http://koti.mbnet.fi/kizmo/tesla1/galleria/putki.jpg ) I dont know exactly what happened but i think that had something to do with too high..." />
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4hv.org :: Forums :: Tesla Coils
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Things to check before light

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Kizmo
Mon Dec 22 2008, 11:42PM Print
Kizmo Registered Member #599 Joined: Thu Mar 22 2007, 07:40PM
Location: Northern Finland, Rovaniemi
Posts: 624
Hi!

Tomorrow i will test my 8" coil again and i have few questions. It has repaired secondary (damage -> Link2 ) I dont know exactly what happened but i think that had something to do with too high coupling and being slightly out of tune. (AND small bit of user error wink)

I got it repaired pretty well but i think it wont be as good as new coil so this time i want to make sure it wont be too stressed.

Things that came in my mind:

- Carefull tuning with o-scope and signal generator
- Good RF ground (i have dug several copper rods in ground around my test site)
- Starting with very mild coupling

If sec. diameter is 200mm what would be safe inner diameter for primary?
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MRacerxdl
Tue Dec 23 2008, 12:14AM
MRacerxdl Registered Member #989 Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
Hmm, I think 230-240mm or so it will be fine, I was have a similar problem at one of my coils, some turns suddenly gets red and vaporized when running the coil. But I dont know why it gets like that =/
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