gadget.tar.Z Compressed tar archive containing the schematics, artwork and related information for (a) a modem for the Canadian time/frequency radio service CHU, which can be used as a primary reference clock for NTP Version 2 and Version 3 daemons, and (b) a pulse shaper and line driver used to provide an external one-pulse-per-second signal from a radio clock to a serial port. loran.tar.Z Compressed tar archive containing the schematics, artwork and documentation for a computer-controlled LORAN-C timing receiver used as a precision source of standard time. Not recommended for beginners. modem.tar.Z Compressed tar archive containing the sources, binaries and documentation for a DSP modem designed for high frequency radiotelegraphy.