Alan Sharp's Home Page.


My biggest coil achieving a 10 foot arc at the UK Teslathon in Corby (photo by - Richie Burnett)

Alan Sharp's

Tesla Coil Site

Please note projects described here use very high voltages and should only be attempted by experienced constructors who know the dangers

Contact Information - and about me


Conventional Coiling

Bride of Frankenstien coil

10 foot arcs


Including how to build the big one

Multi Mini Capacitors

Calculations and construction

My first conventional coil

A Simple Coil winder

Fairly Unique Stuff

The Dodecadonoid

An Unusual top load

Opera Nikola Tesla

Yes - we put on the opera

The Quadratic Mutation

4 interacting coils

Physics and Theology

Quantum Mechanics and Reality, Cosmology and the existence of God

My other site

I try to find the best free windows software for home users and churches plus help on putting up your own website and using multimedia

There are good free options for office, antivirus, firewalls, anti spyware, and web design.

More Tesla

First Ever UK Teslathon May 1998

Second UK Teslathon - May 99

Third UK Teslathon - May 2000

UK Teslathon 2001

Solid State Coils

OLTC Offline Tesla Coil

Experiments with resonance and output transformer

The Quadratic Mutation

My Second Solid State Coil

 Waiting for the next Lunatic project


Old Stuff

UK Component Sources

My old Solid State Coil

Rob's Circuit


Design and Theory

Helpful Hints

Output transformer design

Maths and theory

Wire tables UK / US / Metric  

Hot List lots of links

Useful chips and bits

My First Coil

This is my first coil, the top toroid has a diameter of about 18 inches. I have driven this coil with the Mosfet driver - giving about 6" sparks but in the photo above its being used as a conventional coil, the power supply is a 2000v, 1000w microwave transformer in series with a 5500v 300mA transformer, with about 0.09uF of capacitors. Spark gap is 4 pieces of 2" diameter copper pipe. It's not a great performer - but its as much spark as I can handle in my garage.

About Tesla Coils

Nikola Tesla (1856-1943) was a brilliant inventor, responsible in large measure for our modern system of A.C. mains power. He had a much grander idea though - the wireless distribution of electrical power using magnifying transmitters. His Tesla coils as well as being radio transmitters generate extremely high voltages and are often used for special effects in the movies.

A tesla coil is essentially an air cored transformer operating at its resonance frequency. The secondary coil, together with the capacitor formed between the output terminal and earth forms a tuned circuit if stimulated at its resonance frequency oscillations will build up until the voltage is high enough to breakdown the air and sparks break out.

Tesla used high voltage transformers, sparkgaps, and capacitors to energize his coils. Such are built by enthusiasts today and are capable of producing spark lengths of 3 feet or much, much more. There are problems though, with obtaining parts, with reliable and safe operation, and with the amount of interference generated. I decided for my first coil therefore to use modern electronics to produce the high frequency power with which to stimulate the coil.




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 My other site

I try to find the best free windows software for churches and individuals plus web site help.