If you go thru all this trouble producing a copper ribbon you run into another, and more serious, problem --- corona.
The edge of the ribbon is very sharp as compared to the well rounded surface of a 3/4 inch ID copper tubing. This effect produces a lot of corona sweeping up the coil and will start to deteriorate the coil especially in high performance coils that have a spark length = or greater than the sec coil length.
If you use a copper ribbon and shoot some B&W 30 sec time lapse photos you will see a large amount of nearly invisible (to the human eye) corona sweeping up the coil. Try the same with copper tubing and the effect is very minimal.
I did this experiment near 40 years ago with an old B&W camera, and never again use copper ribbon for any of my primary coils. Copper tubing is the best and certainly the most reliable solution.
Dr. Resonance Resonance Research Corp. www.resonanceresearch.com----- Original Message ----- From: "mark olson" <kc5gym@xxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> Sent: Thursday, December 06, 2007 5:04 AM Subject: Re: [TCML] Q,,question
At 10:40 PM 12/5/07 -0800, you wrote:Splitting is nothing,vertical dremal attached to a flat surface, What would be the size of this ribbobn,,,my math dont work that well? The inductance I can measure and compare to primary,,;)) Regards > > > > > > Sirs, > > > Would it be better to split a roll of 7/8" copper coil, and roll it > > > flat? > > > Seems more area would mean more "skin depth area"??? > > > Regards > > > j. > > > .the resulting ribbon made from a tube (assuming no waste) = pi * D where D is od of tube. so 7/8 = .875 hence .875(3.14)=2.747 or about 2 3/4 inch ribbonmarko _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
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