K4ACI 1926 Deutschland

QSL card sent to Barbara Dunn G6YL.
Started as a SWL in 1925.
Licensed in 1927 at EG6YL, Britian's first licensed YL.

Dr. Wilhelm Ludolf Schmitz, DE 0072, "MARS", since 1925: KP6, K4ACI, EK4ACI, D4ACI, QRT after 1933. Dr. Schmitz was one of the first phone stations appearing on the air in Germany. His transmissions under the mysterious call sign "Mars" became legendary during a time when transmitting was strictly prohibited in Germany. He became a member of the "Verein der Funkfreunde Mülheim/Ruhr in 1924. He then moved to Bonn where he took a position as assistant professor at the Institute of Physics at the University of Bonn. When the DASD was founded in 1927, Schmitz was one of 56 founding members of the DASD and he served as the delegate for the "Rheinland" in the club. When Hitler came to power on January, 30, 1933 all radio licenses were revoked. W.L. Schmitz, D4ACI withdrew from amateur radio and resigned from the DASD.
Sources: http://www.ovkoeln-g10.sw9.de/home/vorwort-zu-dem-chroniken/chronik-koeln-aachen.html
W. Koerner: Geschichte des Amateurfunks, Koerner Verlag, 1963.

QSL K8CX Collection
Info courtesy of K6EE