PS -- my colleague and I have built a complete replication from scratch, using all of our own components and instructions above, and found that the FINALLY-achieved parameters are much like Lawrence has advertised at OU for prototype A... That does not mean that I'm claiming overunity yet -- that will require many more tests as discussed above. But given some trial and error on the winding of the toroid (which Lawrence admits is more of an art at present than a science) -- given that, his design is first-order reproducible (based on RMS values). And not too difficult to build. Much easier than a Bedini motor, for example.
Thanks Prof for providing the LINK to the article and the circuit diagram. By the way, the efficiency of the circuit can be improved by placing a small capacitor across the 1,000 Ohm (1.0 K) base resistor. I've used various sizes from 0.001 uF to 0.1 uF. Experimenting with various sizes will reveal which is best for optimum performance. It doesn't seem to be hyper critical. It is also possible to "tune" the circuit by varying the resistance in the base circuit for enhanced efficiency. Each transistor used in the circuit will have a different "sweet spot" in accordance with its Beta (current gain.) Using a 10 Kohm (10,000 Ohm) variable resistance to be adjusted for maximum performance will enable this "tuning." Once found, the value can then be installed as a fixed resistance.
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