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.
Plainfield Radio League
- An ARRL-affiliated club serving the Plainfield-area and Joliet. Sponsors the WW9AE 70cm ARES repeater 444.550 + 114.8. Meets last Wednesday of the month at the Plainfield Family Restaurant at U.S. Rte. 30 and Renwick Road at 7:00 p.m.