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NPL

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Jay’s Tesla Coil

Jay’s Tesla Coil

The Megathron-Gigathor, (or so Tim has dubbed it). Is the largest tesla coil I have built. It is the culmination of a few years worth of parts collecting, and several more years worth of upgrades. It was completed in the 2011-2012.
was featured in a music video titled Cymatics, and continues to impress to this day.


Specs

The secondary self resonates around 60khz
The tank capacitor is 0.1uF
It is powered via a 10KVA pole transformer (run at 20KVA)
If I ever find the JAVA TC file, i will post the parameters. Its been a couple computer migrations and crashes since its creation.


Learn More about Variacs Here

Variacs

Construction

My brother an I winding the secondary, circa 2010-ish
Secondary Top, Showing baffles and wire connection
I jury rigged a motor to kept he coil in motion while the polyurethane dried
Corona Ring to protect the secondary and a feed thru insulator (which serves no purpose other than it looks cool)

It took my brother an I almost 6 hours to wind the secondary with #26 magnet wire. It has 4 coats of polyurethane.


Fabricating the 1st toroid
A fit Check

It was found pretty quickly that this toroid was way too small, the coil thirsted for more capacitance to drive. Thus a much larger one was made and the two were stacked. This stacked configuration works very well.


Primary Coil
This capacitor was acquired second hand, and actually custom made for Tesla coil use.

AC inductors from a large power supply

2 U cores stacked to make 1 E-I core

The center column mounted for winding, fiberglass L’s added to protect wire from sharp edges.
Mid-winding

A completed Inductor

3 Identical units were produced.

With a combination of taps and series parallel, I can ballast form 100A to 5A at 240V. These will soon be replaced by a single larger ballast.


Gap mounted in the Tesla Coil’s base

Gap prior to initial testing, with 1 electrode mounted
Showing electrode configuration
Initial Testing

The spark gap has 2 rotors on a common shaft, these are run in series, which aids in quenching. There are 24 stationary electrodes, enabling very high breakrates. This was originally intended to be a DC coil, where high breakrates would be ideal. But I have not yet run it in a DC configuration.


Pole transformers are excellent power supplies for Tesla coils. They are oil filled, resistance to lightning strikes, and can happily handle 160% their rated current load for a moderate period of time. I run this one at 200% capacity in 1 min intervals.

The whole coil sitting in my garage.
Yes those are sprite cans used as a spacer between the stacked toroids.

Runs circa 2017

Runs in 2018

A spool of #6 wire we were using as a ballast. It overheated and self destructed
ballast autopsy, note how all the wires are melted together

Runs Circa 2019

Back
  • NPL-Home
    • About Us
    • Accelerators
      • Betatrons
        • Plasma Betatron Coil Form: Design and Construction
        • Pulsed B-Dot Measurement
        • CW B-Dot Measurement
        • First Beam Attempts
      • Cyclotrons
        • 12-Inch Cyclotron
        • Axial Betatron Motion
        • Floating Wire Technique
        • 12-Inch Cyclotron Papers
      • DC Potential Drop
    • Experiments
      • Alpha Spark Detector
      • Jay’s Diffusion Cloud Chamber
      • Tim’s Wilson Cloud Chamber
      • Deuterated Target Preparation
      • Gamma-Gamma Coincidence
      • Measurement of excited Np237 half-life via the alpha-gamma coincidence method.
      • MUONS
        • Life & Times of a Muon
      • Neutrons
        • Neutron Diffusion Time Measurement
        • Neutron Induced Gamma Rays
        • Neutron Detection with He-3
      • Photography
        • AVCO Rotating Mirror
        • Dark Room
        • Fast Flash Photography
        • Rotating Drum Camera
        • Schlieren Photography
        • X-Rayted Photos
      • Rutherford Scattering
      • Thermoluminescence
    • History
      • The Kerst Collection
      • Heisenberg Cube
      • Koeth Collection – Consumer Products
      • Koeth Collection – Radiation Detection Instruments
      • Koeth Collection – Reactors & Weapons
      • Koeth Collection – Games & Collectables
    • High Voltage & Pulsed Power
      • Blue Thunder
      • Jacob’s Ladder
      • Krytrons
      • Marx Generator
      • Electric Watermelon
      • Tesla Coils
        • Jay’s Tesla Coil
        • Variacs
      • Quarter Crushing
    • Plasma
      • Fusors
        • FUSOR I
        • FUSOR II
        • Scott's Fusor
        • Fusor Simulations
      • The Mirror Machine
      • Pinch Machines
        • Linear Pinch
        • Toroidal Pinch
        • Pinching
    • Spectroscopy
      • Alpha Particle Spectroscopy
      • Gamma Ray Spectroscopy
        • HPGe Gamma Ray Spectroscopy Education
        • HPGe Systems
        • Cosmogenic Be-7
        • NAS Wildwood Mystery
        • Autunite
        • Trinitite
        • Tc-99m : Cardiac Stress Test
      • Software & Hardware
        • Refurbishment of LN2 Dewars
        • DIY Matlab MCA
        • Amateur Canberra Spectroscopy System
        • Antique MCA
        • NIM Modules
          • Canberra Nim Modules
          • ORTEC Nim Devices

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