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Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Hi guys.. as I promised here it is. The coil was buried under tons of other stuff I had to remove from the wardrobe. Coil has no proper spark gap or capacitor (used bottle caps) and never worked properly anyway. Beware of the helical primary wich covers about half of the secondary. I was unable to tune it as I planned so I used two large needles to try tapping the primary at other spots. Power supply was a 400VA OBIT.
At that time I knew so little about tesla coils. I was so innocent
Registered Member #964
Joined: Wed Aug 22 2007, 12:39AM
Location: Stockton, CA
Posts: 134
I think my first HV project was a Leyden jar charged by a PVC pipe and paper-towel. It made nice 1/2inch and sometimes 3/4inch sparks. It took a while to charge though. Now I'm working on Info-Unlimited's "Mini Tesla Lightning Machine" kit, but I think I'll end up finishing my camera-flash based ion gun like This one, but Hopefully mounted in a PVC pipe if I can find a right-sized piece. My PVC cutter doesn't work...
Registered Member #8
Joined: Thu Feb 02 2006, 04:34AM
Location: Harlowton, MT, United States
Posts: 214
When I was young I used to play with just a capacitor and diode on the end of a long stick, with a plug on it. You would plug it in, instantly charging the cap, then zap shit with it. From there I progressed to simple pulser things powered by descrete oscillator circuits (I was just learning basic electronics from a Forrest Mimms book), to charge caps similarly. I remember being so excited as the circuit made a whining sound of increasing frequency just like a defibrillator as it charged. It was like a stun gun, mounted inside an old shampoo bottle. From there I moved onto simple ignition coil drivers and stuff, for a jacobs ladder. I don't have any pics, so I won't count them. I made bigger jacobs ladders from MOT stacks too. My first serious HV project that required some real planning was a handheld reconnection coilgun. I made this long before I ever made a normal coilgun, or a tesla coil, or any of that. It was powered by a 540J defibrillator cap and charged from a separate MOT/voltage doubler charger. It fired 1 3/4" copper discs that would stick into wood. The handle was an old hand-saw handle and the trigger worked a couple levers that closed a spark gap. It was sort of scary and dangerous to operate, and very awkward since it was really heavy and all the weight was in front.
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Post you first HV project or thing
