Resonant inductive coupling or magnetic phase synchronous coupling is a phenomenon with inductive coupling where the coupling becomes stronger when the "secondary" (load-bearing) side of the loosely coupled coil resonates. A resonant transformer of this type is often used in analog circuitry as a bandpass filter. Resonant inductive coupling is also used in wireless power systems for portable computers, phones, and vehicles. wikipedia
A very good modern example of the principle we have been discussing—in a limited, completely conventional form.
Resonant inductive coupling uses two resonant electrical systems tuned to the same frequency. When the transmitter drives its resonator, energy is repeatedly added in phase to the oscillation. The receiving resonator, because it is tuned to essentially the same natural frequency, preferentially accepts that energy through the coupled magnetic field. Your SVPwiki page aptly calls it “magnetic phase synchronous coupling.”
The famous MIT demonstration in 2007 made the point experimentally. Using two self-resonant coils, the researchers transmitted 60 watts over more than 2 meters at about 40% efficiency, with the distance being several times the coil radius. Their analysis treated the system as strongly coupled resonators rather than ordinary close-range transformer action.
That is very close to your bathtub and swing examples at the fundamental level:
Impulse at the wrong phase → opposition or poor transfer.
Impulse at the right phase → constructive addition.
Repeated correctly phased impulses → increasing stored oscillatory energy until losses and load balance the input.
In an electrical resonator, energy oscillates between the capacitor's electric field and the inductor's magnetic field. A periodic source timed to that natural oscillation replenishes losses and can build the stored energy over successive cycles. A second resonator tuned to the same frequency provides a preferred pathway for transferring part of that oscillatory energy.
Modern engineering confirms that resonance can dramatically improve power transfer even when ordinary inductive coupling would be weak. The important factors are resonant frequency, coupling coefficient, coil Q, impedance matching, geometry, distance, alignment and load.
And this technology is no longer just an MIT laboratory curiosity. Resonant magnetic coupling is being investigated and deployed in wireless charging, electric vehicles, sensors and biomedical electronics. A 2026 review, for example, describes resonant inductive coupling as a practical wireless-power strategy for implanted and wearable bioelectronics.
But there is one very useful boundary to preserve.
Modern resonant inductive coupling demonstrates the coupling mechanism. It does not demonstrate Moray's claimed energy source.
In the MIT arrangement:
wall/source power → transmitter resonator → resonant magnetic coupling → receiver resonator → load.
The energy source is known and measurable.
Moray's proposed arrangement was conceptually:
environmental/universal oscillatory energy → tuned resonator → synchronous accumulation → rectification/routing → load.
So what conventional engineering has demonstrated is an important piece of Moray's proposed mechanism: a resonant receiver can selectively couple to an oscillatory field and accumulate useful energy from repeated coherent excitation.
What has not thereby been demonstrated is that there exists a usable ambient energetic field of the type Moray proposed, from which substantial net power can be continuously extracted.
That distinction actually makes the comparison stronger rather than weaker.
This connects directly with Keely
Look at the common architecture:
Keely: sympathetic relation established between tuned systems → energy communicated through sympathetic streams.
Tesla: attach machinery to the energetic “wheelwork of nature.”
Moray: tune a receiver into synchronous resonance with external oscillations and progressively build usable oscillatory energy.
Modern resonant inductive coupling: tune two resonators into synchronous magnetic interaction and efficiently communicate power between them.
The first three make progressively larger claims about what the external source is. Modern wireless-power engineering demonstrates beyond question that the resonant coupling portion of the architecture is physically real.
That may be a very important distinction for Volume 78. We should probably stop thinking about “Sympathetic Streams” merely as mysterious streams of energy and consider another possibility:
A sympathetic stream may describe an established channel of energetic communication created by concordant conditions between oscillating systems.
In other words, perhaps the “stream” does not exist independently like water in a pipe. It may be the effective transfer pathway that appears when two systems become sympathetically related.
That would fit beautifully with Keely's persistent insistence on graduation, concordance, tuning, chords, neutral centers and sympathetic association. Without the relationship, little transfer occurs. Establish the relationship, and an energetic pathway becomes effective.
And modern resonant inductive coupling gives us a very tangible laboratory-scale example of exactly that general principle. [ChatGPT, 9/21/26]
See Also