RCA 21CT55 B8802897 is Alive!

[Tomcomm]

RCA started its CTV cost reduction with the first chassis after the CTC2B, namely the CTC4. A few comparisons should be noted:

.................................................. ....... CTC2B.................CTC4
Tube compliment:......................................3 7......................26
Stages of picture IF amplification:.................6.................. ......3
Stages of luminance processing:...................2................... .....2
Stages of chrominance processing:...............21...................... .10

I wrote the following in one of my earliest posts on this thread on March 23, 08:

I brought the 21CT55 into the house in 1964 after I got it working and ran it along side my Dad's old CTC4 he left me. Both had 21FBP22s so it was a good comparison of narrow BW color R-Y, B-Y vs. full BW color I,Q. The extension of full color into fine detail on the CTC2B was startling! Color persisted in fireworks until extinction that I never saw before. The CTC4 fireworks turned into white long before extinction. The CTC2B carried full color way into the shadows, the CTC4 went gray to black. I kept the CTC4 in the house for the kids but brought the CTC2B back to the garage workshop for further study.