Re: Building 3BP1 tube NBTV Anderson monitor II
Posted: Tue Feb 07, 2017 5:58 pm
Klaas Robers wrote:Yes, this looks interesting. But it would look as if you had a oscilloscope tube with a white phosphor that you could make RGB. This is not true, because white phosphor is not white phosphor, but a mixture of blue and yellow. These two colours together give an impression of white, but there is almost no red in it and almost no green. So an R-G-B colour wheel will give a very poor colour rendering, especially in red and green. People will alway show yellowish faces and skins.
Besides that the colour repetition frequency of about 4 Hz is far too low to give your eye a mixture impression of red, green and blue. The already enoying flicker of 12.5 Hz will be 3 times as enoying.
So Klaas the flicker would be similar to this ...these were used a on web site to show CBS colour but i converted them to anigif...as with splitting the colours on your Avatar ..the flicker is pretty pronounced but for demonstrating its interesting and it think it would be fun to try .
Troy's pretty good at all this ,i think he would try just for the experiment .
Perhaps going non standard might improve the flicker .
So all white phosphor Crts a mix of blue and yellow ? as the Colour again seemed to work using a b/w tvs at the time for the CBS 50's system .
To test what ever crt what light colour it gives sending the light from the crt display via a prism show what colours it could work at ..