Quote:
Originally Posted by miniman82
It's hard enough getting enough brightness through the colored filters with a modern CRT, a pre-ww one would be an exercise in futility.
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A color wheel unit needs to be built on a TV with an aluminized CRT. The sets
at the ETF Museum all have aluminized CRTs but still the pictures are somewhat dim and best viewed in a darkened room.
The reason for this is that the color filters absorb 90% of the CRT brightness.
A set that produces a bright image of ~150 Ft. Lamberts only has a 15 Ft. Lambert image when a color wheel is spinning on it.
Projection sets like the RCA 648PTK or a Norelco PT200 are already dim at a brightness of only 15 to 20 Ft. Lamberts. Installing a color wheel on one of these sets would reduce that to around 1 to 2 Ft. Lamberts and require viewing in a totally darkened room.
Still, several people have done this in the past and watched beautiful color in the dark.
Cliff