WSPR15 on the RaspberryPi

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.

Advertisements