Re: Overvolting an NST? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sat, 20 Oct 2007 13:02:45 EDT
From: Mddeming@xxxxxxx
To: tesla@xxxxxxxxxx
Subject: Re: Overvolting an NST? (fwd)

 
Hi Ben,
 
    Just like people, the higher the stress level, the  shorter the life 
expectancy. You can't tell how long it will be, just that  however long it lasts, 
it would have lasted longer with less stress. It's the  stress on the HV side 
that does the most damage, because the HV insulation  breaks down faster with 
age, and most surplus NST's are of unknown vintage. If  you feel you must push 
it, keep the runs short and resist the urge to open  the gap wider. It has 
been said, "Those who pay for transformers out  of their own pocket are more 
conservative with the next one they have to buy."  ;^))
 
YRMV,
 
Matt D.
 
 
In a message dated 10/19/07 8:08:35 P.M. Eastern Daylight Time,  
tesla@xxxxxxxxxx writes:


---------- Forwarded message ----------
Date: Sat, 20 Oct 2007  09:55:17 +1000
From: Ben Buxton <bb@xxxxxxxxxx>
To:  tesla@xxxxxxxxxx
Subject: Overvolting an NST?


How high can the  primary of an NST safely go before risking damage? I've
got a 240 to 15 kV  NST (60 Ma) and my Variac can give me up to 300 volts on
the primary. Can I  push it this far or would the tolerance be lower?

-- 
Ben Buxton -  Random Network Person








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