FSQ - Fast Simple QSO (chat) mode for HF and VHF

There is a new chat digital mode that is really slick that I have been testing. It's called FSQ for Fast Simple QSO. You can read all the details on FSQ <--HERE on ZL1BPU/ZL2AFP's web link. This mode has four speeds 6, 4.5, 3 and 2 baud. Sensitivity is believed to be about -13 dB SNR at 6 baud, and -16 dB SNR at 3 baud. That's about 10dB better and several times faster than 12 WPM Morse. The speed setting only effects the transmit speed of the app and when monitoring it will capture any for the four speeds on receive (auto-speed adjust).

The coolest feature is SELCAL. You can have it monitoring on a frequency and it will not print anything unless the message is addressed to your call sign. There are many other features with SELCAL as well including the ability to query another station to get your signal strength, their location, etc. For being a Beta version it works pretty well. I have just been testing "Acoustically Coupled" between two PC across the  room so the next step is to try it on the air. It will be interesting to see if this is usable as a QRP NVIS mode. I plan to test it on receive with a 600 Hz CW filter.