New Color Picture Tube System for Portable TV Receivers

Since RCA introduced the internal pole piece gun in the 700 picture tube in 1954, dynamic convergence of the individual beams has been the standard of the industry. With the 900 precision in-line color picture tube assembly, RCA introduces a totally new concept in color television display system utilizing an advanced design of the electron gun, the deflection yoke, and the picture tube to achieve superior performance in a simplified inherently lower-cost system. The combination of a precision unitized close-spaced in-line gun and a line-focus type PST ( precision static toroid) deflection yoke makes practical the first inherent self-converging color system. Convergence equivalent or superior to that of present commercial receivers is achieved without the use of any dynamic convergence correction or circuitry.