You can also get copper-tungsten rods, which machine very well, about 15% Cu and 85% W. I've been using the same set for 20 years in my 2 kW coil with occasional polishing.
---Carl On 1/18/2016 5:26 PM, msweeney23@xxxxxxxxx wrote:
Ok thanks, maybe ill just use screw on brass electrodes for now i dont have anything to round out tungsten. Sent from my HTC ----- Reply message ----- From: "Carl Noggle" <cn8@xxxxxxx> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> Subject: [TCML] Spark Gap Electrodes - Flat or Rounded Date: Mon, Jan 18, 2016 6:12 PM All spark gaps should be rounded. The field enhancement at the edges of a flat gap electrode will cause it to go into corona before the spark forms, giving erratic operation. A radius of curvature less than about 25% of the gap spacing will go into corona first. Also, with wear the electrodes will eventually become rounded, requiring adjustment during the process. (Nature usually knows best.) ---Carl On 1/18/2016 4:21 PM, Matthew Sweeney wrote:I see a great deal of conflicting information regarding this, and I'm in the process of making my tungsten spark gap for a small single NST (12k/30ma) coil. Should I be using tungsten rods with flat ends, or rounded? I've heard that rounded ends are good for safety gaps but actual spark gaps should have nice flattened ends. Is this true for static gaps and not just rotary gaps? I will eventually make an RQ gap but starting off simple for now with a basic one or two static rod gap design. Any help appreciated! Matt _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
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