[Amps] Hi Potting a 4-1000

[Kurt Lacko]

I have a 4-1000 tube of questionable origin.  I don't have an amplifier to test it and before asking someone to drop it in their amp I want to test as best I can first. My Hi Pot setup goes to 10KV.  What voltage should I be able to go to (grid/anode)and what would be an acceptable leakage (in micro amps)at that voltage?  Should this test be with or without energized filaments?  Anything else I should do or know about.  Thanks in advance,  Kurt...