The RaspberryPi is the DDS Generator with Fractional Divider you didn’t know you had and very stable at that.
My PIC system needs to be Frequency Modulated I can’t modulate the DDS so I modulate a Crystal Oscillator, they drift so, so does my signal, not much but too much for WSPR15.
PE1NNZ has added WSPR15 to WsprryPi. I ran WSPR2 with my 100mW PA, G6AVK did not decode my signal. I arranged for a test with WSPR15 and bingo.
2013-04-02 21:00 G3ZJO 0.475814 -32 0 IO92ng +0 0.001 G6AVK JO01ho 127 79
2013-04-02 20:46 G3ZJO 0.475814 -31 0 IO92ng +0 0.001 G6AVK JO01ho 127 79
2013-04-02 20:30 G3ZJO 0.475814 -31 0 IO92ng +0 0.001 G6AVK JO01ho 127 79
2013-04-02 20:16 G3ZJO 0.475814 -30 0 IO92ng +0 0.001 G6AVK JO01ho 127 79
My signal at G6AVK in SpectrumLab.
This is in fact the most spectacular thing I have seen WSPR15 achieve on MF, the 127Km path was quite steady with little flutter or QSB so this test was a bit like a lab test, it produced lab type results.
As I have said before given realistic MF propagation WSPR2 seems to have the advantage over WSPR15.
QRP tests continue using the Pi and 1Watt PA, this I am driving with a FET driver which will also drive my 10Watt PA if want to go Power Mad.
Radio - LF/MF to Microwaves 