RCA had really developed for the first trinitron?
 

To read the reports the site http://www.earlytelevision.org/rca_d...al_onegun.html, it would seem yes. The project, it says, was abandoned because of convergence and low resolution problem.
Really interesting and still shows the absolute superiority of technology RCA

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you you you are right. GE developed the Cromatron from which developed the Sony Trinitron, but as I read, if I understood correctly, the basic idea had the RCA who then left for the reasons we know, was only to please a capacity of RCA in those years above all others.
Fernando

I thought CBS developed the Chromatron. Then I think it was their parent company {Paramount I think} that forced them to sell the design to Sony and they completed the development of it. I could be wrong though.

RCA developed a lot of stuff that they then never did anything with. Or much with. Liquid crystal displays was one thing that was developed at RCA labs, and then essentially abandoned (except probably patent licensing). And RCA developed CMOS and then they did develop some product (the CD4xxx series of logic chips, and the 1802 microprocessor) but it was other companies that took CMOS to where it is today.

In the late 70's RCA was kicking around the idea of CRTs with the electron gun down below, instead of the usual all the way behind the plane of the display screen. Like the Sony watchman CRTs except with the prospers on the front glass instead of Sony's prospers on the back glass. Would have made for a shallow TV cabinet. Heard that it did work, but RCA just finished building a new regular CRT manufacturing plant, and this new CRT would make that obsolete, so it was shjtcanned...

then I confirmed what I was saying, RCA over all. A true giant of the electronic world, as the Dutch Philips (NORELCO) was in Europe!

The Chromatron was developed by Ernest O. Lawrence (a physicist who worked on particle accelerators) and was often called the Lawrence tube.

http://www.earlytelevision.org/chromatron.html

thanks a lot! and cromatron in which color TV SET was used? and for how many years? or remained only a project in the drawer that after sony has finalised and marketed?

Search www.earlytelevision.org for more - it lists which companies developed sets using the Chromatron. Most or all of them never went beyond the prototype stage. One thing that was controversial about the tube was that it used about 30 or 40 watts of 3.58 MHz sine wave power to switch the color grids, which was a potential RF interference problem.

thanks for the information, I also thought that this type of kinescopio had not gone the other experimental study because I had never seen or heard of, TV SET that used the cromatron:thmbsp:

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if someone knows something about these things, please keep us informed, Thank you!

I thought the Philco Apple tube was the "original Trinitron". It's only a vague memory of something that someone explained to me, though.

Charles

Just because it has a striped screen doesn't make it an "original Trinitron."

The Trinitron still had 3 beams. The Chromatron and Apple tubes had only one electron beam, altough they used a striped screen. The Chromatron focussed the beam onto the desired color by means of charged wires behind the screen. The Apple was a beam-index tube that required the beam to be very narrow so it would hit only one color stripe at a time.

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