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Space Energy Test?
Figure (1): Coil Energy Test
Scope: 500k input, gain set at 250V F.S. Coil: Using winding from a [?] 0 Henry chokecoil; 6K ohm resistance; 1-1/4" square with 3/4" square opening.
(1) When switch, SW, is closed, the current from battey, B, will "flow" through coil, L, and set up a "stored flux", i.e., H-field in space.
(2) When SW is opened again, the "stored" H-field flux plus some g-field flux will sum as a return "flow" through coil L. This much higher flux will develop a higher voltage and current in the load which is the scope input impedance.
(1) The dc power "consumed" in "charging" the coil magnetic field will be largely the battery voltage driving a current in the load which will be largely the coil resistance. Thus I ~ E/R ~ 9 / 6 x 103 ~ 1.5 mA. Therefore power ~ EI ~ 9 x 1.5 x 10-3 ~ 13.5 mW.
(2) The measured scope peak return pulse voltage was aproximately full scale on the scope or 250 volts. The pulse currents is now largely limited by the scope input resistance. Thus, I ~ E / R ~ 250 / 5 x 105~ 0.5 mA; therefore, Power ~ 250 x 0.5 ~ 125 mW. Therefore, the coil pulse power gain ~ 125 / 13.5 ~ 9.3 times, assuming similar time constants for the "charge" and "discharge" cycles.
While this is but a crude test, the indications are that coils should be able to "extract" energy, in this case possibly the earth's gravity field.