3v OU Flashlight

[MenofFather]

Those pulses are very strange.  They appear to be high frequency despite the core being stimulated only with ~10Hz rectangular pulses.
Their amplitude seems to be increasing and their count appears to be integer depending on the position of the pot core halves.

Can anyone explain this?

P.S.
That video was shot upside-down, so it helps to turn it around.

I also sometimes get that wery short pulses of about 20 herc and they have inside frenquency 200 kiloherc about, how that explain I don't known.

[TinselKoala]

It looks to me like a transistor is being overdriven into non-linear behaviour, perhaps heating a junction and causing a frequency shift.

It shouldn't surprise you to see a high frequency oscillation or ringing when you pulse an inductor with a slower square or rectangular pulse! The sharper the edges of the slow pulse, the greater the amplitude of the higher-frequency ringing, and the lower the resistive and radiative losses, the longer the ringing will persist before decaying (Q). If your slow pulses are happening before the ringing completely decays it will look like constant HF oscillations superimposed on the slower stimulating pulses.

[Dave45]

The coils being encased in ferrite leave only one explanation the system is setting up standing waves,
reflection.
I do not understand how a system such as this can pull in outside energy,,,,,,,,,,,,although there are wires leading in and out.

NMR maybe but I dont think a system using NMR will ever supply any big current unless doped, but even then the coil configuration has to be right.

IE: you cant pulse a coil with neg energy and expect to get back or collect neg energy, you will always get pos.

Lets say your using a thorium doped core and pulse the coil with neg energy from a bat, you will get nada always pos and will deflect the thorium electrons.
But if you use two chokes one doped and one not, pulse the non doped core then feed the bemf into the doped core then you can collect the electrons from the thorium.

Times are changing

This post may get me in hot water

[avalon]

Those pulses are very strange. 

Those are found if coils are scatterwound (meaning that the wire isn't laid down side by side).
I can hazard a guess that the coils are hand wound in a hurry.

Have a look...

Update: It is without a doubt a typical subharmonic (and/or chaotic) ferroresonant operation.

[avalon]

BTW, these are the collector of C1815....
The circuit is powered by a pair of AA batteries (3.2v). However, the amplitude of the signal is nearly 50v

~A