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Another thing occured to me - why don't I just put on a test pattern and look at the CRT cathode waveforms with an oscilloscope?
They should look very similar to the cathode waveforms shown in the Sams for my Motorola Quasar works in a drawer set, no? I suppose I could pull the back off a known good TV, like said Motorola, and see how it compares.
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