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Originally Posted by avalon1308
Does this means all different brands used RCA chassis.
When did magnavox start producing their own chassis (If they ever did) I can see from some RCA brochures that Magnavox had the same chassis lay-out in the beginning of the 60's
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Interesting question --
In terms of copying - some places copied RCA (after paying for the right, of course), others not. Zenith built their early prototypes in an "Erector Set" sort of frame, then changed out circuits as they developed new ones. They were very fond of the gated-beam tube that they had invented, used it for both color demodulation and the burst gate tube in that chassis. Continued using it for color demodulation for a long time. Admiral, on the other hand, was one of the copiers.
In terms of buying complete chassis or sets from RCA, I don't know if any brands may have done that. Maybe someone else here does. I think it was more common for some manufacturers that copied RCA to then private-label sets for department stores, etc.