Those look great TerraHertz! Really clean.
You called it David; ground side foil corroded in half
Oh man, this thing smells GREAT inside /sarc, so this is where that "old electronics" smell comes from, ugh.
Some illumination on nomenclature; upon reviewing the physical 5444 manual it turns out that
is what I have. 5443 refers to the acquisition frame and a 5443 mated to a D44 display
is a 5444. This is pretty cool as the 5444 is sort of the holy grail of the 5000 series, being 2 scopes in one tube a-la the 7844, and makes me VERY hopeful that the tube itself is not damaged. They were only offered in the 1976 catalog and are pretty uncommon.
The dave_k capacitor boards have arrived from OSH Park and look quite good so it is time for me to be ordering electrolytics. For years I have been pretty liberal in my capacitor replacement choices, figuring that if some is good more must be better, and I have had pretty good luck with that. Reading around here, however has given me pause as I see some are claiming that excessive voltage derating does not enhance reliability as the caps will quickly "reform" to the lower voltage and that higher voltage rated parts will have higher ESR to no benefit. While these arguments do make sense to me I am torn as I have become comfortable "overdoing" it in both capacitance and voltage rating.
Here is the relevant schematic with the caps in question pointed out
here are the specs per Tek
C800 170uF 275V (between +30 and +200V rails)
C848 10,000uF 12V (+5 - GND)
C875 7,500uF 25V (+20 - GND)
C876 7,500uF 25V (-20 - GND)
C930 5,000uF 50V (+38 - GND)
C932 3,000/5,000uF 50V (-38 -GND)
C932 is 5K in the 5444 and 3K in the 5440 (and all the other 5xxx) supplies
here is what is in my Mouser cart awaiting your critique
C800 220uF 315V ELXS3B1VSN221MP3
C848 18,000uF 16V EKMH160N183MQ40T
C875/6 10,000uF 35V EKMH350VNN103MR
C930/2 6,800uF 50V EKMH500VNN682MA3
Am I crazy? Is this too much?