The second version Tesla Coil 4-inch in diameter is driven by 4 microwave oven transformers (MOT’s) and puts out 4 foot sparks.
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Tesla Coil 4-Inch ver 2
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Tag Archives: Tesla
Red Alert
Red Alert Tesla coil replicated with a real one.
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Tesla Tree
A 63 second exposure shows a Tesla tree of sparks for Christmas . These come from a 8 foot metal rod which acts as a rotating breakout point that is progressively raised in a spiral so sparks extend from ground level up to a high of about 18 feet. Hoping my umbrella will protect me here.
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Longest Sparks
These are the longest sparks of 11 feet that I have had with this Tesla coil on domestic power. They only happen occasionally though. (something about the 3 longest sparks looks like a T. rex).
This is a run with everything maxed out. The spark gap was running at its optimum of 400 BPS and the series blower gap was on full. I had a total of 0.11 uF of tank capacitance. I tuned things by hand and with the tuner to 36 kHz. The variac was on full and no ballast. No idea what the current draw was. I imagine 30 A plus. I have a tape measure on the ground which was only really countable in the high res photos but was set at 11 feet. The secondary winding length is 52 inches which gives a ratio of spark to secondary length of 2.3 which is fair enough.
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Photo Date: September 9, 2007
Multilayer Tesla Coil
This is a multilayer Tesla Coil. It is a still uncompleted unusual Tesla project. It is a spark gap driven air cored resonant transformer, i.e. Tesla coil.
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Briefcase Tesla Coil
Tesla coil in a briefcase. This is my latest easily portable mini coil which gives 2-3 inch sparks. These are great fun and are generally safe due to the low power.
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Tesla on a Car
Tesla on a Car, 2005
Now this was a long time ago. For a bit of silliness, I put the mini Tesla coil above on my car.
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Xmas 2007
Merry Christmas! This is a single photo from a Nikon D70s digital camera and is a 91 second exposure of a real functioning Tesla coil and is the result of perhaps 50 hours of preparation. It is cropped but otherwise completely untouched. It is not, repeat not, photoshopped. It does however achieve the result using special effects which I will explain.
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My First Tesla Coil
My first Tesla coil using a neon sign transformer with a ferrite cored secondary giving 2 inch sparks. I developed this idea with an old transformer from a dumpster which in retrospect was an old unpotted NST (neon sign transformer). I used a single static gap with a 12 inch ferrite cored coil of 11 primary and 100 turns secondary giving 2 inch sparks with 26 small ceramic capacitors with 2 strings of 13 x 10 nF at 2.5 kV each. It ran nicely for about 20 years! This photo is a mock up with most of the original parts.
I developed this from my first “Tesla coil” discovery while doing a spark spectroscopy project. Years after I made it I heard that Tesla had beaten me to that discovery by quite a few years! This photo is a mock up with most of the original parts.
It now has new life as a Jacob’s ladder.
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Photo Date: Jan 19, 2003
Tesla Forum Events
The Tesla forum of Western Australia is one of the more active societies for the promotion of Tesla internationally.
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