The original design at 150KHz used a hearing aid battery
and lasted for over 40 hours of operation.
Moving up just to 3MHz, the battery suddenly became one of
those $20 camera batteries, lasted only 20 hours, and
radiating power was now measureable...got caught between
just under the radar for energy transmitted - IT COULD NOW
BE SEEN AT 10 M.
Result: Project failed.
Now back at 150KHz, worked great, battery friendly,
couldn't even see the energy, so why couldn't we use that
spectrum? Because, by definition, not allowed to.
- Robert -
On Mon, 11 Jul 2005 21:40:44 -0700
"Brent DeWitt" <[email protected]> wrote:
> Nope, just the wrong frequency. Aim for one of the ISM
> bands.
>
> Regards,
>
> Brent DeWitt
>
> > -----Original Message-----
> > From: [email protected]
> [mailto:[email protected]]On Behalf
> > Of Robert A. Macy
> > Sent: Monday, July 11, 2005 4:03 PM
> > To: [email protected]
> > Cc: [email protected]
> > Subject: Re: Radiated emission measurement below 30MHz
> >
> >
> > Is this allowed?
> >
> > It was my understanding that one of my clients tried to
> get
> > a *very* low power intentianal "radiator" [at these
> > frequencies, radiator is a euphemism] through Europe
> and
> > due to some application there, couldn't even start
> although
> > the power could not even be measured within 10 meters.
> > Seriously, there was NOTHING at 10 m. They saw
> > "intentional radiator" 150KHz, and said NO.
> >
> > Did we use the wrong people?
> >
> > - Robert -
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