Joule Thief

[slapper]

Someone put the mag amp books here a while back:

Magnetic Amplifiers U.S. Navy 1951:
http://www.overunity.com/index.php?action=tpmod;dl=item204
You will need DjVu Viewer to open the document inside the zip file.

Magnetic Amplifiers Principles and Applications1960:
http://www.overunity.com/index.php?action=tpmod;dl=item205

Take care.

nap

[nievesoliveras]

...
Please correct the 680pF to 68pF on those base caps.

The other thing I think is because there is a pictorial element to your schematics, the secondary is actually going through the center of the toroid, but the drawing shows it going around the whole thing. I tried it the other day, and I cannot honestly remember what the results were so I will do it again later, but the thing is that it is going through the center right now and in all the results posted so far. So, please would you make this change too?
...
jeanna

@jeanna and @gadgetmall

The changes have been made changed graphic is at:
http://www.overunity.com/index.php?topic=6123.msg154882#msg154882

Jesus

[Mk1]

@slapper

Thank you very much!

[jeanna]

@jesus,
That looks great.

Thank you,


@gadgetmail,
Actually I really only need to make more turns. I was reading 1 or 2 turns. The voltage and brightness goes up with each turn but the amperage stays the same, when the light comes from the secondary. That is why I got excited about your 68pF cap. I didn't have my new toroids until today, so I couldn't actually make the extra turns.

I have been researching other things this evening. I am getting back to it now. I will give details tomorrow, I think.

And, I am doing my best to leave those fuji circuits in the box until I get this more figured out. I know it can be done.

Thank you,

jeanna

[Pirate88179]

@ Pirate
     Spend the quality time with your friend, I had to put my baby to sleep last year and
I still miss her dearly. Just so empty here now. Hard to miss 118lb rottie.

thaelin

Thaelin:

Thank you.  Sorry to hear about your dog.  I apologize for taking so long to reply but our topic keeps cruising along.  I really appreciate your thoughts.


@ Jim:

That is not a bad idea with the exception that the rouge that will cut glass in the manner you suggested is not hard enough to even touch the ferrite.  Glass is 5.5 on the moh's scale and ferrite is 8.5 and higher.  Some is even around 9.  Diamond is 10.   It will take diamonds to do anything to our little ferrite cores.  I have a small collection of diamond drills ranging in size from about 1.5" diameter down to about .030.  If I have to, I can drill a series of holes in close proximity and file the rest with one of my diamond files or diamond wire saw.  It won't be pretty but it will be a gap.  Or, I could stop by my ex-wife's company (which used to be my company before the divorce) and ask to use a diamond saw machine for a few minutes but, I think I would rather have all of my teeth pulled without any anesthetic.  Part of the fun of all of this is to make due with what we have, or can get. (scrounge)  I know you understand this as you do it all the time.  Great find on that ammeter with the cotton insulated wire.

Bill