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Analysis of the MEG-2 pix

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  • davidj95650
    The pictures of MEG-2 appear to show that the device is built on a core similar to the Honeywell AMCC-1000. The coil forms are now 3/16-inch plexiglas, which
    Message 1 of 1 , Apr 23 9:00 AM
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      The pictures of MEG-2 appear to show that the device is built on
      a core similar to the Honeywell AMCC-1000. The coil forms are now
      3/16-inch plexiglas, which provides better high-voltage insulation
      than the punched board used previously, and makes it easier for an
      observer to see how the output coils are wound. IMO the 2-pin devices
      connected to both the battery lead and the output coils are precision
      resistors in a TO-220 package (makes for easier mounting). The size
      of the wire on the output coil marked "Y" appears to be #18 gauge.
      The rectifiers connecting between the output coils and the output
      capacitors appear to be similar to International-Rectifier's
      "HexFred" devices, which are high-speed, high-voltage rectifiers.
      The two resistors connected to the output filter capacitors are
      10-watt packages normally mounted to a heat-sink. They are probably
      (as Stan has pointed out) used to reduce the surge current when the
      device is turned on and also to balance the load between both output
      coils. IMO the two capacitors are connected in parallel and are
      driving four 100-watt, 120-volt light bulbs mounted on what looks
      like a light fixture normally mounted over a bathroom mirror.
      The capacitors appear to be the size of units that have a capacity of
      10,000 uF and a voltage rating of 450 volts.

      Battery #8 probably is providing 12 volts to the controller
      circuit while batteries 1, 2, and 5 are providing the power to
      the drive coils.

      The device is operating at a frequency of about 14.7 kHz, with an
      input power of 147 watts (33.19 volts at 4.3 amps) and if both output
      coils are delivering similar power levels, an output power of 460 watts
      (2 times 500 volts at 0.46 amps). The 'scope pictures show an output
      voltage of about 500 volts, which would be just right for driving four
      120-volt light bulbs.

      Several things are puzzling: there are "N" and "S" marks on the core
      with "S" on the top near the drive-coils, which is the opposite of the
      polarity stated in the patent. Also, the device is battery powered, and
      the 'scopes are powered by plug-in modules isolating them from the power
      lines and ground. The size of the output capacitors is far in excess of
      what is required for a switching power supply of this type. There is a
      fan providing cooling air to the heat-sinks supporting the MOSFET driver
      transistors. For an efficient switching circuit, the efficiency would
      be better than 95%, meaning that about 7 watts of heat might be generated
      in the driver transistors when operating at the levels shown here.
      Clearly, this build-up is dissipating more heat than that, or the fan
      would not be needed (the pictured heat-sinks are good for at least 10
      watts of heat dissipation each).

      Is it possible, that for a successful replication, the device must be
      isolated from earth ground and to capture the output power usefully,
      large capacitors, with a lot of internal charge (and dipolarity), must
      be used ?

      It would be a hoot if all the experimenters who have built MEGs might
      have been successful if they had simply used batteries !!!
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