The original Czechoslovak electro-technical industry which produced the communication material for the Czechoslovak Defence Force before the war, produced tenths of types for Nazi Army now. The radio-technical and electro-mechanical production on the territory of the Sudeten and he Protectorate of Bohemia and Moravia had the largest share and financial amount in the wartime production in the sphere of light industry. In 1939, Germans acquired considerable production capacities of the Czech electro-technical industry including the large companies of e.g. Mikrofona, Philips Hloubětín, Radiotechna Přelouč, Telegrafia Pardubice. Křižík and Military Telegraph Workshops in Kbely. Immediately after the occupation of the Czech lands, two factories were reorganised to wartime production which was planned by Germans before March 15, 1939, already. It concerned Mikrofona in Strašnice and Military Telegraph Workshops in Kbely which were attached to Ostmark Werke Concern in Vienna.
In the years of WWII, the Czech lands produced several tenths of final radio technical products for military purpose. Their complexity, labour constant and number of the components can be compared with the TV receiver in the seventieth. Amount of individual produced types can be counted in ten thousands.