sensitive detection of electric fields

I previously posted about using a phono-preamp to detect electric fields.

I recently have begun using a Behringer Acoustic guitar amp for
the same purpose. It is model ADI21. It has higher impedance
and useful tone controls. For best results I listen with headphones
through a Fiio headphone amplifier.

For an antenna I am using an old set of TV "rabbit ears", about 2 ft long.
Beware the connector on the end may have a filter across it, so I had
to disconnect that connector.

With this I can detect about half a millivolt. A shark can detect a lot
less,
but I think this is a relevant range for us, 0.001 volts per meter.
The electric field detectors I know of go down to 10 V/m, or 1 V/m, maybe
0.1 V/m.

If you have good headphones that go down to 60 Hz, you can tell the
fundamental from the harmonics. In my bedroom with the kill switch off, the
fundamental is not
audible, but the harmonics are. Putting the "Ex-static" fabric on the bed
does
eliminate fields in the plane of the bed at the surface.

I certainly would be interested to know if some who have tried "Faraday
cages" and
felt worse might still detect 60 Hz fields with this arrangement. If the
cage had a
floor and a ceiling and no electricity inside, then there won't be an
electric field.
But if just the walls are treated (as in my bedroom) there can still be
electric fields.
I'm considering putting a wire around the bed and connecting to the wall, or
trying to put a ground rod in a strategic place. But I'm also finally ready
to
work on an isolated ground system (with some kind of latching safety relay)
which
might also solve the problem...

I will add that I got some Ultrasone headphones that claim to reduce
magnetic
fields by 99%. They do! The bad news, my old headphones had many
milligauss,
and though these new ones are down below .2 milligauss at the ear, I can
still
listen to the music by putting a magnetic pickup a couple inches away. Many
places I go I'm getting more than .2 mG, but not all over the audio spectrum
and
synchronized with music, which worries me in terms of tinnitus. So,
a vast improvement, but if they really want to capture the electrosensitive
market,
they should try to do better.


[Non-text portions of this message have been removed]

Hello Bill,

I use the EMP Spion.
With its special antennas.

See: http://www.minderstraling.nl/Pagina040.html

With it, I can measure an electronic waxine light as well as a heat consumption meter.
The special headphone gives also more details.

Greetings,
Charles Claessens
member Verband Baubiologie
www.milieuziektes.nl
www.milieuziektes.be
www.hetbitje.nl
checked by Norton


----- Original Message -----
From: Bill Bruno
To: [hidden email]
Cc: [hidden email]
Sent: Sunday, July 04, 2010 10:56 PM
Subject: [eSens] sensitive detection of electric fields


I previously posted about using a phono-preamp to detect electric fields.

I recently have begun using a Behringer Acoustic guitar amp for
the same purpose. It is model ADI21. It has higher impedance
and useful tone controls. For best results I listen with headphones
through a Fiio headphone amplifier.

For an antenna I am using an old set of TV "rabbit ears", about 2 ft long.
Beware the connector on the end may have a filter across it, so I had
to disconnect that connector.

With this I can detect about half a millivolt. A shark can detect a lot
less,
but I think this is a relevant range for us, 0.001 volts per meter.
The electric field detectors I know of go down to 10 V/m, or 1 V/m, maybe
0.1 V/m.

If you have good headphones that go down to 60 Hz, you can tell the
fundamental from the harmonics. In my bedroom with the kill switch off, the
fundamental is not
audible, but the harmonics are. Putting the "Ex-static" fabric on the bed
does
eliminate fields in the plane of the bed at the surface.

I certainly would be interested to know if some who have tried "Faraday
cages" and
felt worse might still detect 60 Hz fields with this arrangement. If the
cage had a
floor and a ceiling and no electricity inside, then there won't be an
electric field.
But if just the walls are treated (as in my bedroom) there can still be
electric fields.
I'm considering putting a wire around the bed and connecting to the wall, or
trying to put a ground rod in a strategic place. But I'm also finally ready
to
work on an isolated ground system (with some kind of latching safety relay)
which
might also solve the problem...

I will add that I got some Ultrasone headphones that claim to reduce
magnetic
fields by 99%. They do! The bad news, my old headphones had many
milligauss,
and though these new ones are down below .2 milligauss at the ear, I can
still
listen to the music by putting a magnetic pickup a couple inches away. Many
places I go I'm getting more than .2 mG, but not all over the audio spectrum
and
synchronized with music, which worries me in terms of tinnitus. So,
a vast improvement, but if they really want to capture the electrosensitive
market,
they should try to do better.


[Non-text portions of this message have been removed]



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