[Amps] ITT Jennings part numbers

[R.Measures]

>I have a vacuum variable which is marked 7-1000 pf, but has no voltage
>rating.  The ITT Jennings part number is CVCJ-1000-0105.  Can the
>voltage rating be deduced from the part number?  Googled, but no luck.
>
The DC V rating is either 3kV or 5kV.  Normally, a suffix of 3S or 5S  is 
used to designate which is which.  I would measure the DC breakdown V 
with a high-pot tester to determine which one it is, and whether or not 
it still has a vacuum..

cheers, Bill - and good luck.  With vac caps, you need some.