How to find the resonance frequency and the wave characteristic associated to it

In this short life event I will perform a basic test to look for resonance in an air coil and how we know it is the fundamental frequency. A further demonstration is how to achieve that efficient which will provide us a with a rule of thumb for any coil system. At the end of the presentation I will answer in a Q&A fashion questions you might have and can do some adjustments to testings for you

[shawncalderon]

Great experiment! I have learned so much!

[HHHHHH-xbwr]

Wow it's amazing. It so good I like it

[realestate-miami-homes-condos]

Great video Thomas. I was out for a long time with my experiments. But I will start soon...

[michaelperrone]

A good introduction to resonances and harmonics! Sorry I missed it as I would have had some questions and pointed out some interesting properties of air coils. Have you by chance heard of magnetoelectric materials? They have interesting properties for parametric pumping in the MHz range. I would be willing to send you a bismuth ferrite core to test; I have been working on fabricating my own as well. I would also be interested to see how ferrofluid compares to metglas. I assume the losses will be larger because the ferrofluid will stir during operation. It is possible instead to add superparamagnetic nanoparticles to epoxy to create a reasonable metglas alternative - perhaps even better due to lower resistive losses. Once you have such a composite, look up the neel relaxation time of the nanoparticles and resonate your coil around those frequencies, being careful not to fully saturate the core. I have my result for this experiment already; I am curious to see if you can also get this result. Hint: you may need a high or low pass filter to remove a new signal from the resonant system

[akosv]

I hope this message finds you. I have some questions. I will give a long scramble of text to explain my struggle here. I have checked around a lot of books and webpages about electromagnetism and circuit theory but in a lots of cases didn't find satisfactory answers. Especially with so much abstractions and viewpoints, there are contradictory answers too. First of all, thank you for the excellent and understandable demonstration.
My question is how should I think about affecting the electrical length of LC circuits by shorting a capacitor at the terminals? If any (electrically short or long) coil design can have the same fundamental by changing capacitance, then why should we bother with matching quarter/full wave length with wire and so on? I kind of understand it can be a better resonance energy response-vise if there is "more coil" and less capacitance, since the antenna itself IS the capacitor and voltage should terminate there of course. Of course it is undesirable since it terminates the voltage as a tiny closed dipole. Is it possible to have a capacitor in some topology without detrimental effects to the antenna as if there was none? Maybe adding one leg of a capacitor to the coil for series resonance? Maybe immersing the coil into a fluid or something? Would a high capacitance give higher resistance to environmental effects like moving objects?


(If that is possible I would picture radios look just like Wilhelm Reich built his "orgone accumulators": Layers of insulators and conductors concentrically. I see all his so called inventions use static charge buildup, it is more based on convection currents in insulating media like in the atmosphere. In a way theres no magic about his orgone if we get that life needs electricity to function too. Sorry for the long off topic story)
Edit: Now I start to understand why Tesla saw his bifilar coil one of his best inventions. It has way lower resonant frequency.

[drscott]

I think the question regarding high frequency, was referring to the terahertz range

[monh]

Why the frequency of the same coil with slayer exciter is lower than your setup.
Your setup gave me 1mhz. But slayer exciter gave me 765 khz?. Thank you

[vintasalo]

Could you give me some feedback on a overunity motor build?