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250,000 Volt Table Top Tesla Coil

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Product Description


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.

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.

  • Transmit wireless energy
  • Materials glow, disintegrate, burn
  • ION motors, induction fields
  • Corona and St. Elmo's Fire
  • Amazing and spectacular special effects
  • Dimensions: 23" high x 12" sq. base, 25 pounds weight
BTC30 Instructions & Applications


TR220/110/300 - Optional 220V 300W Stepdown Transformer for overseas customers



  • The BTC 30 is not designed to run for the LAKHOVSKY treatment times required.
  • The BTC 30 is not designed with the necessary shielding to prevent over exposure from ultraviolet rays.
  • The BTC 30 does not have the protective housing necessary when working with the public from possible dangerous painful electrical shocks.
  • The BTC 30 uses components that are not rated for the necessary times the unit must be left on. These components will fail and sometimes can dangerously self-destruct.


This item is assembled and ready to use.
It is also available as a kit with plans and all parts, requiring assembly.
Or as plans (paper or downloadable versions), with parts and assembly required.

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Product Reviews

  1. Best performing small spark gap coil 5 Star Review

    Posted by on 6th Apr 2022

    Great performance - when properly tuned and peaked you will get 6-8" brush discharges from a drain wire or probe while random discharges pop and rotate from the top load. I have had perfect performance and no failures - follow the instructions on gap spacing and on time! This is a great example of an old school Tesla-style coil.
    Was missing a few pieces of hardware but they were sent.

  2. Tesla Would Be Proud 4 Star Review

    Posted by on 5th Apr 2022

    Compact and great performance. Nice package.

  3. Great Tesla Coil 5 Star Review

    Posted by on 22nd Aug 2021

    Nice reliable performance in its original form.

  4. Best bang-for-your-buck Tesla Coil 5 Star Review

    Posted by on 16th Feb 2020

    I've purchased about a dozen different Tesla Coils from a variety of manufacturers and this coil is by far the best quality and most impressive. I've had it now for about 1.5 years and never had a single issue. I can not say the same for any of the other coils I have purchased.