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The Conracs had very good DC restoration and regulation - and when looking at the tube count, you have to remember they had extra sweep functions for offsetting the V or H timing (or both), and expanding the V interval so you could see if the sync pulses were correct on your signal ("pulse-cross" setting). A real monitor would also allow you to turn the color notch filter off when the color was turned off, and had a phase-compensated peaking ("aperture compensation") control using a tapped delay line. No comb filter in these early beasts, though, and IIRC no I/Q demods either - just very good R-Y, B-Y.
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