THE SETtricolor history
a 19-inch tricolor picture tube design identified as developmental C73629.
The above scan of the 1962 GE picture tube manual correctly shows the RCA 15GP22 and CBS 15HP22 as 45-degree deflection angle designs, which resulted in the great overall length of these tubes for so small a picture. The 19TP22 (a photograph of this CRT has not yet surfaced) was a 60-degree design. Therefore, it is nearly two-inches shorter even though the screen is significantly larger. Note, also above, all three tubes use electrostatic convergence -- a practice quickly dropped, as it required extensive high-voltage circuitry to provide the modulated 10-kV convergence signal. [Updated 6-17-2002; 5-11-2004] [Return]
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