CTC2B is everything the CTC2 is and more. Well, almost everything. There is one slight ripple in the CTC2's color demodulation scheme, but otherwise, the CTC2B is a CTC2 modified to drive a large 21-in. picture tube. A CTC2B chassis is the heart of the RCA model 21-CT-55, its first large-screen color television set.
Urban legend suggests that 20,000 21-CT-55's were manufactured. However, only a handful are known to have survived. For a little more information about a little seen set,