WSPR beacon with Raspberry Pi 3B+
2021-05-07-raspios-buster-armhf.zip OS was used on Raspberry Pi 3B+. Using code from WsprryPi, Raspberry Pi 3B+ was made into a WSPR beacon. 20M WSPR with 100 mW was tried. A tuned amplifier was used to get 100mW on 50R. Three tuned circuits in the input removed harmonic energy. Here is the circuit.. Circuit was made using ugly construction on a thin solderable GI sheet. Here is the picture of the 20M WSPR board. A number of transmissions were made with this command... pi@pi3:~ $ sudo   wspr   --repeat   VU2NIL   NL32   20   20m Got a few spots from wsprnet Timestamp           Reporter 2021-07-14 12:24 BD7MQB 2021-07-14 12:24 BA7IB-3 2021-07-14 12:24 BG7IBS 2021-07-14 13:34 VU2PTT 73!