[GreenKeys] OT: Non-TTY Cap Identification

[Cory Heisterkamp]

Sorry for the OT chatter, but if anyone has some advice to share, it'd
be this group. I'm trying to identify what type of capacitors these
are in the attached picture link so I can perform a replacement. The
values are 40uF each at several hundred volts. In small print on one
end is polarity identification with the word 'Positive" but no
tell-tale signs or construction that I would expect from a
conventional electrolytic. The associated rheostats are used in
setting the current to a pair of QK-707 magnetrons in a 1963 Raytheon
Radarange and I don't see any associated rectification which leads me
to believe this is an AC circuit. (there's one selenium for a
disassociated relay, and the heavy stuff is by way of 866A rectifiers)

http://www.radar58.com/misc/caps.jpg

Any ideas guys?

Thanks,
Cory Heisterkamp