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Re: [TCML] Dizziness and a headache

Thanks for all of the good replies. This year they let us come inside for the show. I had a fan underneath the coil in order to blow the ozone up into the 30' ceiling and I did not smell as much ozone as when I used to run it outside under a canopy. I will definitely make adjustments next year.
Best Regards.

On 6/8/2014 4:01 PM, Bert Hickman wrote:
Hi Jim,

It's not charged air. You were most likely feeling the symptoms of early ozone poisoning. Small coils tend to generate larger quantities of ozone, while larger (with hotter arcs and leaders) tend to produce more nitrogen oxides (NOx). And, neither are particularly good for you. Exposure to ozone can be even more hazardous for folks with lung diseases or other breathing problems.

Ozone is sneaky stuff. Although small amounts feel can smell like "fresh air", your sense of smell rapidly becomes less sensitive to it, and concentrations can build to levels that can easily cause medical symptoms with little warning. Ozone poisoning symptoms include eye, nose and throat irritation, feeling lightheaded, headaches (mild at first, then throbbing/painful migraine-like). Getting into an area with fresh air will usually cause these symptoms to slowly go away over tens of minutes to a few hours. Note that continued exposure can cause loss of consciousness, your lungs filling with fluid and, ultimately, death. There is evidence that some effects of ozone exposure may be cumulative.

Tesla Coils should be be operated with good ventilation or operated for short times with several minutes between runs to permit any toxic gases to dissipate. The half-life of ozone is about 2 minutes - it breaks down into harmless oxygen, so after 8 minutes, it's down to about 6% of its original level. However, many of the NOx gases can persist for considerably longer, so ventilation is always strongly suggested when operating coils for any extended periods. If this is not possible, you will need to leave the area for your own safety.

Please review the safety sheet for coiling here:


Jim wrote:

My son and I displayed our small Tesla Coil (9,000-volt, 60mah NST) at
the NC Makers Fair yesterday. Everything went fine but our space was
limited. We, as well as the viewers were less than 10 - feet from the
coil as it was running. Also, After we ran it for about 30-seconds I
showed the viewers an up-close look at the coil and gave them a quick
tutorial. This required me to squat down. Everytime that I got up after
the tutorial I would experience dizziness. My son was complaining about
a headache for about 7 - hours during the Fair. Could the charged air
surrounding the coil have caused my dizziness and my son's headache?

Thanks for the good advice,
The day was a real success thanks to the helpful people on this forum.


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