Another Craigslist freebie! The Tektronix Oscilloscope seen here is a vacum-powered tube unit from probably the mid-60s. (click the photo to enlarge) I hope to pull various components off of this. I had the opportunity to spend a couple of hours rewiring the Variac I bought at the Dayton Hamvention last year. My Dad told me I may be able to rewire the coaxially mounted M5 variable transformers, from 3-phase 240vac to 120vac. I did this and the test I performed afterwards is in the video below.