Monitoring WSPR for ~12 hours during the day with the same 20m EFHW. VK3MO‘s setup doesn’t count, it’s way too impressive 🙂
Monitoring FT8 on 20m for 24 hours with a Raspberry Pi, Gqrx, an SDR stick and the crappiest possible installation for a 20m EFHW antenna.
Monitoring airplane traffic with a RTL-SDR and dump_1090.
Let’s see what a rtl_sdr can catch around the public 433 MHz frequency, where many devices operate.