Joule Thief

[jeanna]

@ jeanna,

Someone (not me) called the secondary coil a pickup coil. I think that is a good idea and I have been doing the same. That avoids the confusion of thinking one of the JT coils is the secondary. So I would now suggest using the terms base coil, collector coil, and pickup coil. Does that seem like a good idea to you?

It is except for the outside world... but ..

who cares?
It is a good name because it is different and this whole thing is different.

I believe it was MK1 who named it "pickup" for that very reason.

@xee2,
Do you feel like fixing the drawing to include this and the BJTL and maybe Battery cap and battery resistor too?
And anything else we have been using?

jeanna

[stprue]

@ jeanna,

Someone (not me) called the secondary coil a pickup coil. I think that is a good idea and I have been doing the same. That avoids the confusion of thinking one of the JT coils is the secondary. So I would now suggest using the terms base coil, collector coil, and pickup coil. Does that seem like a good idea to you?

And it make perfect sense too!  hehe!

[jeanna]

Here is probably all I can report for today. I have to recharge my joule thief batteries. The results started to go down and that was because the battery was running low.

Here is what I was doing:

My primary is that dblxx thing just as I drew in the final drawing which has 5T,5T but split and crossed as 3T2T each, and THEN, crossed at 90 degrees as in the Tesla rotating mag field patent.

The secondary/pickup is like the tesla patent too.
Well, just for a standard, I made one with 4 turns in each block all going around in a straight ring, but now for the excitement, I am making them cross over to the opposite side and reverse the direction too.

So that did work really well. 43v and high frequency too.
The problem was that it wasn't increasing with a second layer.
First I just wound over the first layer with a second and the voltage went up but by less.
I tried a lot of different things like wrapping from top where it had been bottom. That was worse. Everything else I tried was worse. The voltage actually went down.
So, I will just do it right and stop the preliminary trials and then see.

I found that if I jostled the primary to much the voltage would go down , often by 10v. And jostling the primary is easy to do.

So, 43v on a 16T pickup.
(I did get it up to 52v, but with diminishing returns .)

jeanna

[xee2]

@xee2,
Do you feel like fixing the drawing to include this and the BJTL and maybe Battery cap and battery resistor too?
And anything else we have been using?

jeanna

Done.

[stprue]

My pickups are done.  I will finish my base and collectors tomorrow as I wound them wrong to begin with!

@Jeanna

Those results are good considering a low baterry and few turns.  I ended with 52-52 by 52-52 turns on the pickups so now I just need to finish the C&B coils and tune!

I hope it works