Regarding Observation 4122516
Jan, PE0SAT, has published a new type of transmitter for the DIY-1, FSK 500 BD, but I think it is wrongly set for downloading and decoding the recording. I leave you a recording in which the RTTY FM mode is used.
I hope the FSK 500BD mode setting can be corrected for the benefit of all.
73 Gustavo, LW2DTZ