The original Hulda Clark Zapper circuit was designed with 2 properties in mind. First it needed to be affordable for the average person. Second, it had to output a square wave. Other important factors were ignored. As a result,

The original Hulda Clark Zapper was built with an output frequency of about 30 kilohertz, but testing has shown that an improved frequency of 2.5 kilohertz is more effective in almost all cases. The Chinese have also patented a lower frequency model. There are many versions of the Hulda Clark Zapper available, it is important that the model you choose has the 2.5 kHz frequency available. Having both frequencies is better. Why both frequencies? They both have different frequency spectra.

The Wrist Straps sold with many Hulda Clark zappers are worthless. These straps and cords while being convenient, are made for antistatic applications and include a high resistance (1 megohm). This steals most of the voltage that the zapper puts out and makes it much less effective, especially those with coiled cords. Also, the copper handheld paddles provide lower resistance and better contact area, providing a better signal. Be sure that you get the full effect of your zapper by using the hand held paddles. If you do use wrist bands, be sure that they have a metal contact area, not some material embedded in the band itself. Also, some users have complained of wrist burns when using the wrist straps.

There are 2 types of Foot Pads available with some models of zappers . Some supply substitute foot pads that take the place of copper hand holds. These are OK, but they lack a big advantage that Augmentation foot pads offer. The augmentation foot pads provide a better signal by working with the copper paddles to provide multiple sources of signal to the body. This means that your entire body gets a full strength signal, not just the arms.

All Zappers produce a square wave output. This square wave is composed of all odd harmonics of the main frequency. These harmonics effectively stretch up into the megahertz range, which is where parasites are affected. The 30 kHz frequency produces a range of frequencies that are 60 kHz apart. This means that the output can miss a parasites frequency by 30 kHz. The 2.5 kHz range produces harmonics that are 2.5 kHz apart which will be closer to many parasite frequencies. However, because each harmonic is weaker than the previous, The lower base frequency produces much smaller amplitudes than the 30 kHz units at any given frequency. This is part of why the dual frequencies are important.

How does the Zapper work? According to information available from the study of "Radionics", bacteria such as anthrax, chlamidia, shigella, and e. choli have spectral responses between 392 and 398 kHz. This would be near the 13^th harmonic of 30 kHz, and near the 157^th and 159^th harmonic of 2.5 kHz. The 13^th harmonic has an amplitude of 1/13^th of the main frequency and the 157^th harmonic has an amplitude of 1/157^th of the main frequency. The tradeoff of amplitude vs. closeness to the needed frequency has to be weighed in considering desired results.

Some believed that the higher the frequency, the greater the skin effect. That is higher frequencies tend to travel along the surfaces of the body and lower frequencies tend to penetrate better. For this reason, many believe that the lower frequencies are more effective against intestinal parasites, urinary infections, ibs, irritable bowel syndrome, and other infections that tend to occur in the various body cavities.

The Image to the left illustrates how 30 kHz harmonics may hit 1 parasite but miss another while the weaker 2.5 kHz can get closer to each parasites frequency.

It might just be that the 30kHz frequency does not produce harmonics close enough to the parasite's frequency since its harmonics are 30 kHz apart while the lower frequency has harmonics that are only 2.5 kHz apart. Regardless of the reason, many users feel that the 2.5 kHz frequency is more effective.

How is the Zapper used? The Zapper is easy to use. It is provided with two hand held "paddles" one of which is held in each hand while the Zapper is running. The Power switch is turned on and zapping continues for 5 to 7 minutes. The unit is then turned off for 20 to 30 minutes. The process is then repeated for another 5 to 7 minutes. The cycle is the repeated a third time. It is recommended that the process be repeated once daily to prevent reinfection.

Are there any side effects? Yes, extensive zapping can kill beneficial bacteria in the intestine causing intestinal irregularity. Intestinal regularity can be restored by eating yogurt and drinking buttermilk.

Is one brand of Hulda Clark zapper better than another? Yes! Some zappers have a stronger output. Some zappers use less power from the battery thereby making the battery last longer. Some have a low battery indicator. Some cycle on and off automatically. Otherwise, most zappers perform the same function, that is outputting a square wave signal at some frequency and with voltage of 6 to 9 volts. A lower frequency of 2.5 kilohertz is probably better as discussed above.

How much does it cost? You can buy the parts from Radio Shack and build your own for about $40.00 see Schematic.