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I believe the only set which facilitated wideband color demodulation after the CTC2 was the CTC5 Deluxe. However the bandpass was vestigial sideband on both X and Z demodulation axes. This implies that there would be quadrature crosstalk. I haven't gotten around to checking or realigning the chroma channel on my CTC5. But I do detect a dark stripe between the green and magenta color bars which I assumed to be quadrature crosstalk.
It would be interesting to know the rationale behind RCA designers providing the asymmetrical +0.5/-1.5MHz chroma bandpass in the CTC5 deluxe. Curiously RCA stuck with +/- 0.5MHz on all subsequent designs up past the CTC20.
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09-21-2014, 05:27 PM
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