161 Lima Victor 001
Operator Tomek
NE Poland, Loc: KO03KA
PSK

PSK31 or "Phase Shift Keying, 31 Baud", also BPSK31 and QPSK31, is a popular computer-sound card-generated radioteletype mode, used primarily by amateur radio operators to conduct real-time keyboard-to-keyboard chat, most often using frequencies in the high frequency amateur radio bands (near-shortwave). PSK31 is distinguished from other digital modes in that it is specifically tuned to have a data rate close to typing speed, and has an extremely narrow bandwidth, allowing many conversations in the same bandwidth as a single voice channel. This narrow bandwidth makes better use the RF energy in a very narrow space thus allowing relatively low-power equipment (5 watts) to communicate globally using the same skywave propagation used by shortwave radio stations.

                                                                                         https://en.wikipedia.org/wiki/PSK31

There are several programs available for TX/RX PSK, I most often use DM780, this program is included in the package of Ham Radio Delux software, which supports not only PSK, but also other digital  e.g. SSTV, RTTY.
With open propagation I invite to contact me also on PSK.
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