Special Frquency Can Kill Virus. - YouTube  








Zapper Frequently Asked Questions

clark zapper


What is a zapper?

A "zapper" is defined by Dr. Hulda Clark as a battery operated DC pulse (positive offset) generator with an output amplitude of 5 to 10 volts (open circuit) and a frequency between 10 Hz and 500KHz (10 to 500,000 pulses per second), with a current limited output and a 0.25 volt constant offset. The Auto-Zap zapper puts out 2500 DC pulses per second with full 9 volt battery voltage, through a 1000 ohm current limiting resistor.


What does a zapper do? How does it work?

Dr. Clark has been kind enough to share her research and findings regarding the function of zappers with us. Contrary to popular belief, the zapper's primary mode of operation is not to electrocute parasites (as hypothesized in Dr. Clark's earliest publications) but rather, the zapper appears to stimulate the body's own natural defenses.  Initially, it was believed that parasites and other pathogens were affected directly by the zapper's current.  More recently... she has modified this position. It is now believed that this is a secondary affect that is created by the zapper's signal. 

According to Dr. Clark's research and our personal experience, the tiny zapper current subtly energizes the bloodstream. This aggressively activates all types of white blood cells, enabling the body to "take out the trash," including parasites large and small, bacteria and most viruses. It happens quickly, in about an hour. The white blood cells digest the dead invaders and they are flushed out via the kidneys. In Dr. Clark's most recent edition of "The Cure for HIV and AIDS," she notes that the zapper gets white blood cells active despite the presence of toxins that usually put them to sleep.

The internet is full of confusing information based entirely upon Dr. Clark's 1993 publication of "The Cure for All Cancers," however, in recent years Dr. Clark has revised her position on key elements of the method by which the zapper operates. Zapping parasites does not directly affect the parasites themselves; instead, it acts positively upon the immune system, which then kills and eliminates the parasites.  An important point is that the method of action may be different from Dr. Clark's original ideas, but the end result is the same.

In other words, Dr. Clark has discovered that the zapper hyper-activates your own immune system which can then take out the trash. Although the zapper can be seen to electrocute and disrupt the functioning of some parasitic organisms in a petri dish, different principles apply when the same zapper current is applied to a person.


Do I need to select a particular frequency for a particular problem that I wish to address in my body?"

Dr. Clark's answer to that is simple: the zapper wakes up your own white blood cells, and they are well able to identify and destroy parasites, bacteria, viruses and fungi of all kinds using their inborn wisdom. No tuning is needed.

Any DC pulse generator needs an output frequency, or else it becomes a simple DC power source, like a battery.  Many people get the idea of tuning zapper frequencies for particular parasites from the tables of frequencies in the back of her book, The Cure for All Diseases. This table of frequencies was developed before she had discovered the zapper, and was required for destroying parasites and pathogens using tuned frequencies with an AC signal, NOT the DC pulses of a zapper. As she points out on pages 13 and 14 of The Cure for All Diseases, using these frequencies required two stages. First, the pathogen had to be identified by Syncrometer testing, and second, it had to be destroyed by applying the selected frequency for three minutes using an AC generator. This procedure could take many hours, and the results were often temporary and frustrating. The zapper is a much simpler, better way. I have asked Dr. Clark personally about the "zappers" which use frequency keys or tuning devices, and she told me that she does not use or recommend them.


Is the current that goes back and forth between the electrodes or hand cylinders (via the person holding the zapper) usually AC or DC?

 A Dr. Clark zapper must have only positive DC pulses between its output leads. She writes that even a tiny negative pulse can help sustain the life of a parasite. This consideration excludes all Bob Beck "blood purification" type devices, and many Rife devices as well.


How can the zapper electrocute parasites and yet leave the human body unharmed?

Zapping Isn't "Electrocution"  The short answer: when a parasite is inside the human body it is often shielded against electrocution. For example, the power required to kill embedded intestinal parasites through electrocution is greater than the power required to kill the host (in this case, the human body) and that is why we don't try to electrocute parasites when using the zapper.

Dr. Clark's research and thousands of testimonials have shown that the zapper effectively kills parasites. Clearly the zapper is a powerful tool, but it does not work as Dr. Hulda Clark initially hypothesized in 1995. It does not electrocute parasites at all.
In fact, the zapper works by a different mechanism entirely.  See above.

Does the Auto-Zap have negative pulses coming out?

No, none whatsoever. It fully meets Dr. Clark's specification for a "positively offset" DC signal. Every single Auto-Zap is tested on a digital oscilloscope to ensure correct output, with only positive pulses. I have tested two zappers from good manufacturers that had both positive and negative pulses. Dr. Clark says: "The maker must assure you that [the zapper] has been checked on an oscilloscope and not even 1% negative voltage found." This is important because "if the varying voltage becomes NEGATIVE, even momentarily, it supports and maintains [the parasites'] lives." (The Cure for HIV and AIDS, page 71)

As the designer, manufacturer and a professional engineer, I certify that there is never a negative voltage output from any Auto-Zap zapper, and that we verify this on a digital oscilloscope for every zapper we sell. Here is a typical Auto-Zap zapper output displayed on an oscilloscope. Note that the black "square wave" line never goes below the zero volt line (blue arrow):

Is it safe? Yes! Zappers have been used by hundreds of thousands of people of all ages for more than 15 years, with no harm reported. You may feel worse at the start as the parasites die off, but this is usually gone within ten days. Dr. Clark recommends against using the zapper during pregnancy, or if you have a pacemaker. To zap safely during pregnancy, use the "Leg Zapping" method described below. You may find that the benefits of zapper use make it a good choice in helping you and baby stay healthy. See the special "Leg Zapping" notes below for safely zapping with "smart pacemakers" and ICD's.

Are there specific frequencies that a typical zapper outputs?

From page 15 of The Cure for All Diseases, Dr. Clark specifies a frequency range of 10 Hz to 500,000 Hz for a zapper. The example circuit she gives operates at 30,000 Hz. Because of a physical phenomenon called the skin effect, I chose to give our Auto-Zap professional zapper an operating frequency of 2500 Hz. This lower frequency current will penetrate considerably deeper in the body, better energizing the blood flow in the deep large arteries and veins. It also works very well for powering zappicators, which are simple magnetic antennas which allow zapping substances like foods, which do not have an immune system.


How many volts and amps does a typical zapper output?

On page 15 of her book, The Cure for All Diseases, Dr. Clark summarizes the specifications for a zapper. She says it must have a DC output of 5 to 10 V. We can now calculate the maximum current output from the output resistance of the generating circuit. She uses a 1000 ohm resistor to limit the output current to safe and effective levels. With a maximum output of 5 to 10 V, this resistance gives us a maximum possible output current of 5 to 10 milliamps. In practice, the actual DC current delivered to the body is considerably lower than this, because of the extra resistance at the surface of the skin and in the body itself.

Is it safe to zap if I have a pacemaker?

Standard pacemakers are fine with the zapper. But modified "Leg Zapping" contact arrangements are needed for two new devices: Implantable Cardioverter Defibrillators (ICD's) and "smart pacemakers." These devices "listen" to the electrical signals put out by the heart muscles. When it detects a high-frequency signal above the normal "heart signal" range of 10-100 Hz, the ICD is set to interpret it as fibrillation, and to correct it by a massive jolt of electricity to restart and synchronize the fibrillating tissue. If an AC current of 1000 microamps or more (and even as low as 200 microamps in some cases) is applied to the torso, it may be detected and wrongly interpreted as fibrillation, with the resulting defibrillation signal jolting the heart muscle needlessly.

Even though Hulda Clark zappers always put out DC pulses, the induced currents may appear as AC inside the body to the ICD trigger detector, and can cause these unwanted defibrillation pulses. If you have an ICD, DO NOT USE A ZAPPER HAND TO HAND. USE THE "LEG ZAPPING" or "ARM ZAPPING" APPROACH BELOW to prevent current from entering the torso.

There are also new technology "smart pacemakers" like the Medtronics EnPulse that watch the heart's natural signal, intervening or "pacing" only when needed. They are unlikely to have a problem with the zapper current because they monitor the 10-100 Hz frequency band. However, if they do detect zapper current as a stimulus, they will produce a slow pacing signal that may interact with the heart's natural pacemaker output to give a surging sensation as the heart rate varies. In a small group, about 5% of users, it is possible that this slow pacing signal could cause a type of fast heartbeat that could cause serious problems.

The standard way to handle and assess these risks for "smart pacemaker" wearers is for the patient to bring the zapper to their cardiologist's office, and apply the zapper current in the usual way while monitoring the smart pacemaker's output via its built-in telemetry link to the doctor's computer readout. If there is a problem, it will show up clearly as arrhythmia or other abnormality. If no effect is observed, the doctor can then increase the trigger sensitivity of the implanted device with his remote programmer, and see how much safety margin exists for this patient before problems appear. If the zapper does not cause an effect with the sensitivity raised one increment from its programmed setting, it is regarded as having an adequate margin of safety, and may be safely used. In any case, you may use the "Leg Zapping" or Arm Zapping" methods below to safely enjoy the benefits of zapping.


Leg or Arm Zapping is a way to zap that will keep zapper current out of the torso of the body, including the heart. This will prevent possible problems with the new ICD and "smart pacemaker" devices, and with zapping during pregnancy. Dr. Clark says that the idea with zapping is to put the tiny zapper current through a maximum of blood flow, to energize the white blood cells efficiently. I believe the safest way for those with ICDs or "smart" pacemakers to zap effectively is to hold one handhold in your hand, and tuck the other handhold under the armpit on the same side, preferably the right arm. This causes the current to intersect the major blood flow of the large arm arteries. For leg zapping use a footpad on one foot, with a conductive band (or modified footpad) around the calf or thigh of the same leg to keep the zapper current out of the torso completely, while making the current intersect the major blood flow of the large leg arteries.


How often should I use the Auto-Zap zapper?

Dr. Clark recommends zapping at least one full 63-minute cycle daily for the first month, and at least twice a week after that. I myself use it every other day for maintenance. At her clinic she has patients zapping for eight hours a day. Our Auto-Zap instructions cover other application hints.


Where can I see the Auto-Zap5 zapper instructions?

Click here for full instructions with pictures.


How does the Auto-Zap compare to the others available?

Click here to see our exclusive Hulda Clark Zapper Comparison Chart. The Auto-Zap goes much farther than the circuit in Dr. Clark's books (which is in 95% of the zappers offered on the Web). I use and recommend the Auto-Zap zapper for these reasons:

  • - it has a fully automatic timer built in to do the 63 minute cycle as recommended by Dr. Clark

  • - the lower frequency penetrates deeper

  • - it gives over 500 hours of zapping on a single 9 volt alkaline battery: about 10 times longer than the competition (18 months if you use it one full cycle per day)

  • - it has a failsafe sensor LED light to show when you have good contact and proper connections

  • - it is ruggedly built with full protection against static electricity and reversed battery damage

  • - it has a beeper to tell you when it is turning the pulse output on and off (so you don't have to hold the hand-holds during the 21 minute rest periods)

  • - it has an automatic battery load test every time you turn it on

No other zapper offers all these features. We give a full 5 year warranty, with a three month 100% money back guarantee. And our price is right.


Do you supply wrist bands?

In the past, none have worked properly, so did not offer them. But NOW, we have personally developed an effective set of wristbands called Super Straps that come with the AutoZap5.

There are three problems with conventional wrist bands, which we have solved in our Super Straps:

1. Inadequate contact area: they contact best at the outer and inner edges of the wrist, not on the flat top and bottom areas. Handholds and foot pads give much larger contact area. Our new Super Straps overcome this problem by offering much wider contact area than any other wristband.

2. Inadequate contact pressure: the straps cannot press hard enough to firmly contact the top and bottom of the wrist, or they would cut off circulation to the hand. Super Straps compensate for this by tripling the surface area in contact with the skin.

3. Inadequate moisture to ensure good contact: it is very difficult to keep the wrist band contact area moist for the duration of the zapping session. Dr. Clark recommends keeping damp paper towel layers between skin and contact to prevent ions from being driven into the skin. This is very inconvenient to do with wrist bands. Our Super Straps use a special foam against the skin to retain water for good maintained contact.


What are foot pads?

Foot pads are a pair of contact plates about 3"x 12" made from aluminum kitchen foil or flat sheet metal (22-26 gauge). They are held by the copper alligator clips on the Auto-Zap wires. Fold a paper towel on top of each pad, then dampen them with about a teaspoon of warm water. Place your feet on top of the plates and hit the Start button. Foot pads work well as you use a computer, read or watch TV.

Dr. Clark endorses foot contacts: "Using foot electrodes helps greatly for both plate-zapping and regular zapping." (page 506, Cure for HIV and AIDS). We include simple instructions for making your own foot pads from aluminum kitchen foil. It only takes 30 seconds.


Do you supply footpads?

We do not supply foot pads with the Auto-Zap5 because they cost more to ship than to obtain at a local sheet metal shop. Use aluminum kitchen foil to test the concept, and for traveling.


Why does the Auto-Zap use 2.5 kHz when Dr. Clark's circuit produces 30kHz?

If you check the top of page 15 in Dr. Clark's books, you will see that the frequency range she gives for zapping is from 10Hz to 500,000Hz. So why the 2500Hz setting? Because it works better at 2.5 kHz (which is 2500 Hz or 2500 pulses per second). I confirmed this in October 1995 with Dr. Hulda Clark herself. The lower frequency allows deeper penetration of the current due to the "skin effect." (She told us that much of her testing in later years were done at 5kHz.)


What about AC adapters instead of batteries?

A friend wrote, "I am interested in your zapper, but I read another zapper info page and got confused. He claims that using an AC adaptor (and his power supply circuit) is better than using a battery. Help."

Dr. Clark is adamant about battery power for safety, and I agree. The higher output voltage is not an advantage either, according to Dr. Clark's research: she specifies 5 to 10 volts. On page 15 of her book, The Cure for All Diseases, Dr. Clark states:

"Subsequent testing showed it [the zapper effect] was not due to some unique design, or special wave form produced by the device. It was due to battery operation! Any positively offset frequency kills all bacteria, viruses and parasites simultaneously given sufficient voltage (5 to 10 volts), duration (seven minutes), and frequency (anything from 10 Hz to 500,000 Hz)."

I think the reason some like AC power is that it stops battery life complaints from customers. We took a different route. We made the Auto-Zap5 so efficient it goes a year and a half on two AA batteries if used one hour a day. With ZERO risk of AC shock! (The voltage convertor in the AutoZap5 guarantees just over 9 volts.


Should I still take the herbal parasite cleanse if I have an Auto-Zap5?

Dr. Clark would of course say "yes". You certainly may if you wish. The black walnut tincture is good for clearing your gut quickly. With the zapper alone it takes longer. If you have a serious concern, by all means take the herbs as well.


Are the kidney and liver cleanses safe if I'm zapping?



What does the price include?

We include the Auto-Zap5 generator unit with fresh AA batteriesy, sturdy industrial wires, instructions and custom straps.


Why are some "zappers" cheaper than the Auto-Zap5?

Because you get what you pay for. The Auto-Zap5 is a fail-safe, fully automatic, rugged, efficient unit with a 3 month 100% money-back guarantee, and no hidden restocking or "refurbishing" charges. It is a tested and guaranteed lifetime purchase, not a disposable.


Can you give me a list of ailments/detoxifying/general health maintenance for which this machine is suitable?

See Dr. Hulda Clark's book, "The Cure for All Diseases," for a full listing. Her basic conclusion is that the zapper is an excellent general tonic and prophylactic (preventative) tool.


Is the zapper like a Rife device?

No, the Rife "pad type" devices do not "zap". MOST do not put out DC pulses like a zapper. They work on the principle of bio-resonance, much like Hulda's early

What is the best time to zap?

 Sometimes I put the foot pads under my desk at the computer. If I am too busy in the day, I grab the hand holds as I go to sleep, and hit the Start button. Find a way that works well for you.


Will they let me through airport security with a zapper?

We always take our Auto-Zap zappers along on trips, and have never had a problem. You might want to put the unit in your checked bags, but I carry it on. Lyn and I find the aluminum foil footpads convenient for travel, as they are easy to pack and weigh almost nothing.


Can I use the zapper while taking antibiotics?

Yes, it does not conflict.


What is "plate zapping"?

Recently Dr. Hulda Clark has announced that the effect of the zapper can be intensified and targeted to specific parasites in specific organs by "plate zapping." A box with one or two metal plates on top is connected to the positive lead of the zapper, and slides of the parasite and target organ are placed on the plates. See the new "Prevention of All Cancers" and "Cure for HIV/AIDS" books for more details. You can make your own plate box as described in the HIV/AIDS book on page 517. See our SuperZappicator!


If a known pathogen was in a known body part, would it work better if the hand-holds were nearer that body part instead of hands?

It might. Dr. Clark's recent work suggests that the zapper effect can be intensified or localized by "plate zapping" - see above.


Do you recommend using damp paper towel around the hand holds, or to hold them as they are?

Yes, please wrap them as we instruct you. DO NOT hold the bare metal, as the electrical signal could drive metal ions into the skin. Always use at least two layers of paper towel.


Does it hurt to put the hand-holds on other parts of the body instead of using hands: is it as effective using it on arms, chest or abdomen, legs or feet?

The effect seems to be systemic via the bloodstream, but feel free to experiment. Try to get at least four square inches of solid contact area on each contact point to prevent skin irritation.


Do you give full instructions re frequencies used for each health problem?

The single frequency we use is all it takes. According to Dr. Hulda Clark's latest research, the zapper stimulates the bloodstream and immune system in a subtle way, enabling your own body to "take out the trash", including parasites, bacteria and most viruses. The pulses from the zapper do not electrocute anything, as they are a safe low-voltage and low-current signal.

Does it actually destroy malaria or merely 'stun' it for the body to remove normally?

See above. We have had many units in the tropics, and two doctors with a Big-Zap in India. Users say it has helped the body clear up and prevent malaria beautifully.


Does having metal anywhere in the body (such as crowns on one's teeth) affect the benefits of using the zapper?

No, because the zapper stimulates the bloodstream and immune system, according to Dr. Clark's research.


Are there any long-term side effects from long-term electrical current use on the body? One hears of clusters of child cancers in areas close to major power lines, for instance.

None have been observed or reported, as far as I know. Power line effects are due to high strength alternating magnetic fields, while the zapper uses very weak DC current pulses similar to natural nerve impulses. The Auto-Zap has been used successfully with tots as young as 1 month ( to deal with a nasty case of thrush in short order).

The shiny copper pipes that you hold onto tarnished quite quickly- is that normal? As well, how often should you replace them?

The handholds last indefinitely. The tarnish or darkening is harmless, and does not affect their effectiveness. You can remove it by soaking the pipes in a cup of warm vinegar with a teaspoon of salt in it. We never do that here, though.

What if the wire comes out of the plug that fits into the Auto-Zap box?

The wire is easy to re-attach without tools. Just unscrew the black plastic sleeve and slide it back up the wire. If you cannot see the silver-colored wire, cut back the black rubber insulation to expose about 3/4" of wire. Then twist the end of the wire together a bit and insert it through the hole in the middle of the metal part and out the side. Push the wire all the way in, and wrap the wire clockwise around the groove on the metal part. Then slide the plastic sleeve back over and screw it onto the metal plug as snugly as possible.



Dr. Clark's Copyright Notice:    "The Cure for all Diseases": Copyright 1995 by Hulda Regehr Clark, Ph.D., N.D. "The Cure for HIV and AIDS": Copyright 1993 by Hulda Regehr Clark, Ph.D., N.D. All rights reserved. Permission is hereby granted to make copies of any part of this document for non-commercial purposes provided the original copyright notice with the author's name is included. Published in the United States by New Century Press, 2232 Verus Street, Suite D, San Diego, CA. 92154     We provide this material for informational purposes only. We do not prescribe, diagnose, or make medical claims. Your results may vary. We do not offer or sell any medical devices. If you use the information in this site without the approval of a health professional, you prescribe for yourself, which remains your lawful right, but the author does not assume any responsibility. Except where otherwisw noted, the information on this page is authored and owned and by Arthur Doerksen, natural person, and is protected under the United Nations Universal Declaration of Human Rights and the Canadian Bill of Rights.

Please read full disclaimer here.  Any statements about a Hulda Clark "zapper", colon cleansing, alternative medicine, alternative cancer treatments, nutritional supplements, cancer and others topics are for information only. The Hulda Clark zapper is not recognized by the FDA.   







The Integrated Wellness System come all that you see here!



Every household should have at least 1 zapper!

NOTE:  Site owner has successfully implemented Dr. Clark's cancer protocols.  She has been trained on this equipment at Dr. Clark's clinic in Tijuana, Mexico.  Although Dr. Clark has never ENDORSED any product anywhere anytime, we know first hand that the AutoZap was suggested and used by her clients at the clinic.  (If they didn't already have one of their own.)

Please read full disclaimer here.  Any statements about a Hulda Clark "zapper", colon cleansing, alternative medicine, alternative cancer treatments, nutritional supplements, cancer and others topics are for information only. The Hulda Clark zapper is not recognized by the FDA.   




  EASY to use
  3.1 Mhz RF Carrier Wave (deep penetration)
  Highest frequency range (ALL Rife Freqs)
  9 Times Higher Output than others
  Runs Multiple Frequencies (up to 8)
  Generates Audio and Radio frequencies
  Runs Sine and Square waves
  Has other features that competitors do not
  Optional Amplifiers for even more Power
  Plasma Tube Broadcast available
This frequency generator is the most powerful, versatile, and complete device you'll find.

Closest thing to an actual Rife machine that exists, whether you prefer direct contact or broadcast method.

Email us for immediate complete details



Statements about Royal Rife, Rife machines, frequency generators, Dr. Clark zappers, etc. have not been reviewed by the FDA.