OK EME Milestones By OK1DFC, OK1DAI and OK1CA 1964 First EME echoes of KB4BPZ on 432 MHz heard by Ivo OK2WCG (now ZS6AXT - SK). He was using tropo setup with Yagi antenna and AF139 front end. 1975 First serious contact attempt on 432 MHz with WA6LET performed by OK1KIR …