Sylvania brochure

[John Folsom]

While some I know have said "yes", I have seen on documented evidence to support it. I would LOVE to be wrong! The 15" set and their first 21" set did not have halolight.

[jr_tech]

When I was looking for pictures of the CTC-4 clones, I got near the bottom of this page:

http://www.earlytelevision.org/21_inch_color.html

and saw the Sylvania "Granada" and "Saratoga" which both have very nice white, sort of halo-light looking masks, and got excited thinking that they might indeed have used halo-light on some early color sets... darn!

jr

[jeyurkon]

Originally Posted by John Folsom

While some I know have said "yes", I have seen on documented evidence to support it. I would LOVE to be wrong! The 15" set and their first 21" set did not have halolight.

It seems that you're right. http://en.wikipedia.org/wiki/Sylvania_Electric_Products

See the advertising section.

John

[old_tv_nut]

Originally Posted by jeyurkon

It seems that you're right. http://en.wikipedia.org/wiki/Sylvania_Electric_Products

See the advertising section.

John

This reference claims that it was too difficult to match the gray scale tracking of the color CRT to the halolight. I think that if Sylvania had built their own chassis with an improved tracking arrangement, it would have been possible and would have resulted in a set with much more consistent color than the competition. The procedure would be to adjust first for cutoff (like later chassis with a set-up switch), then adjust drives to match the whites to the Halolight, then maybe one round of touch-ups to cutoff and drives.
The early chassis that had G2, cathode DC cutoff AND drive controls definitely would have been too difficult.

Edit: too difficult and time consuming in the customer's home. Not too difficult for TV nuts like us; witness what Pete Deksnis et al have been doing at ETF.