Electret progress update

I have my hv diodes - 20kv 0.1a, small oven, ignition coil setup, and now Carnauba and beeswax.. Just trying to find white rosin. Might head off into city next payday and find specialist music store..

neon triggered scr cap dump circuit?

vacuum pump from tyre pump

I cut a section of tv aerial to fit over suction hole in top of piston :-)

purple flash on modified joule thief circuit

The larger the flat surface area before the neon (doesn't count if you make it into a tube) and the more wire after the neon (in a straight line), the better the pickup.