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Registered Member #1822
Joined: Fri Nov 21 2008, 08:04PM
Location:
Posts: 300
I decided that I wanted to build a coil that was safe enough to operate at school and work. At home I can minimize the risk/damage potential of HV feedback on the powerline but, I cant at school or work. Would this:http://www.instructables.com/id/How-To-Build-
A-Vacuum-Tube-Tesla-Coil-VTTC/ be safe? I imagine that with an additional choke on the 120V side in addition to the 2.2KV MOT would "guarantee" the safety of other electronics on the same grid.
By safe what I mean is, is it far less dangerous than a SSTC? I have heard of many accidents that have happened with a SSTC that shorted out and arced to the powerline and destroyed everything that person holds near and dear.
Registered Member #2655
Joined: Wed Jan 27 2010, 04:09PM
Location: Czech Republic
Posts: 18
Well, both SSTC and VTTC are usually powered directly by rectified mains (VTTC sometimes have MOT (like the schematics you've posted) or voltage multplier attached, thus are more dangerous). So the contact with primary ciruit (and especially when you're not perfectly isolated from the ground, or it's hand-to-hand contact) is usually lethal. Usually, arc to the primary circuit kills almost every tesla coil so it's good habit to put one not closed turn of heavy gauge grounded wire few inches above the primary - which will prevent arcing from secondary to primary.
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
What exactly do you mean by "safe?" Because its not clear in your post what you mean. Words like "safe" and "dangerous" do not typically apply to equipment susceptibility. They are used when dealing with "human health hazards."
Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
Just another viewpoint about operating devices which have not been tested under categories for approval to sell, under the chain that starts with UL in the USA (for example) and passes down in laws at various levels: Do please consider people with biomedical electrics- pacemakers for example.
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Is this coil "safe"?
