Re: [TCML] first light disaster

[Ed Phillips <evp@xxxxxxxxxxx>]

I do not understand the significance of the gap across the NST, 
Therefore I did not incorporate this feature.

Thank you very much,

Marko"

   A safety gap would be an auxilliary spark gap connected either 
between the two HV terminals of the NST or two  separate gaps, one from 
each terminal to ground.  If the gaps are set to "just fire" with normal 
primary voltage on the transformer and no other load then they will keep 
the output voltage from ever rising above the normal open-circuit value, 
protecting both the transformer and any external capacitor load from 
excess voltage due to series resonance between the capacitor and the 
leakage reactance of the transformer.  Without such protection and 
depending on the actual leakage reactance and capacitive reactance the 
output voltage can rise to several times the normal voltage unless the 
insulation of the transformer or capacitor fails first.

Ed

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