Second Stage Joule Thief Circuits

[jeanna]

Wow Bill,
It sure is beautiful.


Is the primary on or are you putting it on at the end?

Jeanna

[Pirate88179]

stprue:

Thanks.  Well it will be nice....only if it works, ha ha.

Jeanna:

No, I have to wind the 3 turns and the 13 turns yet.  I had some trouble fitting all of this into that small box and I had to get a little creative here.  I wanted to get the 300 plus turns done first so, the rest should be easy.  (should)

IF it works, I will make a decent video of the device.  The good news is that I have a 20 ohm rheostat on the plus supply coming from the battery like Lidmotor did and I also have a 1k, 15 turn adjustable resistor going to the base so I should be able to tune in to make up the difference of adding all that extra wire due to the double stacked toroid arrangement.  Only time will tell.

Thanks,

Bill

[resonanceman]

Gary:

The large toroids are not in short supply.  We can get all we want or need.  Jeanna found a distributor that asks only a $30 minimum per order.  @ around $2/toroid, that's 15 of them.  We can pool a few folks together if that is too many for what a person needs.  To me, that is cheap per toroid and they can handle orders of thousands of parts if we need them. These are the same toroids from the same maker.

Since I am using them 2 at a time, I will need to get more of them soon.

Bill

Bill

If  you go to the Magnetics website and  click on  the  Distributor  Inventory button  ( it is 2 buttons above the order samples button ) 
Then  type  the  number for  your  toroid in  49740 will do
You  will find that  no   distributors in the world  have that toroid in stock .
If  you check the next 5 largest  toriods listed   you  will get similar  results .
The largest toroid  available  through  distributors of Magnetics  is 48613   85.7 MM
Not  small but  not near 140 mm  I do not  remember  the exaact numbers but I think there are a few thousand  in stock around  the world .

This is what  I mean by short supply .

Plus ...... if the powers that be  tried to stop  us ......preventing us from getting large toroids would  be  relatively  easy for them .



gary

[Pirate88179]

Gary:

Talk to Jeanna as she obtained a quote from a CA distributor on the exact toroids I just received as free samples. (OW48613TC)  These are 3.375" OD.  The girl I spoke to at magnetics said they had thousands of these in stock and I can get as many as I need, I just have to go through a distributor or, order more through the free sample program.

Maybe after Christmas, I can put up the minimum order and then make them available to the folks here as long as my shipping costs and expenses are covered, or anyone else can. 

Check with Jeanna to make sure I did not misunderstand what she said but I believe this info is correct.

Bill     PS  I told them I wanted these for a transformer, I did NOT mention the word Joule Thief or energy experiments to her.  This may make a difference.

[jeanna]

Gary and Bill and everybody,

The one that distributors around the world have IS the one I got and Bill got and you are the wattbuilder is the only one with the bigger one.

EDIT
About the code numbers
After the 4 which is all ferrite types
the first 2 numbers are the OD on mm.
So 86 is the 85.7mm toroid
The next are the height
so ending in 04 is 4mm.
TC means toroidal core
The W or J or other thing in that second place is the material
The first letter is the coating and O is no coating
It is in the pdf on every other page where it says how to order.

I hope this helps a little. Please copy this so you will have it later when you want to make an order.

jeanna