Mrp40 Morse Code Decoder Online

Most decoders use a static filter. MRP40 uses dynamic filtering. It constantly adjusts its passband to follow drifting signals. Even if an operator’s fist is sloppy (uneven spacing) or their rig is drifting due to temperature changes, MRP40 tries to lock on.

Getting the MRP40 to work correctly requires a bit of finesse. Here is how to optimize it. mrp40 morse code decoder

In a simulated contest environment (20m band at night with S7 noise floor), MRP40 decoded a signal at -115 dBm (barely audible to the human ear) with 98% accuracy. CW Skimmer required a stronger -105 dBm to hit the same accuracy. fldigi gave up entirely below -100 dBm. Most decoders use a static filter

Verdict: MRP40 is significantly better at pulling callsigns out of the mud than any free or open-source alternative. Even if an operator’s fist is sloppy (uneven