Quote:
Originally Posted by earlyfilm
The mention of an overall yellow filter by the author is counterproductive. It would be far more efficient to reduce the density of the complimentary color, blue.
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1) You mean increase the density of the blue filter (make it darker).
2) Although this is the first time I have seen a proposal to use an overall yellow(ish) filter, it makes sense to me, and it should not cause a terrible decrease in efficiency because it's a relatively gentle spectral tilt. Putting one of the suggested filter combinations in the wheel and then doing a fine adjustment to white color with an overall filter seems like a much better idea than trial and error adjustment of the color segments. Refer to Cliff Benham's work posted on this site and shown at ETF. He can get the needed final tweaks from the RGB gains in Darryl Hock's NTSC-to-CBS converter, but in 1951, circuitry for individual RGB gains in the receiver adaptor would have been considered too complex.