## ANALOG Meter Movements, or,
points in digital meters where 100-300
millivolts full scale is available

### Audio Sensing Add on for [Tri] Field Meters
plus Wiring Tips for Biosensing Connections
February 7, 2001

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      *** WORKS WITH ANALOG METERS AROUND 100-300 MILLIVOLTS FULL SCALE ***

    At date above, the below schematic is the first working prototype.  As with
    all experimental circuits, it is subject to change.

    The idea is that [Tri] Field Meters belonging to members of our group are
    probably sensitive enough to detect the small biological EMF field changes
    which occur in our bodies, as well as house plants and maybe pets, provided
    our attacks are delivered in "bursts" as opposed to slowly.  Some "burst"
    type attacks are:

    - sudden "electronic caffeine injections"
    - limb flailing
    - electric shock sensations
    - hot needles in the flesh sensations

    It may also be, but this is only theoretical at the moment, that continuous
    voice to skull could be detected in some way using an audio-sensing add on
    to a [Tri] Field Meter.

    In this application, the meter itself would probably be connected to a
    pickup coil.  A meter without a jack for antenna connection may need to be
    disassembled and an external coil with its axis parallel to an internal
    sensing coil may be needed.

    INSTALLING A JACK IN A TRI-FIELD METER (MUST BE ANALOG, NOT DIGITAL)

          !!!! DO NOT DRILL UNTIL YOU HAVE READ THIS SECTION !!!!

    ** Refer to "audmeter.gif" image above.

    First, an EXPERIENCED TECHNICIAN should do this.  Reason is, you are tapping
    the meter movement itself which can be wiped out by mistakenly feeding any
    voltage directly to the terminals.

    If you can find a convenient spot for a 1/8" MONO jack (MONO IS ESSENTIAL,
    AND SO IS OPEN-CIRCUIT) phone jack, first be sure there is no way an
    accidental contact can occur between the jack elements WITH PLUG PUSHED IN
    and wiring attached.

    The jack wiring must include a heat shrink tubing insulated 4.7 K
    (4,700 ohm) 1/4 watt or 1/8 watt resistor in the tip lead.

    Verify with an external ohm meter that the negative terminal on the meter
    movement connects to ground on the meter's case, if metal.  IF NOT, YOU
    MUST USE A SMALL, TIGHT-FITTING GROMMET AND BRING OUT A PIGTAIL WITH A
    1/8" MONO IN-LINE JACK.  A shielded lead is recommended, with the shielding
    connecting to the "ground" side of the jack.

    The tip lead must connect to the terminal on the meter movement marked
    "+".

    As a user, take care to never apply voltage to that jack or pigtail - the
    safety resistor will protect low voltages but can't be counted on to
    protect against all voltages.

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                    *** BIO-SENSING EXPERIMENT WIRING TIPS ***

    The above diagram is an arrangement for using any sensitive instrument
    such as an EEG or [Tri] Field Meter to detect electromagnetic disturbances
    of your body, your house plants, or pets, during psycho-electronic attacks.

    It is recommended that the SOLDERING be done by someone with experience,
    and that where wiring is anchored only by solder, silicone rubber support
    be added so the stranding is less likely to break.

    NOTE:  There is one excellent compromise instrument on the market, a good
    balance between sensitivity, cost, and features.  It is the "Tri Field
    Natural model meter", at this link:

    http://www.trifield.com/EMF_natural.com

    If that link is broken, try this one:

    tri-nat.htm

    The arrangement diagram above, though, applies to any instrument, and
    those Tri-Field meters which have no external jacks would need certain
    inside components connected to an outside jack in order to function in
    this way.

    >> Taped-on electrodes can be used, however, pickup coils are much easier
    to work with.  The arrangement drawing above would also apply to electrodes.
    Keep the potentiometer mounted in a pill vial, and connect the leads to
    a pair of silver (artificial silver is OK) coins with leads soldered to
    them.

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    The diagram above shows a system of quick disconnect, convenient and
    reliable pins and sockets for your pickup coil and accessory wiring.

    Again, if you are not experienced in soldering, it's best to have
    someone do the soldering and/or show you how.  (This is especially true
    for the internal wiring of the "potentiometer mounted in a pill vial"
    shown in the first diagram.  If the potentiometer is not properly
    wired, and the slider wire doesn't face toward the instrument, you may
    get no sensing or sensing with too much noise or signal strength.)

    These so-called "D-submini" pins can be crimped with an el-cheapo
    Radio Shack crimp tool, #276-1595, however, BECAUSE YOU WILL BE SOLDERING
    THE PINS ANYWAY, CRIMPING WITH NEEDLE NOSE PLIERS WILL WORK FINE ALSO.

    A small plastic (aluminum jaw covers) vise is very handy for making up
    instrumentation cables.

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    The image above shows how to make the in-line 10 K potentiometer used to
    control the signal level fed from your pickup coil to the measuring
    instrument.  This component is EXTREMELY important.  Without it, noise
    and signal overload problems are almost assured.

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