A Simple Television Demonstration System

The circuits and apparatus of a simple 150-line television demonstration system are described. The equipment employs the small type 1847 iconoscope as camera tube, remotely operated from the transmitter control panel. The transmitter is connected by cable to receiving equipment of which the principal item is a modified conventional oscilloscope. Some photographs taken of pictures on the kinescope screen are shown. It is shown that the low-frequency characteristic of a video cable driven from an amplifier plate circuit differs considerably from the characteristic of the usual interstage coupling.