How far could I get with 10dBm?

At first I thought it is a joke, that a bare RasPi should work as a WSPR transmitter.
OK, I quickly burned an image, tuned my matching network to 160m, soldered a low pass filter and BANG! I couldn't stop stunning at the results.

This really carried me away and I also started tests on 40m with the same antenna. Here on 40m I could bridge the Atlantic, but comparing results 160m still seems to be more interesting.

I'll try to build a small PA with a BS170 and I'm already curious about the impact on 160m.

Thanks to all helping folks for their comments. Here especially DL2XL, Karl Heinz even called me to explain his antenna setup in detail.

gd dx es wrk u soon!