Joule Thief

[jeanna]

Great job, freepow!!

Are you reading peak to peak voltage? I think you are.
It sounds like you have the tuning very well done for your toroid.
Is there any more room in the center of your toroid?
You could just make a secondary that fills it up. This will give you the practical limit of that particular toroid.
VERY GOOD
CONGRATULATIONS

@xee2,
I have seen just about every wave shape possible from my secondaries.
I even get a pure sine wave from time to time.
I never got a pure sine wave with very high voltage, though.

If I make a simple solenoid for a secondary the wave is a simple pulsed dc.

I think YOU proved to me that a skinny pulsed dc wave is very effective, and there is no need to look for a smooth or curved shape.
I do still notice them, though.
A couple of days ago I saw a string of filled in balls held together by a thin single wave. I saved a pic, it was so unusual.

jeanna

[freepow]

  Sorry everyone, maby I am wrong, it lights up only one side of NEON, does that mean it is not very good getting 134 volts from 8t bif - 30t  wound toroid
I'll send a pic of scope shot later.

[jeanna]

Sorry everyone, maby I am wrong, it lights up only one side of NEON, does that mean it is not very good getting 134 volts from 8t bif - 30t  wound toroid
I'll send a pic of scope shot later.

You are doing it right.

It only means that you are getting pulsed DC... which is what you are supposed to be getting(, IMO).

I love pics and scope shots!

jeanna

[xee2]

@ freepow

Sorry everyone, maby I am wrong, it lights up only one side of NEON, does that mean it is not very good getting 134 volts from 8t bif - 30t  wound toroid
I'll send a pic of scope shot later.

No. It means your JT is working like a normal JT. To get higher output voltage just add more turns to the pickup coil.

Please do post scope shots. There are not very many good photos posted yet because not many of us have scopes.

[IotaYodi]

Please do post scope shots. There are not very many good photos posted yet because not many of us have scopes.

I have to disagree with that. I too like scope shots. A scope gives you so much more information than just a meter. Those are some nice photos though.