WSPR Decoding Challenges

The https://github.com/rxt1077/wspr_spread work is pretty awesome. It helped us debug why our TCXO-powered-WSPR beacon was pretty decent on 4m band but flaky on 2m. Doppler shift value on 70 MHz: ... 70.0924994 VU3CER MK68 23 0 0.29 1 1 0 1 44 1 810 0.517 Now see the problem on 144 MHz: ... 144.4905417 VU3CER MK68 23 -3 0.12 1 1 0 1 39 1 810 0.865 Pretty all over the place! ...

September 21, 2025 · 1 min · 96 words · Dhiru Kholia