best practice to safely repair old oscilloscope with vacuum tube and crt

[crazyhog]

I brought an old timey Tektronix 564B storage oscilloscope. 

http://w140.com/tekwiki/wiki/564

Note that my B variant is built using semiconductors.  However, the vertical amplifier plugin, the time base plugin and the CRT are based on vacuum tubes.

I got it because of the very unusual  direct-view bistable storage CRT.  If you are curious, this is the technical write up of the technology.  It is fascinating!

http://www.radiomuseum.org/forum/tektronix_three_kinds_of_storage.html

I have a newbie question. 

I have no experience working with high voltage circuits.  In fact, I am learning EE on my own at the moment.  Before I hurt myself, I'd like to ask the board the following:

What are the recommended best practices to safely service and troubleshoot high voltage vacuum tube and CRT equipments?

Thanks!

[jh15]

#1 keep your left hand in your pocket. Learned that in my pre-teens and likely contributed decades later to saving my life in an industrial accident.

Isolation transformer for troubleshooting any line powered item on the bench. Do not isolate a scope Used for troubleshooting, ok for the scope under duress. Not sure if Dave mentioned that .

Learn a lot of the line referenced vs line isolated power supply stuff.

Look at concepts in Dave's video how not to blow up your oscilloscope. 

Have someone around. Teach them not to grab you while in process of being electrocuted. Kill power, if in reach, or whip off your belt and pull her away, etc. Unless you have a metal belt.

Reply back in a week here.

Don't panic, I learned all this early on in the 60's 9-10 yrs or so old.

[VK5RC]

Tektronix,  about the time of your scope,  wrote a great paper on "Troubleshooting your oscilloscope".  Certainly worth a read.  Gives good safety advice,  fault tracing algorithms and common faults.