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Tesla Coils


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All new TESLA COIL and JACOB’S LADDER STORE

Your source of Museum quality displays producing 12 foot sparks to products for the researcher, student and hobbyist.
We will be continually adding new items as we have hundreds more

You will find parts, subassemblies, complete kits and partial kits. You can see video on our ready to use Tesla coils ranging from desk top size to Museum quality display type. Our stock includes materials for all size coils, wound and sealed secondary coils, conventional spark gap coils, vacuum tube and solid-state coils with music options and many other features and special effects. You will also find Jacob’s ladders ranging from small to museum size as kits parts and plans.

Please browse around and check out pricing on our inventory. If you have any questions you may contact us by email at techsupport@amazing1.com


Capacitors/Rectifiors/Diodes by subcategory:
Large Tesla Coils
Smaller Tesla Coils
Toroids
Neon Transformers
Spark Gaps
Tesla Coil Capacitors
Secondary Coils
Other Tesla Parts




Click on a picture to jump to the item description, below.
mtc3
MTC3
 
btc10
BTC10
 
tlite10
TLITE10
 
  tcl50
TCL50
 
btc30
BTC30
 
btc40
BTC40
 
btc50
BTC50
 
vactesla
VACTESLA10
 
quasar60
QUASAR60
(solid-state)
btc70
BTC70
 

The spectacular and highly visible effect produced by tesla coils has been the subject of controversy for years. The high frequency high voltage energy produced possesses qualities unlike conventional electricity. It defies most insulation material, transmits energy without wires, produces heat, light and noise yet harmlessly passes through human tissue with virtually no feeling or shocking effects. Much research, money and effort was dedicated to actual construction of similar large devices capable of producing 200 foot lightning bolts and illuminating light bulbs 25 miles away. Nikola Tesla was the originator of this research and was often thought of as a charlatan. As progress was made in the electrical sciences it was soon realized that he was indeed correct, and responsible for many advances in the development of energy production. He has now been credited with these advances and original techniques. His main theory, however, is still very much in question and many dedicated groups are hopeful in obtaining some break that will resurrect it. The tesla coil is the basis for this research and never ceases to amaze all those who come in contact with its highly visual and audible effects.

 

Table Top Tesla Coil
Easy-To-Build
250,000 Volts!
capacitor
capacitor capacitor

capacitor capacitor capacitor


Produces 8-12" Visible Lightning-Like Discharges. Both the kit and assembled unit include an 8" toroid and wound coil (so you don't have to do any winding). Excellent Science Project. Fully adjustable.

This is a spark driven Tesla coil generating highly visual and audible sparks into open air without a return contact.

The unit operates from a standard wall outlet requiring less than two amps. The transformer is current limited to 60 ma and center point grounded.

The tesla coil is easily tabletop operable and is a two-level assembly consisting of a top and bottom section. The top supports the vertical mounted secondary output coil and the flat Archimedean spiraled primary along with tunable clip lead. The bottom supports the transformer, capacitor and spark gap assembly. A metal control panel is connected to earth ground along with the secondary return minimizing any dangerous shock hazards.

The spark gap uses two pure tungsten electrodes rarely requiring cleaning or dressing. Hardware is all brass where required, with the primary coil being a hybrid between copper tubing and a heavy insulated wire.

The kit version contains all parts to complete the unit, including a pre-wound and fully prepped secondary coil, and an 8 x 2" toroidal terminal which greatly adds to the performance and overall appearance of the completed system.

Assembly: The assembled version is fully built and ready to use; the kit requires wiring and soldering with some basic mechanical assembly (the secondary coil does not need to be fabricated as this comes fully wound and assembled).

Applications: Use for a science project, special effects prop, research of high frequency electricity, and much more. Some audiophiles claim that running the tesla coil's output through their component wires (unattached to their equipment, of course!) for about a minute helps to "open up" the sound quality of their equipment; whether this is a real or perceived effect is unknown, but this is some of the feedback we've gotten from our audiophile customers.

BTC30 Instructions & Applications

  • Transmit wireless energy
  • Materials glow, disintegrate, burn
  • ION motors, induction fields
  • Corona and St. Elmo's Fire
  • Amazing and spectacular special effects
  • Size: 23" H x 12" sq. base
  • Weight: 25 lbs
See our Page 2 for parts and accessories.
- Assembled & Tested with 8" Toroid ... $584.95
- Kit/Plans with 8" Toroid ... $484.95
- Paper Plans ... $15.00
- Downloadable Plans ... $7.00
- Optional 220V Stepdown Transformer for overseas customers ... $69.95

 

Medium Power Table Top Tesla Coil

18 TO 30" DISCHARGES!

500,000 Volts!

Intended for Special Display Experiments -
Produces Intense Discharges!

btc40
btc40 btc40 btc40
btc40 btc40

 

Power enough for most R&D experiments. Kit and assembled units include wound coil (so you don't have to do the winding), multi-section spark gap, and 12" toroid terminal. Individual parts also available.

This is a spark driven Tesla coil generating very visual and audible sparks into open air without a return contact. It operates from a standard wall outlet requiring less than six amps.

This Tesla coil can be operated on a tabletop. It is built as a two-level assembly consisting of a top and bottom section. The top supports the vertical mounted secondary output coil and the flat Archimedean spiraled primary along with a tunable clip lead. The bottom supports the transformers, capacitor and spark gap assembly attached by machine screws and nuts.

A metal control panel is connected to earth ground along with the secondary output coil return, reducing line voltage shock hazards. The spark gap is air-cooled with a high output muffin fan and uses three pure tungsten electrodes rarely requiring cleaning or dressing. Hardware is all brass where required with the primary coil being all copper tubing.

The kit contains a pre-wound and fully prepared secondary coil and all parts to complete the unit, including a 12 x 3 inch toroidal terminal which greatly adds to the performance and overall appearance of the completed system.

Our BTC40 used in laser guiding of HV discharge, photo complements of the
Optical Society of America (© 2012 OSA, Optics Express Vol. 20 No. 12):

Assembly: The assembled version is fully built and ready to use; the kit requires wiring and soldering with some basic mechanical assembly (the secondary coil does not need to be fabricated as this comes fully wound and assembled).

Applications: Use as a science project, museum display, special effects prop, and for electrical research of high frequency electricity. Some audiophiles claim that running the tesla coil's output through their component wires (unattached to their equipment, of course!) for about a minute helps to "open up" the sound quality of their equipment; whether this is a real or perceived effect is unknown, but this is some of the feedback we've gotten from our audiophile customers.

BTC40 Instructions & Applications

  • Air-Cooled Tungsten Spark Gap
  • Choice of 115/220 Operation
  • Parts Individually Available
  • Size: 30" H x 16" sq. base
  • Weight: 45 lbs

Attention Museums!  This Tesla coil is built using transparent polycarbonate to reveal the inner wiring. This is truly a spectacular looking device!

See our Page 2 for parts and accessories.
- Assembled with 12" Toroid ... normally $1659.95 on sale $1295.00
- Kit/Plans with 12" Toroid ... normally $1259.95 on sale $995.00
- Paper Plans ... $20.00
- Downloadable Plans ... $10.00
- Optional 220V 1500W Stepdown Transformer for overseas customers ... $99.95

 

High Power Table Top Tesla Coil

Up to 4-foot Discharges!

A Spectacular Electrical Arc Display!

btc50
btc50 capacitor btc50

Power enough for most R&D experiments. Kit and assembled units include wound coil (so you don't have to do the winding), multi-section spark gap, and large 18" toroid terminal. Individual parts also available.

With twice the output power of the BTC40, this classic core & coil design throws long sparks of electricity into the air, and is still able to run from a standard wall outlet.

This is a larger and heavier Tesla coil than our BTC40 that requires 2 people to move, but is still small enough to be operated on a tabletop (although it will pretty much dominate the table).

A heavy piece of wire is connected to the front panel of the unit for grounding to a dedicated lead if necessary. A grounded strike ring prevents the long electrical arcs produced by this coil from arcing to some of the sensitive electronic parts and pieces. Bypass capacitors are placed across both the neutral in the hot AC line and connected to the third wire grounded lead.

The spark gap is air-cooled with a high output muffin fan and uses three 2 x 3/8" pure tungsten electrodes that rarely requiring cleaning or dressing. The tungsten electrodes are easily adjusted to help vary the length of the output discharge. This can be used to increase or decrease the recommended time of running your coil.

Hardware is all brass where required with the primary coil being all copper tubing.

The kit contains a pre-wound and fully prepared secondary coil and all parts to complete the unit, including an 18 x 5 inch toroidal terminal which greatly adds to the performance and overall appearance of the completed system.

All our Core & Coil Tesla Coils use special built "beefed up" capacitors intended for optimum and long term reliable performance. They also use transformers with special "beefed up" internal secondary HF chokes wound to block damaging voltage transients. This eliminates breakdown when used with the proper value external resistors (included).

Assembly: The assembled version is fully built and ready to use; the kit requires wiring and soldering with some basic mechanical assembly (the secondary coil does not need to be fabricated as this comes fully wound and assembled).

Applications: Use as an advanced science project, museum display, special effects prop, and research (such as the electrical confinement beaming of high frequency electricity for weapons), and other uses.

BTC50 Instructions

  • Air-Cooled Tungsten Spark Gap
  • Choice of 115/220 Operation
  • Parts Individually Available
  • Size: 34" H x 16" sq. base
  • Weight: 70 lbs
         

Attention Museums!  This Tesla coil is built using transparent polycarbonate to reveal the inner wiring. This is truly a spectacular looking device!

See our Page 2 for parts and accessories.


- Assembled with 18" Toroid ... normally $2499.95 on sale $1995.00
- Kit (includes premade secondary coil and 18" toroid) ... normally $2199.95 on sale $1895.00
- Paper Plans ... $20.00
- Downloadable Plans ... $10.00
- Optional 220V 1500W Stepdown Transformer for overseas customers ... $99.95

 

High Power Vacuum Tube Tesla Coil
vactesla10
vactesla10 vactesla10
vactesla10 vactesla10
vactesla10 vactesla10

Excellent for Demonstrating Wireless Power Transmission

These spectacular display devices produce arcs and sparks quite unlike the damped spark gap driven Tesla coils. Operation does not require a noisy spark gap that produces copious amounts of RFI radio frequency interference, but operates efficiently at the quarter wave frequency of the secondary coil.

Vacuum tubes, while large and requiring filament power, do offer robust and forgiving operation and are intended as a good starter approach to solid state Tesla coils. This approach is far less temperamental than the solid state MOSFET or IGBT drivers. However once these devices are debugged and tweaked one can obtain some excellent results. Our lab FET coil generates over 6 foot sparks using only 3 kilowatts. (The fully assembled 1KW tesla coil sold here produces up to 18-24" sparks.)

The output of the oscillator is relatively closely coupled to the secondary coil designed for high Q performance and self resonant to the 1/4 wave of the oscillator frequency. The voltage distribution is now that of a quarter section with a current node at these base and voltage node at the top. Input power to the coil is raw unrectified AC at 3000 volts rms with a current of 0.5 amps. Peak voltage is over 4000 volts and is supplied by a conventional plate transformer being fed by a voltage adjustable variac for power output control.

(We also have built coils using 304TH, 450TH and parallel 2500TH's with a full 5000 watts of plate dissipation. This coil produced spectacular hot flaming arcs up to 8 feet with 8 kw input.)

A pulse signal is also shown that controls the grid of the tube allowing a wide range of spark texture variation by changing the duty cycle and frequency.

For those building this from scratch, the circuit of the vacuum tube device is a high powered Hartley radio frequency oscillator tuned to the resonant frequency of the secondary coil. The circuit uses a medium powered 833A triode transmitting tube that inherently has a high grid to plate capacitance and is readily available. The plate section of the coil is wound with 1/4 inch copper tubing. The grid feed back coil is wound with #16 litz wire. The secondary is wound with #24 litz wire on a properly prepped plastic form.
  • Quieter than standard tesla coils
  • Continuous-wave output gives stronger energy field
  • Parts Individually Available
  • Size: 36" height x 16" sq. base
  • Weight: 45 lbs

We can custom build vacuum tube or transistorized Tesla coils up to 5 kw. The transistorized coils can be modulated to sounds, music, etc. and are great for museums or just as a spectacular high-tech gadget. Please Email us for inquiries.


See our Page 2 for parts and accessories.

- Fully Assembled 1kW Vacuum Tube Tesla Coil with 12" Toroid ... $3750.00
- Vacuum Tube Tesla Coil Plans ... $20.00
- Vacuum Tube Tesla Coil Downloadable Plans ... $10.00

 

Solid State Tesla Coil
quasar60

quasar60 quasar60 quasar60
quasar60 quasar60 quasar60
quasar60 quasar60 quasar60

Controllable Oscillation Allows Musical "Notes" to be Played Through The Tesla Coil's Electrical Discharge

This solid state tesla coil provides a spectacular display of lightning-like discharges for museums, attention-getting advertising, special events, and of course high-voltage high-frequency research. But the most fascinating feature is the ability to play music. By rapidly modulating the output frequency, "notes" can be played by the resonance of the electrical discharge, and when a keyboard is plugged in and passed through the proper controlling circuitry (both of which are included with this tesla coil), the tesla coil becomes a musical instrument that uses lightning bolts to make notes.

The solid state tesla coil is sold as a "minimal kit" requiring the purchaser to assemble the device in order to make it operable. This is a simple mechanical assembly, but necessary to stay in compliance with FCC regulations which allow any entity (business or individual) to assemble up to 3 radio transmitters without requiring a license.

It is suggested to not operate this solid state tesla coil in densly-populated environments, such as cities, for purposes of radio interference -- or if this device is to be operated in such an environment, it is suggested that a Faraday Cage be built to block electromagnetic emissions (plans on building a Faraday Cage are included with all versions of the solid state tesla coils). Also, operating this tesla coil inside a metal building, such as a steel garage, will help to reduce or eliminate RF emissions.

Unlike the transformers used in standard core-and-coil designs, this advanced device poses a less-lethal electrical hazard -- which is one of the attractive features of solid state tesla coils. (However, anything that plugs into 115VAC wall power poses an electrical hazard, and precautions for working with high voltage items should be observed.)

Includes all components: the 20" toroid, wound secondary and primary coils, base with full bridge multiplier and tank circuit, controller box, interrupter box (which includes audio input), a keyboard and audio cable, power supply, variac (runs on 115VAC wall power), and all required cables and wires. The audio input from the interrupter to the controller is by fiber optic, so electronic devices may be safely be plugged into the interrupter and regulate the input signal without any feedback risk to the electronic device (such as computer, mp3 player, musical instrument, microphone, etc.).


See our Page 2 for parts and accessories.


- "Minimal Kit" Solid State Tesla Coil with 20" Toroid ... $5500.00
- Paper Plans ... $20.00
- Downloadable Plans ... $10.00

 

High Power Large Tesla Coil

8 To 10' Discharges!
2,000,000 Volt Output Equivalency

Large Tesla Coil

Large Tesla Coil Large Tesla Coil Large Tesla Coil Large Tesla Coil
Large Tesla Coil Large Tesla Coil Large Tesla Coil Large Tesla Coil
Large Tesla Coil Large Tesla Coil Large Tesla Coil Large Tesla Coil

Well-suited for museum displays, university research, laboratory studies, and the advanced hobbyist familiar with the use of high voltage.

The complete BTC70 comes ready-to-use with all components: the power supply with transformers, chokes, and 20 feet of HV cable (to operate the coil from a safe distance); the base unit with capacitors and spark gaps; the fully-wound secondary coil; and the toroid. The coil stands over 6-½ feet high, and requires a dedicated 220vac 50amp single-phase 3-plug "utility" socket (not a standard 115V wall outlet like our other coils).

  • Advanced Project for High Voltage Research
  • Throws Electrical Discharges out to over 10 Feet
  • Spectacular Display of Natures Fireworks
  • Materials Testing
  • Air-Blown 4-Point Heavy 3/8" Tungsten Spark Gap
  • Size: 6.5' Height x 24" Square base
  • Power: 220vac 50amp single-phase

The plans contain 56 pages, color photos, engineering drawings, schematics, a parts list, etc., so this coil can be built for less than the Assembled price (but with several days of work required). All specialized parts are available through us and are fully described on the parts list.

Customer Photo:

See our Page 2 for parts and accessories.

- Large Tesla Coil, Assembled and Ready to Use ... normally $9500.00 on sale $7900.00
- Paper Plans ... $20.00
- Downloadable Plans ... $10.00

 

Micro Mini Mite Tesla Coil
micro mini mite tesla coil Lights Up A 4 Ft Florescent Tube
Without Contact!
  • Radiated Power Experiments
  • Gas Discharge Power Source
  • Electrical Pyrotechnics
  • Jacob's Ladder
  • Generate Ozone
  • Kirlian Photography
  • Plasma Etching
  • Optional HV DC Multiplier
  • Weight: 6.0 oz (+ 2lb adapter)
  • Height: 11" high x 3" square base

Includes a 12 volt 1.5amp step down transformer (wall adapter) for 115 vac operation. Output voltage is between 5000-7000 volts peak- to-peak at about 40kHz. This kit can be modified to perform a number of other projects and experiments with the optional High Voltage Retrofit kit (HVRET1K, below).

Assembly: The assembled version is fully built and ready to use; the kit requires wiring and soldering to a printed circuit board with some basic mechanical assembly.

- Assembled and Tested ... $64.95
- Kit/Plans ... $44.95
- Paper Plans ... $6.00
- Downloadable Plans ... $3.00
- Optional 220V Stepdown Transformer for overseas customers ... $19.95

High Voltage Retrofit
For above MTC30Tesla Coil

Additional parts for our high voltage retrofit kit HVRET1
Allow you to do the following:
  • High Speed Ion motor
  • Force Field
  • Motion Freezing/ Time Quenching
  • Transmission of Charge
  • High Voltage Low Current Power Supply
  • Negative Ion Generator
  • Lightning Generator
  • Ion Wind, Anti Gravity, Air Purification etc
- High Voltage Retrofit Kit & Plans for MTC30 ... $39.95
hvret1k

 

Mini Tesla Lightning Machine
Tesla Lightning Machine
Video: This was recorded at 60 frames
per second, but the video could not
keep up with the audio. Each "pop"
you hear represents a spark.

This device is intended as an attention getting desk or bar special effects piece. Produces an adjustable repetition of high voltage open-air spark discharges of several cm.

Easy to build Tesla coil produces up to a 50 mm point to point 40,000-volt spark discharges. Spark repetition rate is selectable between a heavy and slow or a fast and light discharge. Sparks are very audible and visual for the small size of this unit.

Operates from a 12-volt battery or a safe 12 volt 300 ma wall adapter (included) to run off wall power. Unit features a built in timer allowing individual adjustment of "off" and "on" times from several seconds to several minutes. Once the "off" and "on" cycling times are set, the unit can be left on as an interesting display.

Excellent action science display project or use as a room desk or bureau piece. Unit includes Off/On, Timer Enable/Disable and Spark Texture Switch. Device is built in a 6 x 2.5 x 2" plastic enclosure. Kit includes all parts with a fully screened printed circuit board.

Assembly: The assembled version is fully built and ready to use; the kit requires wiring and soldering to a printed circuit board with some basic mechanical assembly.

Applications: A conversation piece, special effects prop, office or bar action decoration.

  • 2 to 3" Spark Discharges
  • 12 VDC/115 VAC/battery
  • Safe High Frequencies
  • Adjustable Output

With Adjustable "On and Off" Time Settings

- Assembled and Tested ... $69.95
- Kit/Plans ... $49.95
- Paper Plans ... $5.00
- Downloadable Plans ... $3.00
- Optional 220V Stepdown Transformer for overseas customers ... $19.95

 

Solid State Tesla Coil and Jacobs Ladder
Run As A Jacob's Ladder
Turns A Normal Light Bulb Into A Spectacular Plasma Display!
Build a Plasma Tornado, Demonstrates Pyrotechnic Effects
hvret1k
 Amazing and bizarre effects!
 Excellent science project!

 

  • Transmits Wireless Energy
  • Noiseless Operation
  • Pyrotechnic Effect
  • Runs on 12VDC/5A Battery or Adapter (not included)
  • Adjustable Frequency
  • Control For Effect

Solid-state Tesla coil using readily available television fly back transformers and operating from 12 volts DC (from either a battery or 115-vac wall adapter, not included). Versatile circuit can be used to make a Jacobs's ladder, plasma tornado, wireless energy demonstration, pyrotechnic electrical display and even turn a normal light bulb into a low-cost plasma globe.

Unit is built onto a plastic channel of 7.25 x 2.5 x 3" with a coil enclosure of 5 x 3.5" diameter. All controls are on an aluminum front panel and include a fuse, power switch and power control. Operation with light loads must be done with caution as open circuit voltage will soar at resonance and cause the output transformer to burn out. When the unit is operated as a Jacob's ladder or connected to a large neon display it may be left on indefinitely. Unit is fully short-circuit protected.

In lightbulb mode, it uses a 5" clear 100W 'DECOR' bulb (not included) which may be found at your local hardware or home decorating store.

Assembly: The assembled version is fully built and ready to use; the kit requires wiring and soldering to a printed circuit board with some basic mechanical assembly.

Assembly: Wire and soldering to a printed circuit board with some basic mechanical assembly.

Applications: Use as a high frequency high voltage generator for research, conversation piece, special effects prop, and office or bar action decoration.

You provide the power supply from a 12v battery or wall adapter (not included); or you may purchase one of our recommended 12V power supplies, below.

- Assembled and Tested ... $119.95
- Kit/Plans, includes wound and phased transformer ... $89.95
- Paper Plans ... $15.00
Downloadable Plans ... $6.00

Options for 12V DC Power Source (not included):
- 12VDC Gel Cell Battery, for Field Use ... $29.95
- 115VAC Wall Power to 12VDC@7A ... $39.50

Optional Neon Tubes to demonstrate wireless energy transfer:
- 12" U-shape neon tube (red) ... $19.95
- 12" U-shape neon tube (green) ... $19.95
- 12" U-shape neon tube (blue) ... $19.95
- 12" U-shape neon tube (white) ... $19.95
- Optional 220V Stepdown Transformer for overseas customers ... $19.95

 

Worlds Smallest Tesla Coil
Generate Bolts of Lightning
Crashing Against the Inner Walls of a 5" Lamp!

Smallest Tesla Coil

Smallest Tesla Coil

Great for science fairs and small HV experiments, an attention-getting office or bar action decoration, a conversation piece, or other special effects prop. Produces an adjustable repetition of high voltage open-air spark discharges of up to several cm.

Unit is built into a 3 x 2 x 1" plastic box and is powered by a three wire grounded line cord operating from 110 vac. As a safety measure the output winding is directly connected to the earth grounded green lead of the power cord. This prevents any accidental contact to the 115 vac that could occur by accident or by a circuit fault.

Power and repetition rate are controlled by a combination potentiometer and switch. Output voltage pulses are up to 40 kv at .2 Joules and can be adjusted from a slow to fast pulse rate. Sparks are very audible and visual for the small size of this unit.

  • Generate Up To 40 KV Discharges
  • Experiment With HV Effects
  • Plasma In A Jar, St Elmo's Fire, Corona Etc.
  • Output Discharge Control
  • Small Size 3 in.x 2 in. x 1.5 in.
  • 115V Line Direct Operation
- Assembled & Ready To Use ... $54.95
- Kit/Plans (Requires Assembly) ... $39.95
- Paper Plans ... $7.00
- By Download ... $3.00
- Optional 220V Stepdown Transformer for overseas customers ... $19.95

Special note on toroid construction.The toroid's we sell, unless specified are intended to be used for Tesla coil capacitive terminals. These pieces are normally welded and brushed if to be used for high-voltage DC applications and must then be highly polished to almost a mirror finish. For Tesla applications they do not need to be that finished looking texture except of course for aesthetics. The added feature of polishing and welding adds more to the cost as Polishing can be very very costly. This feature does not improve performance of your coil.

We at information unlimited plan to make toroid's up to 30 inches in diameter. These will be two pieces put together using a special epoxy as are our currently available 8, 12, and 18" However if they are to be used in high-voltage DC applications they will be welded and as mentioned before highly polished.

We now have tooling for our 18 inch model and will be offering this part for all types of Tesla coils requiring this capacitive load. Those who want the piece welded this is an option and of course polishing is another option.

There is nothing more pleasing to the eye than a high-performance Tesla coil a meeting sparks and arcs from a properly sized toroidal terminal. Hopefully we can offer these parts more economically to the builder than what is currently available 

We stock many sizes of aluminum spun TOROIDS, OBLATES and other terminals.
These are available un-polished but ready to use for Tesla coil applications. If you intend to use them for high-voltage DC stacks or multipliers you will need to either polished them yourself to a very shiny mirror like surface or have this done for you.
toroids, toroidal terminals

These toroids are spun aluminum of grade 1100-O (99% pure aluminum), with a narrow seam around the diameter (the seam is welded on sizes above 12" that is smoothed and polished and cannot be seen). Excellent for Tesla coils requiring a capacitive terminal. High voltage DC generators require a highly polished surface to prevent leakage losses, This is contrary to TESLA operation where you want air leakage to make the sparks

Our laboratory has the tooling and now offers many sizes of toroidal terminals: have a look at our free PDF sheet to see other available sizes from 3 to 98 inches!

Toroids 36" or larger will be shipped on a pallet by freight, and may require 9-12 weeks for fabrication. Shipping costs may exceed the amount shown -- please contact us for details on these larger toroids.

- For coils up to 250Kv, 8" x 2" with 1/4" Center Hole ... $59.95
- For coils up to 500Kv, 12" x 3" with 1/4" Center Hole ... $79.95
- For coils up to 750Kv, 18" x 4.5" Welded with 1/4" Center Hole ... $229.95
- For coils up to 850Kv, 20" x 5" Welded with 1/4" Ctr Hole ... $369.95
- For coils up to 1Mev, 24" x 6" Welded with 1/4" Ctr Hole ... $469.95
- For coils up to 1.25Mev, 30" x 7" Welded with 1/2" Ctr Hole ... $645.95
- For coils up to 1.5Mev, 36" x 8" Welded with 1/2" Ctr Hole ... $1085.00
- For coils up to 2Mev, 40" x 10" Welded with 1/2" Ctr Hole ... $1325.95
- For coils up to 2Mev, 68" x 18" Welded with 1/2" Ctr Hole ... $2750.00

Quantity discounts available. Contact us for other sizes.

big toroid

Spherical Metallic Terminals
toroids, terminals We now can supply you with spherical metallic terminals for your projects. Not only do these pieces offer aethestic value they also provide an amount of capacitance for enhancing the output of Tesla coils and supply the surfaces necessary for reducing leakage in high voltage dc sources. All have 3/8" mounting holes (not threaded). View free PDF sheet for other available sizes up to 65 inches!
- 4" Steel Spheroid, Good Up To 140 kv ... $9.95
- 2" Brass Spheroid, Good Up To 70 kv ... $9.95

Aluminum Oblate Terminal
Oblate Terminal We now can offer the high voltage researcher a 14-inch terminal that supports up to 500,000 volts. The 14" diameter (9" across the oblate) has a 3-3/4" hole for mounting onto an insulated column and can be used for the collector terminal of a Van de Graaff generator.
- 14" Aluminum Oblate Terminal ... $249.95

3+ @ $199.95ea.


Neon sign Transformers designed for Tesla coils

Original built neon Transformers are almost perfect for use in Tesla coils. The impedance matches readily available capacitors that form resonant circuits that are easily coupled to the resonant secondary coil. The only problem with the original neon sign transformer is it was not designed to support the open circuit voltage. When powering a gas discharge tube, the voltage would drop and quickly stabilize to the negative resistance of the gas discharge. When a neon transformer is used in a Tesla coil great care must be taken to prevent the sustained high-voltages now across the transformer. These are accompanied by RF currents and other transient's that can breakdown the original insulation that the transformer was never designed for.

Our engineers gave it a lot of thought and said why not use the already existing tooling, cases and all the other readily made fabrications, core, coils etc. etc. used for a conventional neon transformer and build in the extra beef and add some type of a filtering network that would prevent sustained high voltage breakdown. To make a long story short we had our transformer made by a company that was very cooperative with our request and proceeded to make these Transformers under our design parameters for the output. It took two tries but we can now say to run these Transformers for a Tesla coil only requires a simple 300 to 1000 ohm 25 W wire wound resistor that now greatly simplifies construction. Conventional neon sign transformers for reliable operation require our suppressor circuit that is not a big deal but does add to the construction and cost. This is eliminated when using our proprietary designed Transformers that incidentally are private labelled.


TESLA COIL TRANSFORMERS
Designed and built for use in Tesla coil applications as stated in download. Brand new and only require two resistors for reliable operation. Easily combined for 220 volt operation by series connecting primaries and parallel connecting the secondary’s.
15kv 60ma transformer

15kv 60ma transformer 15kv 60ma transformer

We have now have our own 15000 volt 60 ma current-limited transformers. These are brand new, factory-fresh transformers specially made for Tesla coils (and also work with JACOB’S LADDER and HIGH VOLTAGE POWER SUPPLIES and many other high-voltage applications. See download for more data.

They do not contain the GFI that is necessary for UL 2161 when used for neon sign applications therefore they should not be used for neon installs. These do not require the suppression circuits that normal neon Transformers do when used for Tesla coils except for two 300 to 1K 25 watt resistor on each electrode. You can run two units in parallel this way. If you use more it is suggested using our SUP10 suppression circuit.

Notes:

These Operates from 115 vac, and up to 6 are easily parallel connected for higher power operation. Six units connected in this way can produce 15000 vac rms at 360 ma. This is enough power to make a large TESLA coil easily producing 10+ foot arcs (such as our BTC70). May also be connected for 7500 volts at 720 ma

Center point grounding can produce dangerous ground currents. Follow all safety rules dealing with high voltages

- 15kv 60mA non-GFI Transformer ... $319.95

Tesla Coil Transformer 6KV at 30ma Used in our BTC30.
Produces up to 15 inch streamers in a properly designed Tesla coil. Only requires resistors for reliable operation.

 

6kv 30ma transformer

Note: these non-GFI transformers are NOT to be used with luminous tubes such as neon lighting. It is dangerous and illegal to do so.

6KV 30ma, centerpoint grounded secondary, current limited, encased unit with screw terminals. This transformer is excellent for small table top Tesla coils and is used in our new and revised BTC3K kit and BTC30 ready-to-use Tesla coils. Dimensions: 10 3/8 x 3 5/8 x 3 1/4" with a weight of 11.4lbs. Shipping weight is approximately 17 pounds and may exceed $25.

- 6kV 30mA non-GFI Transformer ... $69.50

NEON SIGNS TRANSFORMERS 60ma
Designed and built for use in neon lighting applications. Unused but may require our SUP10 Suppressor shown in our store for reliable operation. May also be used for JACOBS LADDER displays without suppression circuits. Great for high voltage supplies. Many available voltages at the standard 60 ma. values. These units do not have GFI s. Most in original boxes.

12000 volt 60ma will generate 4 foot streamers in a properly designed TESLA coil system

This transformer can produce over a 3” impressive flaming hot arc when used for a Jacobs ladder.

Use for DC power supply Full Br 12kv60ma / Half Br 6kv120ma using our VG15KV200 rectifiers

....... $129.95


6000 volt 60ma will generate 1.5 foot streamers in a properly designed TESLA coil system.

This transformer can produce over a 1” impressive flaming hot arc when used for a Jacobs ladder.

Use for DC power supply Full Br 6kv60ma / Half Br 3kv120ma using our VG15KV200 rectifiers

....... $79.95
...... $79.95


5000 volt 60ma will generte almost 1.5 foot streamers in a properly designed TESLA coil system.

This transformer can produce over a 1” impressive flaming hot arc when used for a Jacobs ladder.

Use for DC power supply Full Br 5kv60ma / Half Br 2.5kv120ma using our VG15KV200 rectifiers

Two styles to choose from Original ALLISON and MAGTEC Sizes

....... $59.95
...... $69.95


4000 volt 60ma will generate almost 1 foot streamers in a properly designed small TESLA coil .

This transformer can produce an impressive flaming hot arc when used for a small Jacobs ladder.

Use for DC power supply Full Br 4kv60ma / Half Br 2kv120ma using our VG15KV200 rectifiers

Original ALLISON Size

....... $59.95


3000 volt 60ma will generate impressive streamers in a small TESLA coil suitable as a desk piece

Can produce a traveling arc when used for a small Jacobs ladder but may be finicky to set up.

Use for DC power supply Full Br 3kv60ma / Half Br 1.5kv120ma using our VG15KV200 rectifiers

Original ALLISON Size

....... $49.95


All purchases include our BTC3 Tesla coil plans and a secondary protection circuitry schematic when used for TESLA COILS as suggested by the late DC COX of RESONANCE RESEARCH. The 60 milliampere transformers will require down loading our hazardous equipment affidavit

Safer 30ma Neon Signs Transformers
Designed and built for use in neon lighting applications. Unused but may require our SUP10 Suppressor shown in our store for reliable operation. May also be used for JACOBS LADDER displays without suppression circuits. Great for high voltage supplies. Less display than above 60ma units but safer to use. These units do not have GFI's. Most in original boxes

7500volt 30ma will generate close to 1.5 foot streamers in a properly designed TESLA coil system.

This transformer can produce over a 1” impressive flaming hot arc when used for a Jacobs ladder.

Use for DC power supply Full Br 7.5kv30ma / Half Br 3.75kv60ma using our VG15KV200 rectifiers

High voltage leads are easily connected internally preventing accidental contact.

....... $39.95


5000volt 30ma will generate close to1 foot streamers in a properly designed TESLA coil system.

This transformer can produce a 3/4 flaming hot arc when used for a Jacobs ladder.

Use for DC power supply Full Br 5kv30ma / Half Br 2.5kv60ma using our VG15KV200 rectifiers

High voltage leads are easily connected internally preventing accidental contact.

....... $34.95


3000volt 30ma will generate close 4 to 6” streamers in a properly designed TESLA coil system.

This transformer can produce a ½” flaming hot arc when used for a Jacobs ladder.

Use for DC power supply Full Br 3kv30ma / Half Br 1.5kv60ma using our VG15KV200 rectifiers.

High voltage leads are easily connected internally preventing accidental contact.

....... $29.95


Odd ball transformers similar to above. You must call to order these as limited 603-673-4730

Order-4KV/30-1 MAGTEK……………………………….$34.95

Order-7.5KV/60-2 MAGTEK……………………………….$74.95

Order-9KV/30-1 ALL……………………………….$69.95

Order-9KV/60-2 ALL……………………………….$99.95

Utility transformers, commonly called pole pigs, intended for the experienced Tesla coil builder.
These are very dangerous and require special handling, wiring and safety procedures. They do require current control as the Transformers contain very little leakage reactance. Many of the experienced Tesla coil gurus use Lincoln arc welders as a source of adjustable reactance connected in series with the 220 V input and power factor correct though not necessary. The transformer is obviously used in a backward connected mode. These Transformers are double bushing and are not center point grounded as they are intended for open delta input. We have these Transformers in power levels from 5 kW to 25 kW. They are very heavy but will take extreme abuse. Most Transformers can be delivered to your premises without a problem. These Transformers will only be sold to companies or qualified individuals who are known to be experienced in high voltage. A hazardous equipment affidavit will be sent to you for your signature before we ship the part.
14.4KV Pole Transformer DANGEROUS PRODUCT -- CAN CAUSE ELECTROCUTION IF IMPROPERLY HANDLED

Heavy duty 14.4KV (very conservatively rated), 1- or 2-bushing oil filled unit, running on 120/240VAC input. Good for Tesla Coils, up to 20 ft. discharges! Use of these Transformers will require primary ballasting on the low voltage side. This can be done using either resistors or the much more efficient and preferred inductive ballast using a LINCOLN AC225S amp arc welder (model K1170 available through HOME DEPOT) works well. This reactive energy can be power factor corrected using an appropriate capacitor though not necessary.

Price does not include extra shipping and handling charges. Sold only to qualified researchers and labs.

- 3 KVA 14.4 KV Pole Mount 120/240 1PH 2 Bush AL Wire ... $595.95

            ~250lbs, 42"H x 14.5"D (21" w/attachments)

- 5 KVA 14.4 KV Pole Mount 120/240 1PH 2 Bush AL Wire ... $595.95

            ~250lbs, 42"H x 14.5"D (21" w/attachments)

- 7.5 KVA 14.4 KV Pole Mount 120/240 1PH 2 Bush AL Wire ... $695.95

            ~250lbs, 42"H x 14.5"D (21" w/attachments)

- 10 KVA 14.4 KV Pole Mount 120/240 1PH 2 Bush AL Wire ... $795.95

            ~250lbs, 42"H x 14.5"D (21" w/attachments)

- 15 KVA 14.4 KV Pole Mount 120/240 1PH 2 Bush AL Wire ... $895.95

            ~350lbs, 34.5"H x 18.5"D (24" w/attachments)

- 25 KVA 14.4 KV Pole Mount 120/240 1PH 2 Bush AL Wire ... $995.95

            ~300lbs, 37.5"H x 16.5"D (23" w/attachments)


Air Cooled Two Point Spark Gap for Tesla Coils up to 8’ Sparks
Spark Gap Switch Excellent for Tesla Coils up to 36"

Intended for Tesla coils power up to 15Kv at 180ma. Available with 3/8" machined tool steel or pure tungsten electrodes. 115 Vac is required for the high output fan. Ready to use with connection lugs. Size is 5 x 5 x 4". Our BTC40, 50, and 60 use this setup.

Use two in series for a four point gap for Tesla power up to 15Kv at 400ma producing up to 15’ sparks. Our BTC70 uses this setup

- With 2 x 3/8" Tungsten Electrodes ... $149.95
- With 2 x 3/8" Tool Steel (not Tungsten) Electrodes ... $59.95

Convection Cooled Single Gap System for Small Coils With power to 8Kv at 60ma
Spark Gap Switch Excellent for Tesla Coils up to 12"

Intended for Tesla coils up to 8Kv at 60ma. Uses ¼" pure tungsten electrodes mounted on aluminum heat dissipating fins. Horizontal retaining screws for easier access and adjustment of spark gap width. Base is polycarbonate with mounting holes. Includes high current connection lugs. Size is 5½" x 2 x 2". Used in our small BTC30 doing 14” sparks.

- With ¼" x 1" Tungsten Electrodes ... $59.95

We also carry solid copper block holders or the more attractive PANDUIT holders. We tested for temperature rise and peak current and found no difference between the lower cost aluminum or copper holders.


1/4" x 1" Pure Tungsten Electrodes Coils up 7500 v 60 ma
coil gun

With connecting mounting blocks and terminations, or individual tungsten rods only Precision machined and faced. Self cleaning and cool running, will not oxidize. May be connected in series for multiple gaps handling greater power

- 1/4" x 1" Tungsten Electrode Pair with Mounting Blocks ... $39.95
- One (1) Tungsten Electrode 1/4" diameter x 1" length ... $14.95

3/8” x 2” Pure Tungsten Electrodes 15000 v 120 ma
coil gun

With connecting mounting blocks and terminations, or individual tungsten rods only Precision machined and faced. Self cleaning and cool running, will not oxidize. May be connected in series for multiple gaps handling greater power

- 3/8" x 2" Tungsten Electrode Pair with Mounting Blocks ... $89.95
- One (1) Tungsten Electrode 3/8" diameter x 2" length ... $39.95

Specialized Capacitors for High Power Tesla Coils.
These are expensive but highly reliable for special displays as museums, research and the more professional applications. We have lower cost alternatives using MMC and other options for this part. These less costly choices are perfectly suitable for the hobbyist and experimenter
Capacitor

These specialized capacitors are made for Tesla coil applications where high frequency and high current operation is required

Capacitors are constructed with a polypropylene dielectric being specially wound to reduce corona and have a high voltage standoff capability. Capacitors are also designed to withstand the multiple discharges of a rotary gap system of up to 600 breaks per second with a suggested operating frequency of 30 kHz.

Capacitors are enclosed in a high impact PVC tubing and epoxy sealed. Terminations are via appropriate sized studs axially positioned. Our standard value is .05 ufd at 20 kvac (but others are available). This value provides an excellent combination when used with the readily available 14.4 kvac pole transformer in the 7 to 10 kva range. One capacitor will utilize one half this kva range while two in parallel with utilize the full rating and produce in excess of 10 foot discharges. (We use the .01u/10KVAC capacitor in our BTC30 tesla coil, and the .015u/12KVAC capacitor in our BTC40 tesla coil.)

Capacitors are enclosed in a high impact PVC tubing and epoxy sealed. Terminations are via appropriate sized studs axially positioned. Our standard values are shown and in stock most of the time. We have many other values and can design one for a special coil or other application.

We used a combination of these very specialized pieces in a contract that involves pre-detonation of IEDs and other similar devices showing proof of concept.

- .01µfd at 10KVAC, 2-3/8" x 7-½" cylindrical (used in our BTC30) ... $99.95
- .015µfd at 12KVAC, 2-7/8" (used in our BTC40) ... $209.95
    - .02µfd at 10KVAC, 2-3/8" x 7-½" cylindrical (used in our pre-2012 BTC40) ... $229.95
- .05µfd at 20KVAC, 6-5/8" x 14 -½" cylindrical ... $559.95
- .1µfd at 20KVAC, 6-5/8" x 22" cylindrical ... $749.95

Fully Prepared Secondary Coils

All coil forms used are thin wall TYPE1 PVC and before winding are cleaned inside and out with a suitable solvent. They are then placed in a special vacuum chamber that will accommodate up to 10 coils depending on their size of course. This chamber is fitted with 10 microwave magnetron's properly spaced to provide homogenous heating to the PVC driving out the moisture with the vacuum system pumping it out. We find this method appears to enhance performance but we have no real documentation to make comparisons with. We feel it's a good start

The form is then given a coat of polyurethane and wound on our programmable auto feed. Wire used in a heavy thermalize (optional colors of gold, red, green, and blue are available) Several coats of polyurethane each coat allowing to fully dry before the application of the next coat is applied


BTC30 Secondary Coil

BTC3COIL: 13" high, 3.5" diameter, 1/8 thick low-loss treated PVC. Wound with #24 heavy magnet wire with 443 turns. Inherent resonant frequency is ~500kHz freestanding without terminal.


- 12" Wound Secondary Coil ... $99.50

BTC40 Secondary Coil

BTC4COIL: 20.5" high, 4-5/8" diameter, 1/8 thick low-loss treated PVC. Wound with #24 heavy magnet wire with 780 turns. Inherent resonant frequency is ~200kHz freestanding without terminal.


- 20" Wound Secondary Coil ... $149.50

BTC50 Secondary Coil

BTC5COIL: 21.5" high, 4-1/4" diameter, 1/8 thick low-loss treated PVC. Wound with #22 heavy magnet wire with 650 turns. Inherent resonant frequency is ~150kHz freestanding without terminal.


- 21" Wound Secondary Coil ... $179.95

Whirling Spinner for BTC Series Tesla Coils
spinner

Place this 3-pronged spinner on top of your tesla coil (works on core & coil, solid state, and vacuum tesla coils alike) and watch the sparks shoot out of the tips of the spinner as it begins to turn. Since the electrons are mutually repelled from each other, this forces them to travel down the arms and be emitted at the pointed ends, causing this well-balanced rotor to spin at increasing speeds, emanating sparks as it goes.

Also includes parts for use on Van de Graf generators (accumulating disk and offset wand) which causes a similar spin, but at reduced speed and minimal sparking from what tesla coils can produce.

A fun accessory for your BTC-series tesla coil!


- 21" Whirling Spinner for Tesla Coils and Van de Graf Generators ... $99.95

Specialized Capacitors for High Power Tesla Coils
Capacitor

These specialized capacitors are made for Tesla coil applications where high frequency and high current operation is required.

Capacitors are enclosed in a high impact PVC tubing and epoxy sealed. Terminations are via appropriate sized studs axially positioned. Our standard value is .05 ufd at 20 kvac (but others are available). This value provides an excellent combination when used with the readily available 14.4 kvac pole transformer in the 7 to 10 kva range. One capacitor will utilize one half this kva range while two in parallel with utilize the full rating and produce in excess of 10 foot discharges. (We use the .01u/10KVAC capacitor in our BTC30 tesla coil, and the .015u/12KVAC capacitor in our BTC40 tesla coil.)


- Cylindrical, 2-3/8 x 7-1/2" (used in BTC30) ... $99.95

- Cylindrical, 2-7/8 x 10-3/4" (used in BTC40) ... $209.95

- Cylindrical, 6-5/8 x 14" ... $559.95

- Cylindrical, 6-5/8 x 22" ... $749.95

- Cylindrical, 3-1/2 x 7-1/4" (used in our pre-2012 BTC40) .....$229.95


Vacuum Tubes
vacuum tube

Brand new and unused power triode vacuum tubes for our VACTESLA10 vacuum tube tesla coil. (The 833C carbon vacuum tubes can withstand higher operating temperatures than the standard metal-based 833A vacuum tubes.)

This vacuum tube is used in our VACTESLA10 tesla coil, and it is listed here if a replacement is needed, or if you are making your own vacuum tube tesla coil.

Dimensions are 8.75" height x 4.5" outer diameter.


- Power Triode Vacuum Tube ... $179.95
- Power Triode Vacuum Tube Carbon ... $194.95