Joule Thief

[TheNOP]

I was just wondering if it was the collapsing magnetic field of the coil to collector that is causing the voltage gains in the secondary - wouldn't the coil to base be interfering with the maximum gains attainable by the secondary?

in a way, yes.
but not as much as you might think.

there is a tradeoff here.
either you complicate the circuit to trigger the base with an external oscilator and remove the base coil.
or you keep the circuit like it is now, simple, yet,
hard to master because changing 1 small thing affect a key factor.(the frequency)

for 1.5 volts applications the bjt is the way to go.
for higher voltage source, an external oscilator is perfered, by me at least.

external oscilator is also possible with 1.5 volts, but since we must prevent interferences from reaching the oscilator circuit it limit the lowest voltage it can operate at.

[nievesoliveras]

here is the tesla patent that resembles our work here on the joule thief.  its initial dual coil design gets the high frequency (without need of transistor) then runs it through a second transformer for the extra kick in high voltage. and to think there could be a high voltage high frequency regulator with nothing but a copper wire

Do you have a modern version of this circuit?

Jesus   

[xee2]

@ jadaro2600

I get more voltage when using the 150 winds as the coil to collector than I do when using it as a secondary.

Yes. So what. You seem to be missing the point. Which is:

I'm consistently having more luck with the coil to collector - which puts me in a position to damade the transistor due to over voltage.

If you have a high voltage on the collector coil it will zap the transistor. You do not say, but I am sure that the voltage on the 150 turn coil when used as a pickup coil is much higher than the voltage on the 12 turn collector coil when used as part of the JT. Measure them and tell me what the voltages are. The point is that using a pickup coil allows you to get high voltage without zapping the transistor. You seem to have some sort of mental block about this.

The pickup coil can also be used to get higher currents if it has fewer turns than the collector coil. More turns than collector coil yields higher voltage than collector coil, fewer turns yields higher current than collector coil.

[jeanna]

@jadaro,

I have been "downloading" (from the quantum field) a lot of information for the last month. AK's insistence on sending us to view Tesla patents (  ) got me to do something I have been wanting to follow up on but have not. It is the main reason I do not want to COLLECT the output in a capacitor. I want to keep it as AC.

In this patent is Tesla's discovery, more than the light bulb or the spark gaps as switches or anything. This is what has been in our faces and hidden from view all along.

Please look at and read his comments in this
http://www.pat2pdf.org/pat2pdf/foo.pl?number=462418

In this patent he states that his discovery has to do with excessively high voltage and frequency.

It would seem that since in AC, the amps go first one way then the other, never really going anywhere at all, that Tesla discovered that merely having them "exist" for an extremely short time is the same thing as having them "travel" down" the wire.

Hidden in plain view.

We need higher voltage and higher frequency.

Lets DO IT.

jeanna

[TheNOP]

Please look at and read his comments in this
http://www.pat2pdf.org/pat2pdf/foo.pl?number=462418

In this patent he states that his discovery has to do with excessively high voltage and frequency.

It would seem that since in AC, the amps go first one way then the other, never really going anywhere at all, that Tesla discovered that merely having them "exist" for an extremely short time is the same thing as having them "travel" down" the wire.

Hidden in plain view.

We need higher voltage and higher frequency.

Lets DO IT.

jeanna

you are already doing it jeanna.

knowing what tools he had, to come to his conclusion, how would you have describe what Tesla discovered ?
making corelation between, the old electric terms, and the today's terms, use to describe things, is not always easy unless you have experiences in the field.

did you know that in his last years of life he found that extremly higher voltage was not needed to see a "new" electricity ?

today, we have better tools and you can see what Tesla needed high voltage to see, ... in the jt.
i tell you, frequency is the key.

no matter what someone else tell you, we have Tesla knowledge teached to us at schools.
they don't teach who first discovered inrush current nor who discovered mag field collapse effect.
but they do teach us about them.
they teached me how to suppress them, or how to use the later in high voltage applications such as flyback transformer.

and you know what ?
what i see when i look at the open SM TPUs are, ... joule thiefs.

the later TPU are probably also relying on other specific effect(s) as well,
but at the base there is those kicks at high frequency in both.
no OU, just a new way to make things work.

for me SM's special inverter is nothing more then a modulated AC signal made with a ~5kHz currents carrier.

i might be wrong, but that is my educated guess.