Another RCA CT-100 discovery B8001599

[Penthode]

Originally Posted by old_tv_nut

The CTC7 and later chassis used the X-Z demod with output matrix/amp/DC restorer stages. Any direct R-Y/B-Y parent would not apply. Plus, it was more stable with tube drift due to the final DC restoration.

I had assumed the earliest sets would have all included I Q demodulators. Interesting that Westinghouse, purported to be the first color set sold, did not employ it.