[old_tv_nut]

Thanks.
If i recall correctly, much later Zenith solid state sets used a simplified color bandpass that consisted mainly of a compensation circuit for the IF rolloff, with a not very sharp lower edge cutoff that allowed decent color resolution with some quadrature distortion.
Designs that try too hard to get max bandwidth with no quadrature distortion will suffer from ringing chroma transients, which can get worse than the quadrature crosstalk if the cutoff is really sharp.