I developed a GPS stabilised frequency reference that goes about disclipining an oscillator in a different way than most. It can also function as a stand alone WSPR beacon.
The power point file is available on this site named ddsref.ppt (link below)
We will get a bunch of boards loaded for sale in the next few months. I have a handful of V1.0 blank PCBs (double sided, silkscreened , masked) if anyone wants them.
Additionally, Inspired by other’s work, (VK3WRE/VK3ZYC), I will develop a very small and thin low noise DDS clock generator that uses a 10 MHz input and provides auto switchover to internal. It can generate ANY frequency for any radio. This can work in conjunction with any external timebase, 10 MHz being a standard. It will also fit in an FT817 without removing other plug in boards.