04625 Analog Goodlyness A Classic CRO. The Hickok 517

Something different for today, no tubes is sight. I am checking out a 1979 CRO (Cathode Ray Oscilloscope) a Hickok 517 for a friend from my local Radio Club.
The 517 is a nice 15MHz two channel scope with all sorts of analog knobs and switches. A nice old workhorse CRO that would of been used in any number of industrial and service shops back in the day.
A good copy of the operating and service manual can be found here
archive.org/de...
Hopefully this does not turn into an epic.