about HF digital modes. Operating, contesting, software, hardware, DX information and bulletins, clubs, societies, and links.