The Motorola Color TV Service Manual, By Forest H. Belt (SAMS), says that the 607-series UHF tuner was the ony one that used a tube (for the oscillator), and that it was used in the TS-912 chassis. The schematic shows a 21FBP22 CRT. A sketch of the front panel shows large knobs for channel tuning, with numbers on the outer part showing through a wedge-shaped window at the top of the dial.
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