In 1954, Admiral (Bruce's, on top) and Westinghouse (Rob's)
The Set: Pete Deksnis's Site about the CT-100
Restoring a Vintage Color Television Set
used a second chassis located in the lower section
of each cabinet to develop low-voltages in
these, their first color sets.
The Admiral main chassis is shown
distorted to emphasize its power supply.
Multiple chassis design is indicative of prototype television sets from the late 30s through the mid 50s. Early NTSC color designs were no exception. That the RCA CT-100 used a single chassis suggests a more sophisticated design.