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Thought I would pass one several things I learned while working on the 1077B.
Bean Current. B&K specifies 75 uA. Mine was setting at slightly over 100 uA. Going to 75 uA improved the spot size and sharpened things up somewhat.
Sync Level. I never could get the display on the TV set to have enough brightness or contrast like I could with my old 1076. B&K specifies 0.7 V p-p for the 1077B and 0.5 V p-p for the 1076. I settled on the 0.5 V setting and now have good brightness and contrast.
Working on the vertical circuitry. If you are working on the vertical circuitry and need to keep the CRT from coming on, just use a clip lead and connect it across the CRT's filament. Both ends of the CRT's filament are readily accessible underneath the chassis. No bright thin horizontal line on the CRT.
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