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Does the RCA TM21 monitor use the same video output setup like the CT-100?
The CT-100 appears to be akin to modern solid state drive to the CRT with "Y" and color on the cathodes (hope I'm right but I'm at work away from my CT-100 schematic) (I know, blasphemy) from what I remember. The later color sets had "Y" on the cathodes and color on the control grids.
Both color and "Y" appear to be capacitor/resistor coupled (at least on my Magnavox T933 and Zenith N chassis.
I cant find any schematics on the TM21. Any chance of some postings?
Also, I might be wrong again, but I remember attending a Zenith service meeting in the 1970's (hope that's right) when they actually had a modified video module to remove DC restoration from their solid state sets because it would go black between scenes and the customers thought it failed until it came back on.
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