“Modified Tesla coil”?

Really?? Seriously? Hey AmpCoil – how gullible do you think people are?


This is a Tesla coil!  And that is Nikola Tesla.

We started by asking, “Really? Seriously?”, so really, let’s get serious…
We believe the consumer nor the general PEFM industry is served by sales baloney, and this is about as good of an example as we’ve seen of just that…sales baloney.  Just because a Tesla coil and a PEMF coil are both coils does not mean that one is a derivative of the other, any more than a tire is a derivative of a steering while just because they’re both “wheels” and both can be used to steer a car.  Also, AmpCoil uses “modified Tesla coil” to imply their coil is somehow unique in the PEMF world.  Their coil is simply a coil of copper wire.  Other brands are coils of copper wire.  If AmpCoil’s coil is somehow a “modified Tesla coil”, then so are all the other brands of coils!
So let’s take a look at what a Tesla coil really is and see if there is any relationship between that and a PEMF coil.
From Wikipedia, we find, The Tesla coil is an electrical resonant transformer circuit designed by inventor Nikola Tesla in 1891.  It is used to produce high-voltage, low-current, high frequency alternating-current electricity.①

Tesla used these circuits to conduct innovative experiments in electrical lighting, phosphorescence, X-ray generation, high frequency alternating current phenomena, electrotherapy, and the transmission of electrical energy without wires.②  Tesla coil circuits were used commercially in spark gap radio transmitters for wireless telegraphy③ until the 1920s, and in medical equipment such as electrotherapy④ and violet ray devices⑤.  A Tesla coil is a radio frequency⑥ oscillator that drives an air-core double-tuned resonant transformer to produce high voltages⑦ at low currents.  

Tesla coils can produce output voltages from 50 kilovolts to several million volts for large coils⑧.  The alternating current output is in the low radio frequency range, usually between 50 kHz and 1 MHz⑨. Although some oscillator-driven coils generate a continuous alternating current, most Tesla coils have a pulsed output; the high voltage consists of a rapid string of pulses of radio frequency⑩ alternating current.”

① A Tesla coil is used to produce electricity, a PEMF coil is used to produce a magnetic field.

② A Tesla coil is used for all of these things (none of which you would ever want your PEMF coil to do) wirelessly…but you connected your AmpCoil coil to the AmpCoil case with what?  A wire?

③ Radio transmitters, telegraphs…both wireless.  How does that have anything to do with a PEMF coil.

④ PEMF is NOT electrotherapy!  It is frequency therapy delivered via a magnetic field.  Big difference!

⑤ Violet rays are in the light spectrum.  PEMF is about as far away from that spectrum as you can get.

⑥ Radio frequencies are, like the light spectrum, are about as far away from PEMF frequencies as you can get.

A Tesla coil is a high voltage and high frequency device, a PEMF coil is a low voltage and low frequency device.

⑧ Like we said, Tesla coils produce HIGH voltage.  50 kilovolts and up.  That’s 50,000 volts!  If that’s what would work, we can all give up our PEMF machines and just go sit under electrical transmission lines!

⑨ Tesla coils produce radio frequencies.  50 kHz and up.  That’s 50,000 Hz!  If that’s what would work, we can all give up our PEMF machines and just go sit next to a radio broadcast tower near the electrical transmission lines we’re under!

⑩ Just because it’s pulsed does not mean it’s PEMF.

If you modify a circle by giving it corners your have created a square, now its no longer a circle…  its a square. AmpCoil apparently thinks they can bamboozle you into believing their squares are better than anyone else’s squares by calling them “modified circles”.  We think you’re starter than that.

One more thing to understand about AmpCoil’s use of “modified Tesla coil” to pull one over on you…

What’s in a name?
There are two accepted methods for measuring magnetic field strength, gauss (G) and tesla (T).  Gauss is named after Johann Carl Friedrich Gauss (born 1777) and telsa is named after Nikola Telsa (born 1856).

It is a little like measuring in inches or centimeters, Celsius or Fahrenheit.  Each has areas where they work better or easier.  Each can be converted into the other.


To say that a coil is a “modified Tesla coil”, just because magnetic fields can be measured in tesla (T), is like saying an amplifier is a “modified voltage circuit” just because power is measured in Volts (V).

Just for fun, here’s a list of other scientific measurements named after famous scientists:

André-Marie Ampère



Electric current

ampere (A)
(Base unit)


kelvin (K)
(Base unit)



pascal (Pa)


British (English)

newton (N)





British (Scottish)


volt (V)


ohm (Ω)


British (English)

farad (F)


henry (H)



weber (Wb)




British (English)

joule (J)




Serbian American

tesla (T)



hertz (Hz)



Dose equivalent of radiation

sievert (Sv)

Inline image

About Julie Nichols

I'm a retired elementary teacher who has diabetes and had an accident in which I fell in a wheelbarrow...yes that's right a wheelbarrow! Between the two I sustained considerable nerve damage. Then one day Larry Langdon came to my home with a PEMF device he developed and had for his Lyme disease, after one session I was pain free for five days. This lead me to research PEMF ( Pulsed Electromagnetic Field) therapy and I found that it has been around for at least 40 years. I have found that NASA has done thousands of studies and uses PEMF, as does the military. It is also well known and used throughout Europe. This is the beginning of my journey into PEMF the rest of my journey you will learn about through this blog. In the end it's about making this technology available to everyone for general health improvement.
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