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- Early B&W and Projection TV (http://www.videokarma.org/forumdisplay.php?f=19)

- - DuMont Westminster Series II 1951 (http://www.videokarma.org/showthread.php?t=246865)

Quote:

Originally Posted by Ampico-kid (Post 2964235)

What's involved to construct a "color wheel", and how does it work? Would it be practical to construct one large enough for this set? I assume it would sit on top of the TV cabinet? How expensive it something like this? How well might it be expected to work? Bob

Making color on this set can be done most easily with the ready-to-fly converter mentioned in the post to Dave. This works by feeding a DVD player or other video source like a set top box into the converter, then tuning in the converter's CH 4 output using the Du Mont's tuner.

Now you need a wheel spinning at 600 RPM in front of the CRT. A color wheel for a 19 inch CRT will need to be about 46 inches in diameter to allow viewers seated left and right of the screen to get a full color view. A nice woodwork cabinet to hide the wheel and the mechanics is a good idea and it keeps pets, kids, and some adults away from the spinning disk. The circuitry to spin and sync the wheel to the color phasing pulse is not difficult and can be built using just transistors if you want to avoid ICs. Hope this helps.

All this begsthe question: Will it become appropriate at some point to move this discussion to the vintage color section?

Cliff

Quote:

Originally Posted by cbenham (Post 2964244)

See the Du Mont CBS color wheel 'mockup' [attached]. Cliff

The attachment didn't make it, probably because it has been posted previously
in another thread. I'll try again. This image is courtesy of John Folsom.
Cliff

If you are interested in building a color converter and wheel for your B&W TV set, the following will be found a very useful guide. Information on NTSC color converters from 1955 is available by clicking on the links below to the Early Television Foundation Museum website. Examples of both converters in full working condition are on display at the ETF Museum in Hilliard Ohio.

The first is the 'Colordaptor' which was described in a R/E magazine construction article. You had to build the electronic converter and the color wheel from scratch, although the authors made some parts available via mail order.
http://www.earlytelevision.org/colordaptor.html

The second is the Col-R-Tel converter, a complete, ready to install converter chassis and wheel system that sold then for $150.00. It could be installed on a set in an afternoon. Quite a number of these units are still operating today.
http://www.earlytelevision.org/col-r-tel.html

The avitar above is of my Col-R-Tel bought in 1960, restored and installed on a Philco 12 inch 50T-1403 about 3 years ago.
Cliff