Quote:
Originally Posted by old_tv_nut
Edit: is it possible this comment refers to experimental tubes that preceded the production version of the 15GP22?
I have read that some early prototype tubes had a red phosphor that required using a color filter over the face, making for a really dim picture; not sure about the persistence.
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Exact quote from WESTINGHOUSE ENGINEER MAY 1954:
Was it possible that Westinghouse had early access to prototype CRT’s? Yes, but in the article, they talk about production CRT’s and only the 15GP22 was in production at that time. I found an article in Television Digest, May, 1954 talking about new RGB phosphors used in the forthcoming RCA19 inch CRT(cancelled) principally to increase persistence time.