On 22 Apr 2007 20:06:30 -0700, ve3ab
wrote:

Anyone have info on PACENT Condensers (Straight Line Frequency) Model
no 251B.
I have inherited 3 of them. Not too much information on the internet
about them that I have
found yet. This one I am looking at seems to be seized. I wonder when
they might have been
manufactured and what radios might have used them. I wonder how might
I go about lubricating
or unseizing it..if it is indeed seized.

It's possible that it is locked in place at a set capacitance. I think
that was usually done with a nut on the shaft.

Otherwise, I'd use some penetrating oil on it...

Dale