Typically, you can make good round-the-world PSK31 contacts with 10-25W. PSK31 can often overcome interference and poor propagation conditions in situations where voice or other data methods of communication fail.Ĭontacts can be conducted at less than 100Hz separation, so with disciplined operation at least 20 simultaneous PSK31 contacts can be carried out side-by-side in the bandwidth required for just one SSB voice contact. The mode was enthusiastically received and has since quickly spread into worldwide use. PSK31 was developed by Peter Martinez (G3PLX) and introduced to the amateur radio community in late 1998. It works very well with low power levels and for this reason it has become a firm favourite for QRP and stealth antenna operators. A PSK31 signal just sounds like a single tone or note with a slight wobble and is used for real-time keyboard-to-keyboard informal text “chats” over the air. Unlike RTTY (radio teletype) the characters are formed by changing the phase of the sound wave, not by using different tones. PSK31 stands for Phase Shift Keying 31 baud (or 31 bits per second/bps). PSK31 is a highly-efficient data mode that lets you work long distances, even when you can barely hear the signal.
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