Werner von Siemens Dial telegraph Morse's telegraph Telephone Carbon-arc lamp Electrical tramway Dinamo Vacuum cleaner Tantalum lamp The PROTOS cars Radio-receiver Circuit breakers Television High-purity silicon Ultrasonic scanner ISDN MultiMediaCard Fingertip sensor  Screensaver

The Gallery of Technological wonders Radio-receiver-transmitter In 1925 Siemens began the production of some models of radio receivers (an advertising poster is shown in the image). In 1935 the Siemens Radio-receiver "Shatulle" was manufactured : a 5-circuit 4 tube superheterodyne receiver for the long and medium-wave band. It already had automatic fading compensation and an electrodynamic loudspeaker. An advertising poster of a 1925 four-tube prototype is shown in the image.   Siemens S.p.A. 1999 - Milano Communication and Marketing Reproduction and use of the images and texts are prohibited.