There have been articles in some older electronics magazines about 20 years ago
on building your own EMF detector. It is a simple inductive pickup, hi gain
amplifier and meter indicator. A discarded tape recorder magnetic pickup head and
a single opamp in high gain configuration with a meter display will give a good
relative indication. I have placed my unit on the dash of my car and have driven
around the neighborhood when there was a power outage and was able to tell where
the line fuse was open. This helped the power company isolate the line fuse. Just
driving through any city will show some huge surges of EMF bombarding us on a
regular basis.

I haven't seen one commercially available recently except for the few I bought
some years back at a hamfest ( electronics fleamarket). The ones I have will also
read microwave leakage too. Wall warts are great generators of EMF as indicated
in the link below.
http://www.pic101.com/downloads/emfmeter.jpg
Rick

mark@MBCC.CO.UK wrote:

> > statistical test case. Doing a sweep of your home with an EM field meter is
> > easy and may suggest some easy precautions you may wish to take in other
> > areas).
>
> Where do I get (or how do I build) a cheap EM field meter?
>
> Regards,
> Mark Brown

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