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Your CRT sounds good, balance is important for good gray scale at different brightness settings.
Checking the tubes for shorts is a good idea. But keep the old ones around, some tube testers are super sensitive and sometimes a mild short is no big deal.
I quick smack on the table will often clear them up.
remove the safety cap that will be across the line before plugging it in. They are generally the white elmenco brand tubular caps sometimes they have two from the interlock to the chassis, sometimes just one across the interlock.
After the initial check out you will have to decide which camp you are in
A) replace all electrolytic caps with new
B) keep old caps in but use a fuse just after the B+
I would say that prob 80% of my sets from the 60's have the orig cans, but I would not bother to debate the pro or con as I can see why some would prefer to just replace. My only comment would be to at least baseline it with the caps in there (using the described procedure to avoid a dead short cap) then do the replacement. the reason being if you induce a problem during the work you can at least know it worked before so you can focus on just the work you have done.
On older sets I still do not automatically replace, but rather do a more extensive test on the caps by removing them from the circuit and then testing each section with an old school cap tester, often reform them in placed over a 24-36hr process using the cap testers variable power supply.
IF the cap comes back and test like a new one I reattach and use it.
The problem with older sets is they often have tube based power supplies so the variac does not provide the very low reforming voltages as the 5U4 is not conducting that low. newer set have SS diodes so you can get the very low startup voltages out of the B+.
Your set 'may" have a doubler from B+ so if that can is open (look for one with a cardboard sleeve) then the process is not going to work as well.
I generally check that one before doing anything. The doubler has to be in pretty good shape since its part of the B+ supply (not a filter).
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