Hi Simon,
An ascii diagram of the circuit might be helpful.
Because the gap fires without the cap yet doesn't with the cap may
indicate a connection issue or possibly a very low current NST. But,
you say from deepfriedneon calc's, so .016uF, I assume the NST was
suppose to be 40mA short circuit current rating (400VA NST)? If
true, then maybe there is a connection issue. Is the gap across the
NST before the cap or after? Should be before the cap.
Here's a schematic of my 4.5" spark gap coil which may be useful to
double check connections.
http://www.classictesla.com/photos/ba45/sch45.pdf
If your circuit appears ok to you, then it sounds like a current
issue with the NST.
Take care,
Bart
Simon Dodd wrote:
Hi Guys,
I went for first light this evening!! Unfortunately there was
nothing! My spark gap fires when there is no capacitor bank in
place but as soon as I put my MMC into the circuit and connect the
main parts of the coil, the spark gap stops firing :-( I am using
a 10Kv NST with a static spark gap and 16, 20Kv 1000pf capacitors
in parallel. These are from the calculations on deepfriedneon. The
spark gap will fire if the lead to the outer ring of the primary is
left unconnected.
Im sorry its not too clear, I can do a quick diagram if you want
more info.
Thanks for your help again
Simon
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