[Amps] Henry 2K Classic X

[G3rzp@aol.com]

In a message dated 19/03/2005 11:25:30 GMT Standard Time, r at somis.org  writes:

How do  real high potential 
testers manage to get a microphone inside vacuum  capacitors and vacuum 
relays?



Once corona (or any other breakdown)starts, there's a current. Sample that  
current and use an audio amplifier! Feed the amplified signal to a scope when  
you're testing with AC and you can see the breakdown duration etc.
 
gets very sophisticated - I saw it many years ago when we did an industrial  
visit to a switchgear and transformer manufacturer.  I suspect that these  
days, industrial visits aren't allowed for 'health and safety' reasons. Sad,  
because they could be very educational.
 
73
 
Peter G3RZP