During the build of my Clark Zapper, the internet provided me information on a Dr. Bob Beck Zapper. This unit gives a 27 V, 2.5kHz signal and is used for electrification of the blood stream. Powered by three 9V batteries made the use of a somewhat large containment imminent.
The information can be found on https://www.sharinghealth.com/.

This unit has the circuitry to make Colloidal silver.

Blood zapping should be done where the bloodstream is the closest to the skin. The inside wrist is a good spot to do so. A special conductor band was required with copper strips.

A complete cycle should take one hour. The theory is that it takes about an hour for all the blood to reach those veins.

After a bit more research I found a drawing of a circuit for one 9V battery, but almost the same output voltage. This circuit can be contained in a small box. It was found on
https://www.curezone.org/forums/am.asp?i=1443104 .

Above is the drawing I created and can be downloaded as a PDF.
Installed in a small 3D printed box made it a good addition to my zapper collection.