The Tom Bearden

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Date: Mon, 8 Sep 2003 21:42:01 -0500
Dear Jim,
The only thing I can discuss of the MEG is the theory of its operation.  Actual construction of the MEG that we use, is still held "Company confidential".
But I do wish you well in your research efforts.  My best tip is to forget so much about the flux switching, and concentrate on the Aharonov-Bohm effect.
Best wishes,
Tom Bearden

Hi, Tom:
I've gotten back to work on my MEG project and suspect a "core saturation" problem due to the neodymium PM that I'm using.  It is a 1" x 2" x 1.375" (No. to So.) magnet that has a reported flux of 5350 gauss.  I'm unsure whether this number is per square inch, as cited in some literature, or per square cm., as cited elsewhere.  If it is the second, the total gauss level is 69,000, or 6.9 tesla.  The literature for the Powerlite Core that I'm using states that 1.6 tesla is its saturation level.  If you would straighten me out on this I'd be grateful.               
I'm driving the MEG with a pulse generator built as shown on the Naudin Website, using two 18 turn input coils, and four output coils, two with 40 turns and two with 200 turns.  I've found that the output power reaches a maximum and nearly equals the input power if I load these outputs with 720 and 18,000 ohm carbon resistors, respectively, and is in the range of 5.5 watts per output coil.  I've also found that I get about 10 % more output at an operating frequency of about 50 khz.
With 24.5 watts input, and allowing 1.5 watts for the pulse generator, the input to each of the two input coils is about 11.5 watts at 25.3 volts, for a driving current of about 0.45 amperes, and an ampere-turns product of 8.  I cannot imagine that this drive could appreciably affect the core saturation, but can see where, if the core is totally swamped, there'd be no possibility of the PM flux being switched.  Despite this, I still seem to have an efficient multiple input/output transformer.
I hope you can comment on this without running afoul your "Confidentiality Agreement".
I also hope you are well and that your MEG project is moving along. 
I'd love to trade in my woodstove for a 2.5 kw MEG for this winter.  My woodpile is running low and the price of electricity seems destined to climb.