Enyweeny coils II

EnyWeeny Tess(es)

I thought that since I was making small coils I'd have a go at a few other types.

This one is a bi-polar coil.

Primary :  4.5T .9mm enamelled copper wire 8mm in diameter.
Secondary: 25mm of 400T 0.07mm enamelled copper wire on 5mm Former.
Primary Cap: 500pF

Secondary Spark: Gap 13mm.

Click Picture for a power on view.

And a Magnifier. 

Primary :  3.5T .9mm enamelled copper wire 8mm in diameter.
Secondary: 15mm of 150T 0.125mm enamelled copper wire on 5mm former.
Tertiary: 20mm of 350T 0.07mm enamelled copper wire on 5mm Former.
Primary Cap: 500pF

Not too happy about the power out of this coil, It is a bitch to tune, It some times gives 15mm arcs, and at other times it dosent and I dont know exactly why, probably something to do with the spark gap..

Click Picture for a power on view.