What materials were needed to make a tv in 1928?

Answer 1

In 1928, television was in its earliest days. Television was first demonstrated by John Logie Baird in 1925 in London and again my Philo Farnsworth in 1927. Both systems used mechanical parts and the fully electronic television that Farnsworth developed was still a year away.

Baird's television used a spinning disc with lots of small holes to create the image. A light source was positioned behind the disc. As the holes passed in front of the light, the intensity of the light was altered so that the holes would build up a complete image as they passed. So, the disc (called a Nipkow disc) and a light source were the main components. Of course, a motor was needed to rotate the disc and electronics were used to control the light level. It was important to make sure that the disc was always in exactly the right position in order to draw the image that was sent from the camera. More electronics were used to control the motor so that it was not only spinning at the right speed but also at exactly the right position at all times.

The BBC began the world's first public broadcasts in 1929 using just this system. Although it seems very basic and clunky by today's standards, it represented a big leap forward in communications and broadcasting back in the 1920s.

Answer 2

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