Joule Thief

[xee2]

@ jeanna

did you take measurements on that 2 inch one when it was wound only half way? ... to compare with it all the way around?

No.

But if you look at the 3.38" toroid data I posted for 20, 60, and 80 turns you will see that it follows the equation I posted for pickup coil voltage vs number of pickup coil turns. These coils covered various amounts of the toroid.

[Mk1]

@xee2

First thing i see is that the way you make your pickup coil is the same as the regular mk .
so i guess you will not find a answer there .

Now if most of you did not check for dead spot then , you have no clue as to why i would separate the jt coils ...

I notice that at some location on the toroid would get 3 to 4 volts per turn and other location less then one volt, so i decided to make a design that would give me the same voltage per turn any where on the toroid .

Also i keep the jt coil to the same number of turns , to improve the resonance factor.

Now i do not care anymore for the highest voltage because it only show a minimal part of what we need to know , there is also something called maximum power transfer , and by the way any of you guys made led sing ...

The problem is that most assume the field goes all the way around the toroid , not true unless you made sure it did.

Altrez do not worry your coil are not that different , now if you ask me the single most interesting thing about my design is the jt coil them self and are responsible for the led working both ways .And the caps charge faster , so there is still something here .

Now if i make a design that get me 3 v per turn , i will need less turns for a higher voltage and could improve the power transfer by weight tuning the thing .

Plus i like the way mine looks .


Mark

[altrez]

@xee2

First thing i see is that the way you make your pickup coil is the same as the regular mk .
so i guess you will not find a answer there .

Now if most of you did not check for dead spot then , you have no clue as to why i would separate the jt coils ...

I notice that at some location on the toroid would get 3 to 4 volts per turn and other location less then one volt, so i decided to make a design that would give me the same voltage per turn any where on the toroid .

Also i keep the jt coil to the same number of turns , to improve the resonance factor.

Now i do not care anymore for the highest voltage because it only show a minimal part of what we need to know , there is also something called maximum power transfer , and by the way any of you guys made led sing ...

The problem is that most assume the field goes all the way around the toroid , not true unless you made sure it did.

Altrez do not worry your coil are not that different , now if you ask me the single most interesting thing about my design is the jt coil them self and are responsible for the led working both ways .And the caps charge faster , so there is still something here .

Now if i make a design that get me 3 v per turn , i will need less turns for a higher voltage and could improve the power transfer by weight tuning the thing .

Plus i like the way mine looks .


Mark

Thank you for taking the time to explain that I see now what your getting at. If there are dead spots in the toroid then your design would account for that.

I am not sure there are dead spots as I have not noticed them before "does not mean there not there" I will see if I can find any on my toroid's.

Thanks!

-Altrez

[xee2]

@ Mk1

@xee2
Now if most of you did not check for dead spot then , you have no clue as to why i would separate the jt coils ...

I notice that at some location on the toroid would get 3 to 4 volts per turn and other location less then one volt, so i decided to make a design that would give me the same voltage per turn any where on the toroid .

I have not found any dead spots. I have put my coils in as many differrent locations as I could and did not see any difference in performance.

If you can produces twice the voltage I am getting using the same number of turns for the pickup coil then that would be a big step forward. However, unless the data is taken using the same toroid type it is hard to compare results. I do not get over 1000 volts with my toroids using only 140 turns. But others who have used your design do not seem to get over 1000 volts with 140 turns either. So the only conclusion I can make is that there is something special about you core and not the windings.

My results using one of your designs were the same as the solenoid coils I am using. I did not see any improvement in performance. I have not seen anyone document an improvement in performance using your designs. That does not mean they are not better, only that there is no documentation to show how much better they are. Perhaps you could do a comparison test and post the results.

[jeanna]

@ jeanna
No.

But if you look at the 3.38" toroid data I posted for 20, 60, and 80 turns you will see that it follows the equation I posted for pickup coil voltage vs number of pickup coil turns. These coils covered various amounts of the toroid.

Yes,
I was only suggesting that you had also not done the experiment you were calling for.

You could do half then full on your 2 toroids and see if going to the other side by itself doubles the voltage. - or more importantly takes it down.

I assumed that you had compiled a certain amount of your own data to make the prediction you made. (you did)
And, if you needed more data you had the opportunity to gather more from your own toroid by making a full one from the big one.


thassall!

jeanna