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All spark gaps should be rounded. The field enhancement at the edges of
a flat gap electrode will cause it to go into corona before the spark
forms, giving erratic operation. A radius of curvature less than about
25% of the gap spacing will go into corona first. Also, with wear the
electrodes will eventually become rounded, requiring adjustment during
the process. (Nature usually knows best.)
---Carl
On 1/18/2016 4:21 PM, Matthew Sweeney wrote:
I see a great deal of conflicting information regarding this, and I'm in
the process of making my tungsten spark gap for a small single NST
(12k/30ma) coil.
Should I be using tungsten rods with flat ends, or rounded? I've heard that
rounded ends are good for safety gaps but actual spark gaps should have
nice flattened ends. Is this true for static gaps and not just rotary gaps?
I will eventually make an RQ gap but starting off simple for now with a
basic one or two static rod gap design.
Any help appreciated!
Matt
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