Tektronix 575 Curve Tracer Restoration
We reformed the large electrolytic capacitors in the power supplies and inspected the unit for any damaged components. The three vibration isolators for the cooling fan were "perished" so we 3D printed substitute spacers. The fan was difficult to turn, but after some lubrication it rotated freely.
We connected the unit to AC power through a Variac, and slowly increased to AC voltage. Nothing caught on fire so we continued increasing the voltage. At about 65% of the 120VAC line voltage the fan started spinning. We eventually reached 100% of