Hickok 533 Restoration - Inviting Feedback

[Geoff]

I'm getting ready to refurbish a Hickok 533 tube tester and am inviting any feedback from the forum. I will most likely replace the 83 rectifier with a solid state replacement since the original I have is bad. The 5Y3 tube I have is good so I will keep that.

I'd like to get some feedback from the more knowledgable forum members about what their experiences are refurbishing this particular model. What type of cleaner do you use on the rotary switches, push-buttons, etc.? Of particular interest I'd like to get some feedback on calibration. Any recommendations or feedback would be greatly appreciated.

- Geoff