Quote:
Originally Posted by old_tv_nut
Can you post the chroma bandpass alignment procedure/waveform for the deluxe chassis? Do they show the final response for R-Y and B-Y? It might help make a guess. - can only find the super alignment online.
A dark stripe does not indicate quadrature distortion, only reduced bandwidth. Quadrature distortion would show as a residual color during the transition, with the edges of the green and magenta bars discolored one way or another.
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I haven't a scanner, but looking at the RCA T-6 Service Notes for the CTC5 Deluxe, the chroma bandpass is from 2.28MHz to 4.1MHz. This means that the lower vestige is 3.58-2.28=1.3MHz. The CTC5 Deluxe employs two stages of bandpass amplification which I would imagine furnishes the extra gain for the wider bandpass. CTC7 onward had only one bandpass amplifier stage.
And I stand corrected. The band between the green and magenta was not black but an orangey hue if I recall. But I agree: it would not be black.
I'll post the CTC5 notes tomorrow.