The site mentions "pulses" so perhaps they are doing something more
than just sinusoidal AC. Just because your DMM reads 440-660 on the
normal VAC scale doesn't tell you what the waveform is like.

Sean

On 5/29/07, Jinx <joecolquitt@clear.net.nz> wrote:
>
> > I have a farm type electric fence power supply that we use to keep
> > critters (deer, raccoons, etc.) out of our vegetable garden. It is 120
> > VAC 10 watt max input, and output is 440 - 660 VAC measured
> > with a DMM
>
> Isn't that really dangerous ? An electric fence is normally, IME, a
> pulsed affair, not constant high voltage. Do you hear any interference,
> like clicking, on an AM radio for example ?
>
> If it interests you, I have a commercial "hot fence" indicator. It's based
> on a 74HC04, powered by a coin cell. You hang it on the fence. There
> is no electrical contact. The HV pulse triggers the 74HC04 to blink a
> LED
>
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