Magnet coil cores, demagnetization power and Lenz delay.

[synchro1]

The measured correspondence between ferrite core flux and Ohmic resistance is very pronounced. Very small changes in flux density have an imediate and amplified effect on changes in Ohmic resistance measurements in high pearmeability ferrite. Any DMM can easily get a large reading. 

Precise timing for DLE is critical. The increase in magnet rotor acceleration from DLE raises the flux density of the core and throws the timing off by lengthening the delay. The "Levitator" circuitry reduces core flux density and restores the balance so the phase lag is retarded sufficiently to sustain acceleration from the output coil alone.

[NoBull]

The measured correspondence between ferrite core flux and Ohmic resistance is very pronounced. Very small changes in flux density have an imediate and amplified effect on changes in Ohmic resistance measurements in high pearmeability ferrite. Any DMM can easily get a large reading. 

Please let us know what ferrite material you are referring to.
There are many different kinds of ferrites out there, with different conductivities, different permeabilities, saturation points, remanences, hysteresis losses and even different colors!

[synchro1]

Please let us know what ferrite material you are referring to.
There are many different kinds of ferrites out there, with different conductivities, different permeabilities, saturation points, remanences, hysteresis losses and even different colors!

@NoBull,

Here's a link to a supplier: This is the ferrite rod Lasersaber used for his Joule Ringer "3". This Ferrite Rod has a permeability rating of 1000. A real miracle material! This is the one I ran the Flux Density Ohmic resistance tests on. Another one of it's "Super Properties". We'd need to cut it into four 2" plugs for the coil cores, or any size to suit.

http://www.ebay.com/itm/8-by-5-8-625-ferrite-rod-good-for-hf-balun-/280918638410?pt=US_Ham_Radio_Amplifiers&hash=item41680e3f4a

[synchro1]

We need to first raise the flux density of the ferrite coil core to a mean density level externally. Only then can we contol it. The core alone only has a floor. There's no way to reduce it! Once we establish a supplied level with magnets, then we have adjustment latitude for a balance range.

[synchro1]

This link takes you to the Aeroelectric web site. You need to type Ohm meter in the google search engine, then click on the link to get the PDF. This is a booster pack that adds power to a DMM:

www.aeroelectric.com/.../LowOhmsAdapter_3.pdf

The key to interfacing the boosted DMM readout to the Op Amp is the "Zener Diode".