William Jay Fogal's Charged Barrier Semiconductor

[TimFox]

To Xena:

Here is a diagram of two capacitor-coupling networks, connected in opposite polarity, between two L-C circuits.
The two circuits could be two perpendicular inductors L1 and L2 arranged for quadrature detection of the rotating magnetization in an MRI machine.
With perfect perpendicularity, the mutual inductance would be zero, but the two "H" circuits allow a capacitive coupling that goes from negative to positive by adjusting trimmer C8 in the variable network.
Each inductor is shown in a balanced resonant circuit feeding an appropriate amplifier, tuned by variable capacitors C1 (for L1) and C11 (for L2).

Each H network allows a single trimmer to adjust both effective capacitances between coil terminals.  The effective shunt capacitances of the H network are included in the resonating capacitors for each coil.

[Xena E]

To Xena:

Here is a diagram of two capacitor-coupling networks, connected in opposite polarity, between two L-C circuits.
The two circuits could be two perpendicular inductors L1 and L2 arranged for quadrature detection of the rotating magnetization in an MRI machine.
With perfect perpendicularity, the mutual inductance would be zero, but the two "H" circuits allow a capacitive coupling that goes from negative to positive by adjusting trimmer C8 in the variable network.
Each inductor is shown in a balanced resonant circuit feeding an appropriate amplifier, tuned by variable capacitors C1 (for L1) and C11 (for L2).
(Attachment Link)
Each H network allows a single trimmer to adjust both effective capacitances between coil terminals.  The effective shunt capacitances of the H network are included in the resonating capacitors for each coil.

Thanks for the trouble taken Tim, that has clarified it quite well, it's an inspired balancing technique. I have downloaded your circuit for a rare (for me!) Look at it in simulation... one for the notebook, with credit.
Good health.

[RoGeorge]

Rabbit ears:  if you start with two identical resonant circuits that are weakly coupled, the response is narrower than that of a single circuit.  When the coupling increases, the response goes from a single peak to a double-humped curve, with a local minimum at the original center frequency.
More interesting: start with two similar individually tuned circuits, and tune no. 1 to a lower frequency than no. 2.  With coupling, you will see two peaks very close to the original resonant frequencies.  Now, start slowly tuning no. 1 towards the frequency of no. 2.  You will see the lower peak increase in frequency, but not merge with no. 2.  Instead, as no. 1 approaches the second frequency, the higher-frequency peak starts moving away from the lower peak (the two peaks in your rabbit-ear curve).

About coupled resonant circuits, there are simulators that can attach sliders to components values, so to drag the sliders while live watching the circuit response, and thus to build an intuition.

The behavior of coupled resonators was quite an epiphany to me when TimFox (thank you!) told me something similar (some years ago, in a very different topic about an array of high Q resonators).  In fact, I was so impressed about the response of the coupled resonators that I even saved on YT this 1 minute video, about how the two peaks "push" each other when only one of the resonators is changed:

Line splitting in two coupled LC resonators and moving peaks - QucsStudio


This video might not cover all the aspects of coupled resonators behavior, so I highly encourage everybody to try the steps described by TimFox.  The live sliders are such a helpful feature.  Aside from QucsStudio, I've heard MicroCap (which is now free) can have sliders, too, but I don't know MicroCap.  Both simulators are for Windows, but they can be run from Linux, too (through WineHQ).

[TimFox]

I first examined that situation (decades ago), with a circuit similar to that shown above, at frequencies around 10 MHz.
I used a spectrum analyzer with a fast sweep time, driving coil 1 from the tracking generator and probing coil 2 with a high-Z active probe to the SA input.
Coil 1 was resonated with a conventional variable capacitor, and coil 2 with a fixed capacitor.  I saw the peaks chase each other while manually tuning the variable capacitor.

[Chet]

... The equivalent circuits (Y-delta) of these configurations ...

Somewhat, but not entirely similar to, delta configuration is the tetrahedral configuration which does away with any requirement for non-physical negative magnetic couplings of three coils.

[paul cotter]

 

[Chet]

I don't see the humor in making obstacles to achieving a "working model" less challenging to build.

[Gyro]

[Saving my breath]

[Electrodynamic]

It's fun to debate different concepts but I think Elon Musk has the right approach even if he is a dick.

If you think something can work then build it, make it work then charge all the misguided people who said it cannot be done an insane amount of money. Real capitalism is like a fee for not being the sharpest tool in the shed. All the people who claim it cannot be done pay while the people who make stuff work reap the rewards.

As the saying goes, “Debating with a fool is like wrestling with a pig in mud; after a while, you realize the pig is enjoying it”. Ergo, the only debate worth having is when we learn something new which moves our understanding and the application of it forward imo.

I also agree with another dick and Canadian by the name of Kevin O'Leary. O'Leary claimed Musk has a 100% signal to noise ratio and will not hire any engineer or scientist who brings nothing new to the table. So you have a PhD or years of experience?, it means fuck all when millions of other people are making real progress based on demonstrable results. We are judged on what we bring that is new to the table not the same old bs which anyone can read from a textbook. I can respect any person who is able to cut through the bs and say "tell me something everyone else doesn't know". Make it work by any means otherwise what good are you?.

In our age where the growth of knowledge is exponential those holding to the status quo are fools imo.

[SteveThackery]

As the saying goes, “Debating with a fool is like wrestling with a pig in mud; after a while, you realize the pig is enjoying it”.

How ironic that you should say that.....

[paul cotter]

FOLD UP SCHEMATIC.png (164.18 kB, 2229x1013 - viewed 15 times.)
Chet, just to be clear, it was your electronic origami that I was laughing at.