Success with 2m WSPR!

OCXO's are awesome - this is what I learned while trying to get WSPR working reliably on the 2m band. Hardware Here is all you need for reliable WSPR'ing on the 2m band: A RAW OCXO "can" works fine too! Note: This modded Si5351 board image comes from SimonsDialogs. Essentially we are modding the CLK2 output port to become an input port which accepts the OCXO's output signal. ...

September 25, 2025 · 3 min · 447 words · Dhiru Kholia

WSPR Decoding Challenges

The wspr_spread work is pretty awesome. Doppler Spread It helped us debug why our TCXO-powered-WSPR beacon was pretty decent on 4m band but flaky on 2m. Doppler spread 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 ...

September 21, 2025 · 1 min · 147 words · Dhiru Kholia