Hello, I have recently acquired a Tektronix 7623 with 7B53A time base. I've made several repairs on the unit and have it almost fully functioning. The last major issue relates to the sweep speed and I'm not sure how to describe the symptom or what could cause it. Any sweep speed from 0.5ms/div and faster seems to work properly, but above that my sweep range is cut in half for each increment. So 1ms/div only displays on the left half of the crt, 2ms/div only displays in the left most edge of the screen and so on. I have taken some (quite blurry) pictures of the issue and posted them on
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if anyone is able to give me advice I would greatly appreciate it. I have the same issue with both vertical amps (which appear to be functioning properly). Thanks -Bob