EnyWeeny – Three small Classic Tesla coils

EnyWeeny Tess

Inspired by some of the really small coils on 4hv.org I decided to have another go at a small SGTC.

Spec:-
Secondary: About 350T of 0.07mm enamelled copper wire on a 5x20mm diameter acrylic former.
Primary: 4T 0.9mm enamelled copper wire.
Topload: Two Screw cups
Primary Cap: 4x1nF in series making a 4kv 250pF
Spark Gap: A single 10mm long gap made from 0.9mm wire, spaced about 0.7mm apart.
Power:  The PSU I made for Tiny Tess (
Diagram)

 

15mm Arc to a peice of 12mm copper tube.
Breakout to air from the edge of the two screw cups.
15mm arc to a compass point.

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.

A complete Teslathon on a disk.