I bought the schematic from Colordaptor in 1960 or so. It looked good enough for me to collect all the parts, wind a delay line on a lathe, and build the 11-tube NTSC-to-RGB converter. The TV was a 10" Crosley 9-403M. I glued wooden blocks inside to support a 3/8" shaft to belt-drive the wheel from a 1947 Plymouth heater motor powered from my Heathkit Battery Eliminator (since I didn't have a 117vac motor). I drilled vertical counter-sunk holes in the hardwood blocks and kept them saturated with machine oil. The wheel was cut from 1/16" aluminum, 24" in diameter, and ran at 600rpm. Two pieces of colored celluloid (R, G, B) were held to the wheel with laquer and the wheel was sprayed black to eliminate reflections from the metal. The shape of the color cutouts in the aluminum resembled that of a bowling pin -- this shape was the result of graphically plotting the intersection of a rotating radial line against a downward scanning horizontal line, then allowing +/-20 degrees rotational phase error (the wheel position must be phase-locked to the vertical sweep in the TV) in the wheel position. The results were thrilling (after much work in getting it all together). And although the flickering mentioned by others was annoying, especially on a bright red object, the picture was good enough that we watched it for 4 years before I, too, bought a "real color TV" kit from Heathkit. The best color at the time seemed to be during the Kraft commercials and the Tonight Show. I did not see any significant smearing of color as mentioned in some articles; this problem might have something to do with the delay line needed to slow down the black & white video to meet the delayed color-demodulated video. I still have all of the above, and will very soon spend some time to make it all operational once more -- "for old times sake" and for the challenge. The subject of Colordaptor's design brings back many wonderful memories of a fun project.