Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

couple quick questions about tesla coil primary

Status
Not open for further replies.

lokeycmos

New Member
im heading out of state tomorrow to a family member to get some help making my primary for tesla coil. hopefully i can get my Q's answered by morning.

question 1: i have 50 feet of .25 inch copper tubing for my primary. what is the absolute minimum spacing between windings to prevent arcing across turns? what is average or optimum? what is maximum?

question 2: my secondary is 3.5 inches outside diameter. i read that the inside of the primary should be 2 inches bigger than the secondary. does that mean the inside of the primary should be 5.5 inches diameter or does that mean 2 inches additional on each side for a total inside diameter of 7.5 inches?

hopefully i can get an answer tonite yet! thank you in advance! :)
 
Last edited:

DerStrom8

Super Moderator
Hey lokey.

The spacing between turns really isn't too critical in the sense of arcing. Since it's all one piece of wire, there really isn't much potential difference between turns, so it's not likely it will arc between them at all. .25 inches to 3/8 inches should be about right. Like I said, though, it's not too critical.

That sounds about right. 5.5" should be good for the total "diameter" of the inside of the primary. Generally you should allow 3/4 to 1 inch between the side of the secondary and the first turn of the primary. This depends on the voltage at the primary, though. You don't want it to arc between the primary and secondary. 1 inch sounds good, though.

Good luck tomorrow!
Regards,
Der Strom
 
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top