From the gentleman who brought us JT65, comes something that sounds just as fun: JT9
From Joe’s blog:
If you are on 160 meters, or perhaps on 472 or 137 kHz, you may be interested in a new mode called JT9, designed especially for making QSOs on these bands. JT9 uses the structured messages introduced in 2003 for the JT65 mode, now widely used for EME and for QRP operations at HF. JT9 can operate at signal levels as low as -27 dB (in a 2500 Hz reference bandwidth), with one-minute timed transmissions. It also offers slower transmissions of 2, 5, 10 and 30 minutes duration, and the slowest mode can decode signals as weak as -40 dB.
160 meters is the only common HF band I haven’t had a QSO on, but then again, my dipole bottoms out at 80 meters, so I’ve rarely even listened to the “Gentleman’s Band.”