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Registered Member #639
Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
You can touch the output of any coil. Because of the CW character of the discharges you won't feel much. That's because the frequency is way outside of what your nerves can detect. However there is harm being doing. The skin effect will make sure your blood vessels and nerves conduct almost all of the current. This can cause nerve damage and clothed blood vessels. So please don't try it, it's just not safe.
Registered Member #2808
Joined: Sat Apr 17 2010, 03:25AM
Location: Hong Kong
Posts: 11
When you touch an arc from a traditional DRSSTCs, it's hurt, but it's much less painful when touching a small VTTCs. Maybe it's some matter with BPS on on time?
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Arcstarter wrote ...
Avalanche wrote ...
because you have hands
Perfect!
Greg, look up skin effect.
Actually, the skin effect is merely a myth. Skin effect typically only applies to "very good" conductors, of which the human body is not. Bert Hickman of the TCML list did a very nice calculation which showed that the skin depth for a human body was about 2.3 meters.
Here is his post from the TCML.
Hi Terry and all,
Not a bad guess! Overall, humans have a bulk resistivity of about 400 ohm-cm, varying between about 150 ohm-cm for blood, 285 ohm-cm for parallel muscle fiber, to 2500 ohm-cm for fat. So, using 400 ohm-cm, skin depth at 200 kHz would be about 89 inches or about 2.3 meters. Unless you're large enough to merit your own zip code, skin effect is pretty much nonexistent for people and Tesla Coils.
-- Bert --
But as someone already said and hit it on the nail, the reason it "feels safe" is simply because the nerves do not react to electrical current at that frequency.
Registered Member #2899
Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255
With high-frequency, the electricity does not interact with the nervous system, and therefore can not be felled. You can only get burned. This effect is used in operation rooms, to cut the flesh from the patient and coagulate the vains, so there is little to no blood. To minimize the effects of muscle and neural stimulation, electro surgical equipment typically operates in the radio frequency (RF) range of 100 kHz to 5 MHz. The tension ranges from 100 to 400 V. (sorry for my English )
Registered Member #2566
Joined: Wed Dec 23 2009, 05:52PM
Location:
Posts: 147
Okay,how to construct a table top SGTC which doesn't give streamer jolts ? Except reducing top load size to minimum I don't know of any guidelines.Can I hear any tips from experienced coilers?Some small SGTCs (streamer lenght 5"-10") do bite while others simply don't.
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
dex wrote ...
Okay,how to construct a table top SGTC which doesn't give streamer jolts ? Except reducing top load size to minimum I don't know of any guidelines.Can I hear any tips from experienced coilers?Some small SGTCs (streamer lenght 5"-10") do bite while others simply don't.
Due to the disruptive nature of sgtc's, they will all bite you. Sure, some more than others.
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Touch the QCW or VTTC sparks
)
