Today's Mystery Guest (RCA CTC-4)

[Electronic M]

Originally Posted by stromberg67

I don't really know about other chassis, except that most of my older sets look maybe just OK, but my CTC-4 luminance section probably couldn't be more "sharp", or provide a more excellent picture. Chroma is also very good, but narrow band, as most know. Perhaps just a lucky circumstance, or maybe an extra measure of diligence to provide decent pics to encourage sales.
My 4 also has a correct gamut CRT, before the "gray screen" tubes. Best viewed in a totally dark basement LOL.
Kevin

My CTC-4 produced one of the most detailed, sharpest monochrome pictures of any vintage set I've owned when fine tuned for best best monochrome picture...

[Phil Nelson]

Before I cry Uncle and throw a tarp over this TV, I scoped the input of the first video amp to see what is getting through the video IF section.

My pattern generator is set to color bars, which the TV displays as gray bars.



The top scope trace is the TV's video IF output. The bottom trace is direct from my pattern generator.



The signal looks pretty scrawny by the time it gets through the video IF chain; the burst signal is basically missing in action. Tell me if I'm wrong, but I'm taking this as a sign that the TV really does need realignment.

Phil Nelson