Echo-Echo DX Group
- The ECHO-ECHO group is an International Radio Club of 11 meter operators. The Group was founded on spring 1989 in Warszawa, the capital of Poland, to study propagation and to promote friendly and brotherly relations among radio operators in the world.
Chicago Suburban Radio Association CSRA
- The Chicago Suburban Radio Association CSRA has been serving the Amateur Radio community since it was founded in 1924, ``one of the oldest radio clubs chartered in the State of Illinois.