@oh8hub @clacke @hb9hox You did not mention the band for your 1000 km QSO, but I get the point. But my point was not about performance, but rather about transparency, openness and understanding, and how it relates to what one could call the ham spirit. There is no *understanding* here because the VARA developers (as ROS developers) have decided to hide their success behind a secret algorithm (which, by the way, has a bandwidth of 2 kHz [compare that to the few Hz taken by CW or PSK or FT8]).