Power for Tek C53 camera?`
 

I just got a used Tektronix C53 scope camera and wanted to check it out.This
is a camera that gets its power from contacts near the scope screen .
Unfortunately I don't have such a scope handy ( I believe its a 7000 series)
and was hoping somebody could tell me what power it provides. This is for
the three contacts on the left side of the tube
thanks in advance
Bob
I