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The luminance delay line is a thick cable-like component mounted above the chassis. The schematic shows two components (L62, L64), described as "filament choke," between the filaments of the IF tubes. I haven't tried to sort things on the foil side to determine whether these squiggles are indeed the chokes. Filament choke is a new concept to me -- maybe intended to filter AC ripple to keep it out of the video signal?
Phil Nelson
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