WAG - check the beam finder switch. Maybe spray some contact cleaner in it and work it several 10's of times.
Regards
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On 11/24/2018 1:30 AM, yawrdanza@... wrote:
My recently acquired 465B Tektronix Oscilloscope has a problem I can't seem to track down. Both Traces are about half the length of the Screen Display and the Position Knob will only Bring the Traces Sweep Start to Center of the Display when turned full CCW. All Power Supply Voltages and Ripple are in Spec. I've pulled and Tested all Transistors on the Interface Circuit Board...all Tested good. All Published Voltages on the Horizontal Display Logic and A & B Sweep Generators Schematic are Spot On. Voltages on the Horizontal Amplifier Schematic however are all off somewhat from Published. Visually...everything looks normal except I can see one Resistor R4368 (3.74 K) in the Paraphase Amplifier has been replaced.
