Hi Bart,
I do have a terry filter on the NST and a safety spark gap across
the capacitor. I can see exactly what you mean on resonance. My power
supply is actually rated at just under 120 ma (115ma). So I think I am ok
on that.
As for my spark gap, I am using one that I bought a couple of years
ago, that I have been using on my 4" coil with great success (30" multiple
streamers). That coil is an 8Kv @ 60ma. I got the spark gap from
information unlimited. Here is a link:
http://www.amazing1.com/sparkgap.htm
It is the fan cooled double gap system on the top of the page. I figure I
would use this spark gap first before building one just for the new coil
(and put this one back in my 4" coil).
Best regards Jim C.