- Home Page of 161SD012 Mario, member of Special DX'ers Radio Group SD, Poland Vice President & Magazine Editor. QSL Gallery, logs, QSL cards and many more useful informations about DX-ing.
Hellschreiber beacon project
- This web site describes a low power beacon system to be used for propagation and performance tests on the lower bands. The beacon offers CW (on-off keyed) modes and FSK modes; the traditional Morse ID mode, and Feld-Hell, another highly noise immune CW mode.