SP550MK - SO550MK - SQ550MK - Nicolaus Copernicus

[4L5A]

Radio Amateurs members of the Dobrzycki Klub Krotkofalowcow, SP3PDO will be active with special calls SP550MK, SO550MK, SQ550MK, 550th anniversary of the birth of Nicolaus Copernicus, which falls in 2023
SP550MK Team - SP3TYJ, SQ3WRL, SQ3LMR.
SO550MK op - SP6DAN.
SQ550MK op - SP9CJM.