Quote:
|
Originally Posted by prewtv
There were also Color TVs that used a Color Drum instead of a wheel around
a 17 or 20 inch B/W CRT.
|
Over the years, [lotsa] I have seen this photo displayed with two different captions. Most often this photo is said to be of a direct view drum set with a 17 inch CRT.
However, I have also seen the same set in pictures with front and rear shots, described as a projection set, and indeed the rear photo shows a small CRT and a Schmidt optical system but the color filters are built into the shape of a cone such that the light from the optics passes through one side while it spins, bounces off a large mirror on the rear wall and onto the screen.
The optical system is nothing I have seen before or since. It is not anything familiar, like the RCA KRK1-1, or the Philips Protelgram or the systen used by Philco with their TP-400 CRT.
Not only this, but I have also seen this picture ascribed to more than a CBS prototype, but I can't remember the name of the other manufacturer.
Could CBS have given the cabinet to someone else to build a different system into?
Does anyone have a definitive answer to this mystery?