The Dr. Clark Research Assn is an
authorized website featuring Clark recommended products and regimens.
The Self-Health Resource Center also
sells Clark-certified products and contains a lot of information on her
The Zapper Guy, formerly known as Ten Dollar Zapper, makes a number of inexpensive but high quality zappers, including a much recommended three frequency unit. They originally builts a tiny zapper integrated into the cabling for the smallest zapper possible.
The Super RAVO Zapper is built in Czechoslovakia
and is more of a function generator with built-in programs for a number of common maladies, with one of them a programmed Clark cycle. Very user friendly and with adjustable voltage (5-15v), timing cycles, and other parameters, it is a large rechargable unit with an optional plasma tube unit.
The main website is in Czech language.
Sota Instruments once sold the most advanced and cost-effective
zappers, but with government pressure, they stopped. However, they still do sell other advanced bioelectronic devices.
HuldaClark.com's commercial arm has zappers and other supplies for sale, and also has
links to the new Plate
Zapping technique. The schematic of her basic zapper and the
easy-to-follow construction instructions are available here, too.
Richard Loyd describes
how to build a zapper which keeps the wave square while being used, which
may increase effects.
Zapper Plans has plans
for a zapper which uses a CD4069 hex inverter instead of a 555 timer.
There are no claims regarding effectiveness of this design versus a regular
zapper. The boards are offered for sale premade for $10 which includes
shipping, so with adding a case, handholds, and such and the price is still
below $20 (although there is no on/off switch, so removing
the battery would be necessary unless one was added.