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Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
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Posts: 3068
You can reduce EMI interference by ensuring there are no sensitive electronic devices on the mains line circuit you are running with, ensuring a good ground connection (dedicated ground) to the secondary, and ensuring any grounded strikes hit a grounded strike target grounded to the secondary ground. This keeps circulating currents in a close circuit. If you let the arcs strike a ceiling or wall, you don't know where the currents are circulating to return back to ground.
Registered Member #3395
Joined: Thu Nov 04 2010, 08:42AM
Location: Christchurch, New Zealand
Posts: 193
EasternVoltageResearch wrote ...
You can reduce EMI interference by ensuring there are no sensitive electronic devices on the mains line circuit you are running with, ensuring a good ground connection (dedicated ground) to the secondary, and ensuring any grounded strikes hit a grounded strike target grounded to the secondary ground. This keeps circulating currents in a close circuit. If you let the arcs strike a ceiling or wall, you don't know where the currents are circulating to return back to ground.
What I interpret from what you are saying it that I would have to completely unplug every single computer, laptop, phone and whatnot before operating the TC? Is this what you mean? My father and I are concerned for the electrical equipment in this house we have so I want to make absolutely sure I would be doing things correctly when I run it. So this means also means that I have directly connect the secondary to the physical earth and other potential metal objects that the streamers would strike?
Also realistically speaking it's only a ~1m (3 ft) or so coil so it wouldn't pose much of a problem. Still, don't wanna be taking my chances!
Another thing, I'm trying to calculate these things:
1. If the secondary diameter is 101.6mm (4"), then what would the proportional height be? 2. What should the diameter of my primary tubing be? I looked that this site here: and my mentor suggested "refrigeration tubing". These both seem to coordinate with each other so I would assume these values are correct or close to what I need. 3. What should the spacing be between the primary turns?
The reason I'm being really anal is because a little bit can mean a significant fluctuation in length needed to buy therefore = fluctuation in $$$. I had a go at this calculator here: and I got these results:
Inner Diameter(DI): 101.6 mm Number of turns(N): 11 Wire Diameter (W): 7 mm Turn spacing(S): 21 mm
Outer Diameter(Do): 717.6 mm Length of wire: 14.156 m Inductance(L): 39.751 uH
I have a hunch something's not right because 14m of tubing sounds ridiculously long. Is it just me and my distorted perspective on circumferences or is this really true? Could someone please clarify on this?
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Help needed - 1st SG Tesla coil
