Help with building a tesla coil?
For the transformer, I'll be using an old negative ion generator thing that takes in 120VAC and outputs 7.5kv(pic). For the primary, I'll use old speaker wire in a cone shape (possibly using acrylic). For the secondary, I'll use 32- gauge magnet wire (pic). And for the spark gap, I'll use two bolts in a box, possibly with a computer fan cooling it. And for the capacitors, I'll just use an array of Leyden jars.
1. What diameter should the coil form be? I have some random white tubing which has an OD of 1/2 inches, 1/2 PVC piping (which actually has an OD of 7/8 inches), and 3/4 inch PVC piping. And is there a better alternative to these?
2. Should I use chokes on the input/output of my transformer? For those, I think I'll just wrap a bunch of wire around a pen.
3. Should I varnish it?
4. How powerful will the EM be from this thing? Exploding computers aren't that good.
If I have made any errrors, please tell me.