Joule Thief

[Pirate88179]

This looks like a possible source:

https://www.amidoncorp.com/categories/7

In looking at the "43" material (whatever that is) I can get a 2.9" OD X 1.53" ID X .500 Thick for $15.00 ea.  That item is on this page:  https://www.amidoncorp.com/items/13

They also have a 3.5" OD in the "61" material for $45 ea.  (ouch)

Bill

[Pirate88179]

A side note in my research... here is a power simulator to use to select the core material for your toroid winding applications:

http://www.poweresim.com/index.jsp

Bill

[innovation_station]

a quote from the supplyer of the big cores i have ..  from your link bill

ty btw ... great page!

2009-10-22: Micrometals new low loss materials are now open to public.

magnetics   notice Q speed..    another sponcer..

who is good with companies... 

WE NEED DONATED MATERIALS TO A GREEN ENGERY SOULTION ... I BET THE CO. COULD GET A WRITE OFF FOR IT .. 

could be donated to OVERUNITY.COM... then desprised to the reserchers ..

and in return the sponcer will aquire a working device...  as a gift ... 

same deal with the U CAPS ..

I BET GM OR HONDA IS ALL OVER IT ...... 

HISTORY IS WRITTEN ....   you only need to read to discover ...     for the short version of history ...  refer to page 1 of this thred...   for the long version ...  start with what is written in stone..... 

cant wate for the rest to get all the credit that is do to them as well !

thank you!

a quote from  magnetics  III page  say i yi yi lol 

Magnetics® is a leading world supplier of precision soft magnetic components and materials to the electronics industry. We specialize in research, design, and production of a broad range of high-quality powder cores, ferrite cores, and strip wound cores for applications such as chokes, inductors, filters, transformers, and power supply components for use in alternative energy, telecommunications, aerospace, automotive, military, computer, medical, and other electronics systems.
News
Competitor Cross Reference Tool
( 11/23/2009 ) : Get the most up to date competitor cross reference information with Magnetics’ easy to use Competit ...
New 4 Inch Kool Mu Toroid
( 10/20/2009 ) : Magnetics has expanded its line of large Kool Mµ® toroids.  With an O.D. of 4 inches ...
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[Pirate88179]

@ IST:

Thank you.

@ All:

Here is a report on how to assess unknown toroids: 

http://www.alan.melia.btinternet.co.uk/toroids.htm

Good info here on which type to use for which applications.

Bill

[gadgetmall]

@ All:

I am pissed!!!!  I just received my order today from All Electronics and, in the box was my wire, pots, battery holders, etc....everything EXCEPT the 3/38" Toroids!!!!!!!

I received an order confirmation and also a shipping confirmation that said everything was on it's way but, the packing slip says they are "out of stock" on these toroids and that I was not charged for them.

So, now my mission is to locate another source which I will do as soon as I get a chance.  If anyone out there already has found another source, please share it.  IF I locate one, I will post it here.  Maybe the good news is that if another source is located, maybe we will get known specs on them.

Looks like my Jeanna Light replication is now on hold...

Oh well, life goes on.

First the B-caps get bought up and now these toroids....hmmm...I wonder if we are having an effect on the marketplace out there.

Bill

BIll they are available from the micrometals / magnetics manufactures distributor www.mag-inc.com . they have the exact grey torroid you need . Includingthat big one i got .
Al