I've resurrected my old QRSS U2 V2.07 but having problems in getting out using WSPR mode.
Everything sets up correctly. Transmissions start spot on time (using GPS module). WSPR cycles through all the elements but there is no transmission that I can determine.
In the settings I set the DDS module Reference Frequency to 125.00MHz but upon returning to the settings, no matter after what elapsed time - whether after one WSPR cycle or many - the Reference Frequency has changed. Sometimes by a few hundred Hz and sometime by over 1.5MHz.
I've encapsulated the setup in a draft-free enclosure and with a fairly constant ambient temperature. But still the problem persists.
Is this a common problem (not that I can find much reference to it other than 'atmospheric' causes), but can anyone(s) offer a possible solution, please?
Many thanks in advance.
(Ah, you may well ask why am I using an old U2 version? Think of it as advance planning leading towards acquiring the latest kit).
Roger Reeves M0ROJ