SAQrx is a soundcard based USB (Upper SideBand) receiver covering 0-22 kHz. The filter bandwidth is selectable in three steps, 300, 1000 and 2400 Hz.
SAQrx was written primarily for reception of the 2006 Christmas transmission from SAQ but it was made tunable so it can be used for other purposes while waiting for the next SAQ transmission :-)
SAQrx requires a soundcard capable of full duplex at 44100Hz sampling frequency. Most soundcards can do this.
More information about the old longwave transmitting station SAQ, which was declared as a world cultural heritage by UNESCO in 2004, can be found at http://www.alexander.n.se and at Wikipedia.
Download the SAQ receiver here (SAQRX06.ZIP, QRP size! Only 26K)
Installation is simple: Just unzip the file in a folder of your choice. There is only one file, SAQRX.EXE, just double click it to start the program.
Removal is even simpler: Just delete the file SAQRX.EXE.
(Unlike many other Windows applications, SAQrx will not create a lot of strange
files all over your hard disk, it doesn't write any file at all, neither does it write anything
to the system registry.)
How does SAQrx work? (SAQRX.PDF, 195K, this file is also included in the full source code package below).
Download the full source code (SRSRC06.ZIP, 256K)