100° Picture Tubes

[zeno]

Originally Posted by Popester

Hey Zeno what is EFL?

Extended Field Lens. Basically 3 focus grids instead of one.
Panasonic & a few others also used them on some of there high end sets.

They also came up with FTM or Flat Tension Mask about that time.
Only in ZDS monitors & some military apps. they were 2K bucks new. Zenith told us if they used it in a 13" TV they would go for $1000 just to break even. Pix was on par with the best 35mm film. They became the flat & square CRT's of later years such as Sony Wegas.
https://www.chicagotribune.com/news/...070-story.html

73 Zeno
LFOD !