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I got a waveform chart with my 1076 Manual. The vertical circuit is different between the 1076 and 1077B. In particular, the 1077B has a solid state stage to generate the vertical trigger pulse.
My problem is vertical instability. The raster on the CRT flickers in size which causes the test pattern on the TV under test to do likewise. I'm going to get a can of freeze spray today and will try that on the components in the vertical circuit.
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