DF5CL's blog

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.