Quote from: conradelektro on January 13, 2014, 06:15:10 PM


The magic difference is still elusive. What is the magic difference or the magic effect (in understandable terms, I know about the Voltage between neighbouring wires and the difference in self capacitance)? How can the magic be measured (without exotic equipment)?

Who in this thread is claiming 'magic'? I didnt post the word magic. Did synchro state the word 'magic'?

Hmm, who else here used the word 'magic' in this thread? hmmm

Mags

@Magluvin,


                Here's the "Synchro Coil" Conradelektro tested, modified by Milehigh. They wonder why I'm furious with them!

Quote from: synchro1 on January 13, 2014, 09:12:08 PM
@Magluvin,


                Here's the "Synchro Coil" Conradelektro tested, modified by Milehigh. They wonder why I'm furious with them!

Hey Sync

Where is the diode and cap?  You have 2 resistors in parallel across the coil. Or is that the way they tested it?

Mags

Conrad:

Note that the patent was written in the 19th century.  It's possible that the word "electromagnet" was used in the title of the patent just so people, the patent examiners, could relate to it and have some frame of reference.  Think if in 1975 you wanted to patent the concept of the "smartphone."  People would not understand, the cell phone network did not exist and nobody imagined that you could have a computer in you pocket with a "Jetson's" display.  (A children's cartoon about a family living in the distant future where everything is automated and there are domestic robots and flying cars.)  So chances are your patent application in 1975 for a "smartphone" would be rejected because the patent examiners would have no frame of reference.  If you called it a "miniature walkie talkie with a miniature cathode ray TV tube" your patent might be granted.

People in the 19th century understood that there were "electromagnets" in telegraph machines and phone bell ringers but that's about it.  They had no concept or understanding of the term "inductance" and therefore had no frame of reference.   That's my theory.

The Tesla patent is akin to the patent for the transistor.  It's a piece of technology that all alone does not do much.  We know that you can do countless applications with transistors working in tandem with other components.  The question is can something analogous be said about the Tesla bifilar coil?  That's a key question.

With respect to the patent.  It says when the coil is excited at the resonance frequency, the self-inductance (i.e.; inductance) goes away and it simply will conduct the AC like the coil has "disappeared" and the only impedance that you see is the pure wire resistance.

If you look up "parallel LC circuit" and "series LC circuit" you will see that the parallel LC circuit has infinite impedance at the resonance frequency and the series LC circuit has zero impedance at the resonance frequency.

What that means is the assumption that we have been working with is that the capacitance inherent in the series bifilar coil is acting like a parallel LC circuit.  That's what your test shows when you see the maximum voltage across the coil in series with a resistor.

The interesting thing is that Tesla's patent models the coil as a series LC circuit.  i.e.; when you make the measurement of the voltage across the coil in series with a resistor you should measure zero.

So it's interesting that apparently nobody (that I am aware of around here) has been able to actually confirm what the patent says by testing an inductor.  That doesn't mean it can't be done.  I think that it's fair to say that discovering a frequency where the inductor acts like a series LC circuit is possible, but elusive and difficult.

So possibly right now on this forum nobody has successfully replicated the patent!  People have replicated and observed parallel LC resonant behaviour in their series bifilar coils but they haven't replicated and observed series LC resonant behaviour in their series bifilar coils.

MileHigh

Conrad:

I just watched your clip.  So the strength of the magnetic field generated by both types of coils is the same.

Now we all recall Synchro1 stating that the electromagnet test where he picks up paperclips would show that the bifilar coil would outperform the regular coil.  There were a lot of big boasts and grandiose claims. That test was also a DC test.  The test you did in your clip was essentially the same test.

The idea of starting with learning and verifying basic concepts and then building up from there is a fundamental technique for learning, and it applies to electronics also.

Congratulations on a great test.  This was a test with fine granularity in measuring the strength of the magnetic field.  That's in contrast to the paperclip test that was very rough in granularity, too rough to generate any serious data.

MileHigh

P.S.:  It looks like you have a real bench power supply.  You have two knobs, one for current and one for voltage.  That means that the power supply can act as a voltage source, or also as a current source.

To configure the power supply as a current source, turn the current knob all the way counter-clockwise to zero.  Connect the coil to the power supply, and also put a multimeter in series set to display current measurement.  You do not need a series resistor.  Then turn the voltage knob all the way clockwise to the maximum.

Then slowly turn up the current knob and observe how you can control the amount of current that flows through the coil.  It's as simple as that.  Careful if you open the circuit the power supply in current mode the voltage will jump to the maximum.  Note that means in theory to turn a current source power supply "off" you put a short circuit across the terminals.