I'm working my way through a Tektronix 4006 terminal purchased of eBay right
now. First stage is the low voltage power supplies, and I noticed right away
that one of the multi-stage electrolytic filter caps there was running quite
hot (this was with downstream electronics isolated, and a 40 ohm dummy load on
the +20V supply per recommendation in the service manual.)
The cap in question is a multi-section Mallory can, 150@400 / 150@250, used to
filter the +185 and +320 unregulated supplies. It is C395 A/B on the
schematics, Tek part 290-0549-00, Mallory part 68D20193.
This terminal is so beautifully engineered inside that it would be a real shame
to replace this with some sort of ugly bodge. Any part-sourcing gurus out
there able to steer me in a good direction here? I have found the part listed
in the various online NSN aerospace cross-referencing sites, but haven't
bothered to ask for a quote from any -- I'm guessing cynically that "RFQ" +
"Aero..." = 5 zillion dollars for one piece... :-) Has anybody here used one
of these sites successfully?
cheers,
--FritzM.
