[Amps] Vacuum relays a question

[K6KWQ@aol.com]

I have some small vacuum relays by Kilovac. They are rated at 3500 volts 15 
amps.
What's the catch? You could not say that these are good for 52KW could you? 
Are they good for antenna relays? At VHF, UHF? They seem pretty small  for 
the above current and voltage ratings. Does it all have to do with the 
vacuum? Please excuse my spelling and apostrephes.


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