Enyweeny 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)