Joule Thief

[xee2]

@ Thaelin & petersone

Resonant coupling is not something with easy calculations. But, I hope this will at least help in understanding why the input circuit bulb goes out. If you are familiar with resistive voltage dividers then this should be easy to understand. Note that when the coils are tightly coupled there is as much power in the coupled coil as in the input coil.

EDIT: Note that the volts in the boxes are across the resistors the arrows are pointing to.

[petersone]

Hi xee2
Thank you for time to share your knowledge,I will read it some more,but I think basically you are saying,at resonance the juice is bypassing the first bulb? Thanks again.
peter

[Artic_Knight]

by the way i did some research on water and resonate frequencies and found that jenna was right and i was right. the 2.4-2.5 ghz frequencies is resonate for the water to obsorb energy as heat however jennas frequency of 42,800 is the actual resonate frequency for destruction of the water molecule.  still its kinda odd that microwave ovens operate at the 2.4-2.5 ghz level and the ground is at the 2.4mhz level isnt it? maybe we should explore the 2.4mhz level and its relation to electricity and magnetism?  i would do so myself if i had a scope. if someones bored they might want to set the freq generator to that (dont all scopes have one?) and play around :-p maybe 2.4mhz is near the resonate frequency of magnetism? and if so we can create a tidal wave of magnetism to harness

[xee2]

@ petersone

Hi xee2
Thank you for time to share your knowledge,I will read it some more,but I think basically you are saying,at resonance the juice is bypassing the first bulb? Thanks again.
peter

No, I do not think bypassing is quite correct. It is more like the power is divided between the resonant circuit and the bulb. At resonance most of the power goes into coil. Off resonance most of the power goes into bulb.

[xee2]

@ Thaelin & petersone

As far as OU, a resonant circuit can store energy much like a capacitor. To claim OU it would be necessary to add up all of the power that went into a coil and compare that to the power stored in the coil afterwards. The coil is no more of an OU device than a capacitor is. Comparing the power going into the coil in a single instant of time against the power accumulated over time is not a valid way to measure OU. The same is true for resonant circuits. They can store energy. To claim OU the total energy in must be compared to the total stored energy. Or measurements of input and output power need to be made simultaneously on a circuit operating in a steady state mode.