Cross sections of a radio cable (on the left), installed between the studios of the Austrian Radio Verkehrs AG (RAVAG) at Johannesgasse 4 in the city center and the transmitter on the Rosenhügel in Vienna in 1926, and of a telephone line (on the right), printed in Radiowelt (Vienna), 9/11 (March 12, 1932), p. 340.

image/jpeg