Quote:
Originally Posted by old_tv_nut
Interesting. I would have expected it and all the following sets with X/Z demods to have about the same chroma bandwidth.
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If you look at the chroma section in the Deluxe chroma demodulator design, the lower chroma sideband response extends to about 1MHz. This means that there should be a degree of quadrature crosstalk but providing more resolution in the I vector direction.
I recall a 1955 issue of the RCA Review I read decades ago, long before I had a chance to examine the CTC5 chassis. I recall they did a study allowing a degree of quadrature crosstalk and I wonder if the Deluxe chassis was an attempt to justify the addition chroma resolution at the expense of the crosstalk?
Interestingly, subsequent RCA sets stuck with the 500kHz chroma response.