7.8 Hertz Resonant Circuit

[Turbo]

If you pay attention you can see in the video description that the effect has been replicated and confirmed by other experimenters using different configurations and methodes please try it before you draw any conclusions to judge or dismiss something that you have not tried yourself is the highest form of ignorance.

[tim123]

If you pay attention ...

It's ok Turbo, If you read what I wrote, you will see that I didn't dismiss, draw conclusions, or judge...

BTW - All your vids seem to have gone from your channel... I just looked - is it just me?

I think I will try the experiment... Can I just ask you a few questions:

1) Did you drive the coil with your audio amplifier and a signal generator?
2) The coil was toroidal right? So should emit minimum external flux...
3) The 2 ring magnets were placed on a mild-steel base - Correct?

Anything else I should know?

Regards, Tim

[tim123]

I just found the original(?) of the magnet spinning at 7.8hz:
http://www.youtube.com/watch?v=mUJza3l8rmU

The very first comment (and it wasn't me!)

"Anyway this might be Shumann resonance, but far more likely it is just the mechanical resonance of the system which is based on the strength on the magnetic field and the sizes of the magnets happening to sit at about 7.8 hz."

[TinselKoala]

A 10 milliHenry inductor and a 41500 microFarad capacitor stack, placed in parallel, will make a tank circuit that will resonate at 7.8126 Hz. 

[MileHigh]

The second half of the quoted YouTube comment is correct.  The clip is showing a mechanical resonance that just happens to be about the same frequency as the Schumann resonance.  The Schumann resonance is over hyped.  I am not aware of any useful applications that take advantage of it's existence.  It's like being in an underground echo chamber.  It sits there passively and will only respond if you stimulate it with a source of sound waves.

That's in contrast to the reflective layer of the ionosphere as a whole.  The classic example is radio communications that are assisted by bouncing their transmissions off of the ionosphere.  Also, when there are a lot of charged particles streaming into the magnetic poles from solar activity they create new temporary mirrors shooting up from the poles.  Ham radio operators try to take advantage of the situation.