Joule Thief

[xee2]

@ jeanna

I have no answers to your questions. I am just starting to look at this. I reversed the base and collector coils - data follows. I plan on doing a B2T-C2T-P100T test and then making a new coil with more turns in the pickup coil.


EDIT: re-posted data. One of voltages was wrong.

If voltmeter is replaced with NE2 neon bulb it lights brightly without base cap and very dimly with 100 uF base cap.

Added more cap values for jeanna.

[xee2]

In the previous circuit with a 104K base capacitor, when the voltmeter is replaced by 9 LEDs in series the current increases to 28 mA.

EDIT: As the number of LEDs in series is decreased, the battery drain is increased. This indicates that the voltage across the pickup coil leads effects the battery drain.

[stprue]

@ Jeanna

Double ferrite does nothing!  Not sure why but it will not resonate.  I can tell it's hooked up right because I can see amp draw out of my power supply but there is no voltage associated with it, So like my Hazens 350vdc coil it will not work.  More then likely user error but regardless it needs to be dismantled.

[jeanna]

@ Jeanna

Double ferrite does nothing!  Not sure why but it will not resonate. ..

Hi stprue,
I am sorry to hear that.

I wonder if you had enough primary bifilar wires on there to set the primary in motion?
It might take more on that end since ultimately it is changing the mag field on 2 toroids?

Oh well, it is almost as much fun taking it out, Or as we used to tell people in the yarn shop, if you liked knitting it once, you'll like knitting it again. 

(good the smiley worked today)

thanks for the report too,

jeanna

[jeanna]

Hi everybody,
I made half of a new series of tests today.

xee2's tests are a continuation in a way. My largest cap is xee's smallest. Thanks xee for doing that.

Mostly the important words are included in the pic, but just to say,
I removed the primary bifilar I have been using to tune this filter as a MK x2.
I used the newbie wire for it. But there is this piece of must be epoxy in a drop right in the interior and in the way.
So, I went to the Hazenz type of primary wind and left that epoxy blop as the dead spot opposite the primary.
I then wound 23up and 23down on one side of this filter. I kept the 10 up and 8 down from earlier tests and re-tested this with that wire.
I will remove that wire tomorrow and replace it with the rest of the MK1 which I will then test some more.

There are a lot of numbers.
I sorted them to make it easier to read.
I sure hope there aren't any mistakes!
I think the trends are clear if you take the time to pour over it a bit.
So, please don't be put off.
I think this is important to what we are doing here.

thanks everybody,

jeanna