[Amps] hi potting we go

[John Irwin]

I have heard it mentioned many times here about " hi potting " something before testing it in equipment etc.
 
I did a search and found hi pot testers have to to with arcing  .  and  they  seem to be industrial test  equipment.  Also that new ones are somewhat above my means.
 
so............  are old used ones available that the adverage experimenter can get cheap, like maybe 1946 war surplus?
 
and do I need one?  why can't we use something like a jacobs ladder arrangement to test
stuff for the arc over point. 
 
john kb9tc
 
 
 

		
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