18-04-2020, 02:33 PM
(This post was last modified: 18-04-2020, 02:34 PM by David Cochrane.)
Early cathode ray tubes which displayed the TV picture weren't able to 'bend' the spot which scanned the picture onto the viewing screen very much, so as the screen got bigger, the tube got longer. In order not to have a massively deep cabinet, the tube was mounted vertically and reflected the picture in a surface mirror mounted in the lid of the TV - this is what you can see in the advert above. The tube had to display a reversed picture so that it came out the right way round when viewed in the mirror.