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The Moto TS915/919 was a milestone in solid state design. All transistor, modular, and RGB drive to the crt cathodes, all this in 1967! The horizontal sweep module was so well designed that it was revived around 1971 for the TS938 with switch mode power supply - the dual HOT's had been paired down to one device with improved characteristics but still 100% interchangeable with the earlier module. I'd say thats a pretty good run. I have in my collection the TS-919. 934, 938, and 941. That covers juat about all the pre-Panasonic chassis variations (and I think it also satisfies my Quasar jones!). The module family used in the 941 seem to be the most reliable but they lack the personality(weaknesses?) of the earlier ones. I'm starting to see small signal transistor failure in the 915/919 IF modules. Looks like the vintage silicon doesn't last forever(increasing reverse junction leakage). But i digress......
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