Jay,
You know by now to recap the piece as PM. This way, you know it is up to date and better quality condensers are installed. There are some resistors that should be increased in wattage.. Condoraudio has a great kit. There are some resistors not in his kit that should be there, yet. You can get the parts list if you want then order. It is best to mount the new condensers with a gap from the condenser to the board to allow for air flow and get a good solder joint on each side.
As for the crt being weak/borderline, you can increase the heater voltage 20-30% higher for some minutes to see if that helps. This step is done without the scope being on, only a supply that is higher than 6.3V. If you have or access to a crt checker that is good to professional quality, you can check it. Crt checkers have different heater voltage selections so the previous step can be done with a checker. If weak, replace with a known good one.
There are resistors in the focus circuit and a few on the high voltage board that are known to go bad to being overstressed. They are the ones from B+ to C and C to B on the collectors. Use 1W 1% types, get ones that are physically correct for 1W such as 4x10mm or so, to replace the 1/4W types. These resistors will go high/open making it look like poor focus or a weak crt. The 100meg 1/4W carbon on the high voltage board, replace! That will be way out of tolerance. Ohmite has a blue body radial type that will directly fit that is larger in wattage or you can get 1% 1/2W axial from Mouser.
IF yours has a separate battery, use a Tadiran 2.4A/hr axial type. This is heavier in capacity than original and is cheaper. I had the old Dallas chip removed and a FRAM put in to eliminate the Dallas chip and battery. I had someone else do the work and programming since I am not set up to do programming. It was worth the cost in my case.
Yes, replace the SMD condensers on the A5 board! Tantalums work well. You can increase the capacitance if you want. Keep the voltage the same. Make sure the A5 board does not have condenser electrolyte leakage from the originals.
The noisy fan can likely be quieted by removing it then oiling it. Peel the label back to get to the rubber disc then remove the disc then oil well.
Mark
