Millie Tess is a very small solid state teslacoil, designed to
run from a battery supply and to be as compact as possible,
Primary: 2T 1mm emameled copper wire.
Secondary: 2" tall 0.8" diameter, 400T on
overflow pipe 7/8" diameter. wound with 0.125mm Wire.
2" wooden toy lorry wheel covered in Aluminium foil.
At present Millie Tess is running from single IRF840
mosfet electronic drive, and its giving about 1.25" arcs to air with a
battery voltage of 76v
Circuit (Subject to change.)
First light, running from
streamers, its arcing, and it lights a flourescent tube , it must be a
Running from 12V it'l
light a flourecent tube from abut 5" away.
Loads of playing
I've moved the primary coil higher up the
primary, It now sits 1/3 of the way up the coil, this improved the
coupling and added about 1/3"
After speaking to Richie Burnett
about the experements he was doing into HF coils (see his
HF-SSTC) I made
Mosfet drive now uo to +/-
10V, It now runs cooler and I'm getting much
better sparks. I've made the mark width
longer as I can now risk more power into the
I've changed the circuit
a self resonant one (See current circuit above) so I don't get the de-tune when
anything gets near it.
Click the picture for a
short movie of the output of Milletess at a low break rate. I have since
improved the break rate to around 15BPS with the same size of
Millie Tess complete with driver and batteries..
Tesla Coils and High Voltage