My 137kHz dual mode WSPR beacon is running. It randomly alternates between WSPR-2 and WSPR-15 mode (shifting frequency appropriately) Two callsigns are in use, G4JNT on -2 and G8IMR on -15, this
I've fired up my dual mode WSPR beacon on 137kHz, transmitting on both WSPR-2 and WSPR -15 in alternate, pseudo-randomly defined slots. To avoid confusion in the database, the WSPR-2 beacon sends the