Step 1: DANGER
Also, I don't take any responsibility for you hurting yourself.
This isn't to say that you shouldn't get into high voltage though, its just that if you are planning for this to be your first HV project, its a little to involved. Instead, try out a nice microwave oven transformer, and be safe!
Step 2: Gather the Materials
- A length of 1.5" PVC (the longer the better)
- About 300 feet of 24 AWG copper enameled wire
- 1.5" PVC screw-thing (see picture)
- 1.5" metal floor flange with threads
- Spray on enamel
- Circular, smooth metallic object for the discharge terminal
- Various pieces of wood
- Long bolts, nuts, and washers
- About 10 feet of thin copper tubing
- 6 Glass bottles (Snapple bottles work really well)
- Table Salt
- Oil (I used canola. Mineral oil (horse laxative) it preferable as it doesn't mold, but I didn't have any.)
- Lots of aluminum foil
Step 3: Wind the Secondary
- I built a rig for winding my coil that consisted of a microwave turntable motor (3 RPM) and a ball bearing.
- Use a small block of wood with a notch in it to straighten the wire and tighten the coil.
Step 4: Prepare the Bases and Wind the Primary
Optional was the addition of 2 supports that I zip-tied the primary to.
Forgot to add how to make the spark gap! It is just two bolts in a open-air wooden box, and they are adjustable for tuning, etc. See the last image...
Step 5: Build the Capacitors
Optional: to keep the bottles in order, make or find a metal crate for them
As Glenn781 pointed out below, 6 Snapple bottles with a 15kV 30mA NST can be deadly! If you are using a NST like his, use 8-12 bottles, not 6!
Step 6: Connect Everything
My Coil's Specs
- 599 Wraps on secondary
- 6.5 Wraps on primary
Step 7: Start It Up!
Step 8: For the Future...
But for now, I'd like to admire other coilers hard work!