My AC/DC adapter is a universal 33011 output variable from 3 to 12 VDC, @ 500 mA with a polarity switch. My zapper was making good Cs with this adapter set on 12 VDC. The zapper just stopped doing its thing with the germs. Ear infections came back, ulcers remained, etc. DR Clark found that lifting the signal generator from ground by using a battery instead of a 110 VAC supply allowed for the generator to kill all germs instead of just the ones where the frequency was set. She said a person with 4 known sets of different germs had all 4 wiped out with the generator set for one of the 4 germs frequencies. Source for the adapter was a store called Walmart. I did not bother switching back to a battery for zapping.
A discussion on this list went into great detail on safety issues using an AC/DC adapter with a zapper. They did not cover saying that it caused the zapper to stop functioning properly. Brickey
