Colour recovery from B&W kinescope films

[dtuomi]

Actually most B&W kine's of color shows in the U.S. were made with B&W picture tubes. I had an engineer mentor of mine who used to get stuck babysitting one when he was a bad boy at ABC. Apparently they used blue phosphors in the tube because the film they used was most sensitive to that color (even though it was B&W).

Anyway, NTSC is real easy to notch filter out, and everyone did it to prevent the color info from causing any unwanted "random" patterns on the films. So almost no kinescopes of American color television would even have any color information in them at all.

David

[Joel Cairo]

Originally Posted by dtuomi

Actually most B&W kine's of color shows in the U.S. were made with B&W picture tubes. I had an engineer mentor of mine who used to get stuck babysitting one when he was a bad boy at ABC. Apparently they used blue phosphors in the tube because the film they used was most sensitive to that color (even though it was B&W).

David

At ABC and (until 1966) at CBS this was true, but NBC actually began shooting a portion of their kines off of color monitors starting back in the 50s.

And although CBS may have continued to use their old B&W kinescoping setups, once they switched over to color in 1966, they didn't really bother to filter their signals-- their kinescopes from that period forward are far inferior to the ones they produced in prior years.

- Kevin

[dtuomi]

That's interesting. I wonder if they were trying to use color film to capture the kine. I can't see any point in using one if you're just using B&W film. Anyway, I revise my statement, it was true of ABC.

David