Based on the research of Georges Lakhovsky
The story of the Lakhovsky Oscillating coil

The "Zapper"

The term "zapper" was coined by Dr. Hulda Clark for an electronic generator that produces a square-wave signal used in experimenting with curing a multitude of ailments. There are some different theories regarding why the zapper does what it does.  The pulses produce a current through the body thought to destroy parasites and worms in the blood. For this reason, the term "blood electrification" is sometimes used. The shape and frequency of the pulses are critical and theorized to resonate with pathogens killing them, bringing about the term resonate therapy. Some of the pioneers that have experimented with this process are Georges Lakhovsky, Royal Rife, Dr. Hulda Clark, Dr. Robert Beck, and Don Croft, just to name a few.

The zapper is a limited version of the "Rife Machine" and has been expanded, modified and renamed to include the "Terminator" and "Blood Electrifier". The heart of the Zapper is a simple electronic integrated circuit originally designed in the early 1970s for use as a timer for automatic room deodorizers. The circuit has many applications and is easily designed to provide a square-wave at the frequencies and levels needed for the blood electrification process. A square-wave is the product of an infinite number of odd harmonics (multiples of the base frequency). The frequencies used for this application are based around the "Schumann earth frequency", 7.84 Hz..  Hulda Clark's original zapper operated at 33,000 Hertz. Her unit worked but, Dr. Bob Beck's blood electrifier designed to operate at 3.92 Hertz was better. Don Croft's Terminator raised the frequency to 15 Hertz which is actually close to the second harmonic of the Schumann earth frequency and seems to be superior to both the previous units.

To get past all the technical stuff and cut to the chase, keep in mind that individual results when using the zapper may vary. Claims of a medical nature can not legally be made or inferred concerning the use of this device. This device has not been governmentally evaluated for medical or any other purposes and is available only for personal research and experimentation. Consult a medical professional of your choice for medical advice, treatment, and diagnosis. Since the Zapper is electrical it is not recommended for anyone with a pacemaker.

As the former head of technical support of the manufacturer of the unit which Royal Rife modified and turned into the Rife Generator, I received many calls from people with questions and information about resonance therapy, blood electrification, and zapper applications.

I personally have used an 18 Volt 33,000 Hertz zapper unit for the last seven years. The results have been extraordinary. The unit has a meter that indicates the current level which is from 100 to 800 microAmps depending on the wetness of the electrodes.

A caller from Texas (part of a research group) told me that their findings showed that anything over 500 microAmps gave diminished results. This new unit provides an average current of around 450 microAmps when using the standard application method given in the instruction sheet. The slow pulse rate of 15 Hertz can actually be felt by the user as opposed to the high rate of the older unit which could not be felt.