Of course were the first tries of OM Georg on the 2 meter band on AM. FM was at that time not used by the radio amateurs, because it was not easy to get the corresponding devices. Some qsl show that DL3LI was also activ on the 80 meter band. However his main interest were the tries on the 2 meter band.
OM Georg Zapf was not active for a long time. He works after 2nd world war from 1949 to 1952, that shows the old documents we have. Later he emigrate to the US. After returning to Germany in the 60`s he works as an engineer in a big German electronic company. No more amateur radio activities since this time.