what happens between a teslacoil the battery the incadescent bulb and the ground

[tinman]

There are a few things that you may or may not know so I'll say them anyway:

It's a natural requirement/condition of 1/4 wave resonance that the current lags the voltage by 90 degrees = 1/4 cycle of the wave = the length of the resonator. Due to the reflections that occur, a standing wave forms, and the current and potential are distributed at opposite ends of the coil. Maximum current is at the ground end, and maximum potential is at the top/free end, 90 degrees or 1/4 wavelength apart, physically, in space. "Free" being the end with the least capacitance.

When one end of the coil is connected to earth or a big capacity, the free end becomes sensitive to parasitic/external capacitance, which throws the coil out of resonance, and if it's too much then it will stop working altogether.

When both ends of a coil are free or have equal capacitance then it will become 1/2 wave resonant. Through increasing the capacity on one end, the coil can effectively be "biased", and the highest potential will be forced to the end with the least capacity, which presents the greatest opportunity to escape from the system. But this will be the end that's most sensitive to external capacitance.

As some of my pictures show, the bulbs are brightest when they are in series with the capacitance terminal on the top end of the coil, because the energy has to flow from the coil to the terminal and back again in order to resonate, and that's where the highest potential is. But I could never hold the bulb in my hand and light it from the top terminal, because the capacitance of my body would throw the coil completely out of resonance, and so in order to do that I would need to retune it to work while my body is connected to it.

On the other hand, when there's a larger capacitance on the ground end of the coil, which includes the primary and its inductance and the capacitance of the circuit etc, the coil is tuned to its natural resonant frequency, and so there's no amount of capacitance that I can add that would affect its resonant frequency, so I can easily hold the bulb to the terminal and light it in my hand without having to retune the coil, because I'm taking the output from the end that ALREADY has the bigger capacity, and the coil is already tuned to output energy. The free end is doing what it's supposed to do - remaining free to resonate with the maximum potential, and the ground end is outputting the energy.

So I would say that for these reasons, your bulb is brighter at one end than the other. If the primary was placed along the centre of the coil, then assuming everything is mirrored, then the bulb should be equally bright (or not) at both ends.

Is your device grounded?--as in,do you have a ground spike driven into the ground,that is connected to the negative side of your circuit.


Brad

[TeslaScientific]

Is your device grounded?--as in,do you have a ground spike driven into the ground,that is connected to the negative side of your circuit.


Brad

It depends on the experiment. It's not earthed when it's used as a single wire source in specific situations, but it must be earthed to transmit.

[gotoluc]

Hi everyone,

I've been fortunate to obtain an original TinselKoil made by TinselKoala himself

The below is the first test video of many to come.
I have come up with what I believe to be an accurate input power measurement circuit and an estimated output power comparative method which is (for now) visually done.

Link to video: https://youtu.be/vPpgHSN9jPc

Regards

Luc

[woopy]

Hi everyone,

I've been fortunate to obtain an original TinselKoil made by TinselKoala himself

The below is the first test video of many to come.
I have come up with what I believe to be an accurate input power measurement circuit and an estimated output power comparative method which is (for now) visually done.

Link to video: https://youtu.be/vPpgHSN9jPc

many thank's Luc and TK

really intersting first results

Iam looking forward for the next video

Laurent

[Magluvin]

Hi everyone,

I've been fortunate to obtain an original TinselKoil made by TinselKoala himself

The below is the first test video of many to come.
I have come up with what I believe to be an accurate input power measurement circuit and an estimated output power comparative method which is (for now) visually done.

Link to video: https://youtu.be/vPpgHSN9jPc

Regards

Luc

Very cool. 

So then probably the next step would be to add more receivers around the transmitter and see what happens. Would the transmitter start to show loading on its input? Would a second receiver take away from the first or would 8 of them light up just as much as 1 at the same distance?

Could the receiver get a third receiver going, while the 1st receiver is driven from the transmitter? Put the 2nd receiver on the opposite side of the first receiver, all 3 inline, transmitter, 1st receiver then second receiver.

Mags