Quote:
Originally Posted by Electronic M
Well I know that Zenith waited untill about 1948 to make consumer TV sets so they could make the best ones on the market....I sort of assumed they just did the same thing when color arrived, but this rumor is makeing me think otherwise.
Also I think that the Zenith 15" prototypes used the 15HP22 which was their electromagnetically converged variant of the 15GP22(which RCA created, and was ELECTROSTATICALLY converged). I assumed that RCA was fine with them experimenting with the modifications of their CRT in hopes of advancing color TV, but now I wonder....
|
Quote:
Originally Posted by jr_tech
Huh? Are you sure of that? The early tube manuals that I have show that both were electrostatic convergence (and had the same base connections). The difference being that the HP22 had the phosphor dots on the curved faceplate, rather than on a flat plate inside the jug.
jr
|
The one I saw, had the RCA type convergence and flat phosphor plate. In fact to test the tube, the former owner drove it with a CT-100 chassis. I think I read something about another earlier Zenith prototype with a different tube, but the 43M20, I believe, was a pre-production prototype (to go to market virtually as-shown at some point), similar to the RCA Model 5, which had very few changes when it became the CT-100.
Charles