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Read above post also. The most epic thing ever made. There are multiple types, such as Spark Gap Tesla Coils (SGTC), Solid State Tesla Coils (SSTC), Dual Resonant Solid State Tesla Coils(DRSSTC), Vacuum Tube Tesla Coils (VTTC), and High Frequency Solid State Tesla Coils (HFSSTC) , and much more. All Tesla Coils are transformers. They look like weird, thin, and shiny towers. Their size can vary, from the 3 inch tall desktop models, to the 7 feet tall garage models, to the 200 ft tall Lightning Lab models. I need to explain over couple of posts because there isn't enough space to contain all the awesomeness I am about to explain.
I love Tesla Coils. The longer, taller, and wider they are, the better. The more powerful the Tesla Coil, the better. I love that white stuff coming from that top. The more of it, the better.

I need a constant stream of water on my secondary coil when shining it. I need to put one coat of polyurethane on it, sand it down in the water, poly it again, and sand it down, about 10 times for a nice shine. It gets pretty cold outside so I just take it into the shower with me.
by Tesla Coil Girl December 23, 2011
3 1
An amazing device invented by the great Serbian-American scientist Nikola Tesla (the greatest, yet least known, scientist of our time )that uses a Telsa transformer to create real lightning bolts of astronomical voltage and frequency. In fact, there's a Tesla transformer in your CRT monitor or TV.
"Man, I've gotta test my Tesla Coil -- I've just gotta find a way to hijack 500kW of power from the substation down the street."
by John Cactus August 15, 2005
81 10
*cont* Their arcs can be purple, or bright white *edged with blue*, depending on the type, size, and current. 99.99 percent of people that build these for fun are boys, but there are the occasional girls, including yours truly. If you want more and more immediate info, ask the people on You need to make an account though and the mods do not dig one ounce of spam. The account is free though. They depict these in the movie "The Sorcerer's Apprentice." END :D
It's weird enough to say "I love Tesla Coils" really fast when you are a girl, but it is weirder when you hear a boy say that.
by Tesla Coil Girl December 23, 2011
6 1
*cont* They cannot get as big as DRSSTCs can. DRSSTCs are fucking dangerous but cool at the same time. These ones you NEED a faraday suit to touch the arcs or you will die. These things can be HUGE. They are very hard to build because both the primary and secondary coils have to be in resonance with each other. It is a committed build, because it is very expensive to build and even more expensive to buy. Never buy them. Always build them. It's cheaper that way. I spent about 200 dollars total on my SGTC, and for a smaller one online, it costs about 1200 dollars. DRSSTCs cost around 1000 dollars for a big one... to build from scratch. VTTCs are what it says... it has vacuum tubes. Vacuum tubes are archaic transistors. Transistors boost current. VTTCs are slightly more complicated than SSTCs, and their arcs are completely safe to touch. The arcs are still HOT though, but I'm talking electrically. HFSSTCs are high frequency, so they are also safe to touch to an extent. In all of these, I still suggest NOT touching the arcs at all, unless you have a desktop model of an SSTC. Those ones apparently "feel like how a 9V feels like on your tongue." That is the basics on Tesla Coils. Oh and also... Nikola Tesla invented it (DERP no duh). I forgot to mention. They can be over a million volts and various currents, and powered by multiple types of transformers.
I am going to go play with a million volts in my garage now using my tesla coil.
by Tesla Coil Girl December 23, 2011
3 1
*continued* It's simplest to build one that is one to two feet tall. The simplest one to build is a SGTC. The easiest way to build one is with a transformer, connected in parallel to a spark gap connected in parallel to a capacitor connected in parallel to the primary coil and a secondary coil of about 1200 turns of magnet wire placed inside the primary coil and a topload (it has to be of a shape with no edges, such as a sphere or a toroid--donut shaped) on the secondary. The secondary is then grounded to a copper pipe in the ground. The transformer needs to be at least 7500V 30mA. Yeah, DO NOT TRY IT AT HOME unless you know what you are doing or want to electrocute yourself. SGTCs cannot be audio modulated. It can be with an extra part but the noise would be drowned out by the spark gap. If you yell and can still hear yourself, you didn't make the spark gap right. To make sure you get the values right, you can go to JavaTC. It's a free online software for SGTC building. You can download it online. For more details on how to build one, buy or torrent "The Ultimate Construction Guide to Tesla Coils" or something.A slightly harder one that requires previous knowledge on electronics is a SSTC. They aren't as hard as DRSSTCs, but these ones are nice because the arcs are pretty safe to touch without a faraday suit and they are the fun, audio modulated ones.
I like them tesla coils huge.
by Tesla Coil Girl December 23, 2011
2 1