I don't know and I don't care what Hulda's Zapper does or doesn't do, but why do you (and Paul) bring up a relation between voltage and frequency?
Voltage and and frequency don't have much to do with each other, in this case. You can get almost any frequency, no matter how low or high, from almost any source of electrical energy. AC can be made from DC and vice versa, and an AC Voltage of any frequency can be boosted to a strength (amperage) that could be used for Zapping which, depending on the amperage, might be either allegedly healthy/beneficial or certainly unhealthy/deadly.
So what are you guys trying to do here? Bullshitting?
ps:
Ghee, I'd love to zap both of you with an almost empty 1.5 Volt battery at whatever Frequency you wish.
What? I am sorry, but in this case YOU are the IDIOT!
Geez, I only have a degree in electrical engineering.
The
POWER is GREATER if you have a frequency with a HIGHER VOLTAGE.
I built these neat little boxes when I was in elementary school. It was based off of a doorbell electro-magnetic setup, which cycled on and off at about 10-15 times per second. I would put it in a little box, with a 1.5 volt battery, and put a note on it "don't pick me up".
There was tin foil around the box, but TWO conductors, one coming from the barttery negative, and the other from the positive AFTER it ran through the doorbell.
People would get a BIG SHOCK. They didn't think it was funny, but I sure did!
Now, if you put a
9 volt battery in there (which I of course tried), WHAM, you got an even WORSE shock.
The doorbell made the current shut on and off at about 10-15 times per second. That turns the battery's DC voltage into alternating current (AC).
Now, home 120 volt AC current cycles on and off at about 60 times per second, but with 120 VOLTS. Try sticking a screw driver into each cobtact of a wall outlet, and hold onto each metal piece. You will notice a
big difference (I also tried THAT when I was a kid - I actually sort of "liked" the jolt . . . . :confused2

. I was always an "experimenter" - about many different things.
The point is that a frequency can have ANY voltage
pushing it, but a greater voltage will have more "strength". I am curious if anyone has tried zappers with different size potentials (voltages), and if it made any difference. I suppose you could build one that plugged into a wall, and had 120 volts zapping you at 30K! Aggggh!
Take a powerful laser. It is the "same light" as a light bulb emits, BUT it is focused and a great deal more VOLTAGE and POWER are behind it.