Joule Thief

[Mk1]

@stprue

You still make it wrong , i have modified your picture look at it !

Now the wire goes over 2 wire this should not happen . man i don't know what to say its seems so simple , but here we go .

Once you did it one way , going back fill the gap between the wire already one and dont skip wires.

[Mk1]

@stprue

One more picture , this is how it should look.

Mark

Its probably the like hazen , but i am not sure.

[stprue]

@stprue

One more picture , this is how it should look.

Mark

Its probably the like hazen , but i am not sure.

This is a great pic and will help anyone having trouble.  The only thing That is catch me is that first back-down turn.  In your alter pic of mine you have it just as a solid.  Now there is no initial crossover you can see...so where is it? If you are winding it on the other side I am not getting that from your direction.  What is happening on the first downward wind?  I'm off to bed now but I will read your response asap tomorrow morning.

Thank you for your help...Stew

[jeanna]

See,
Now look at the top one that MK1 just posted. It is not crossed twice but it looks it. It seems to be crossed on the top and the bottom.

I can see that you are only crossing it once but it just looks it. Get your crosses on the inside or this will never stop.

As Mark said, do not cross the first one. Just carefully place it in between the first 2 wires for the return trip. Then when you come out of the bottom, you can carefully place it again, but not next to the one you just wrapped, go past it and past the next one. That is where the question always arises. It seems wrong.

But I can see you are carefully placing them on the inside and letting them cross on the outside.

jeanna

[jeanna]

... Does the scope have a multimeter built in? I need to use a capacitor to measure the voltage. And the voltage measured will depend on the value of the capacitance. So unless you are able to measure using a diode and a capacitor I do not think we will ever get the same readings. Without being able to get the same readings I do not see how we can compare results.

...

When we both had 200 ohms at the base resistor we got the same results. I got 235v on the highest peak to peak and you got 238v in your diode + cap. If your cap is too small you will not see a figure as high as I do, (as shown by your first result of 137v with 60pF cap.) but I will see all the other lower figures in addition.

I think we can see how we got the same results without having to make the tests exactly the same way. I should not have to cripple myself just to see the results exactly as yours are.

I would like you to try the other 2 windings and lower your pot . I got bonanza amounts when the pot got down to 38 ohm.

I would like to see what you get with the same winding and resistor value.

thank you,

jeanna