Joule Thief

[PaulLowrance]

Updates on my Gadget JT circuit measurements,

http://www.overunity.com/index.php?topic=8387.msg214223#msg214223

Last night the JT was terribly inefficient. About 25%. Today, I adjusted the 10Kohm pot to as far as it will go to get the highest efficiency, and it's at 44% efficiency.

Paul

[jeanna]

...you're going to need a heavy duty DPDt toggle switch to change from 110 to battery . Be sure to keep the circuits separate with that switch and tin stranded wires when wrapping them around screw terminals on those big toggle switches .
...

Hi Gadget,
I guess my explanation was not clear.
I will post this so it IS clear for everyone.

My effort was to create a self contained "bulb" that would have its own battery and switch and screw into a normal lamp.

The point ON THIS ONE is to not modify the electrical connections of the lamp so it can go into the wall with a normal bulb...
but then when I want to NOT use the wall, I want to screw in this special bulb.

I was hoping to reduce the number of dongles hanging from the special bulb and use the lamp's switch, but so far, I have not found a good way. Nor have I been able to find an adapter that I can use for this yet.

The solution last night worked, by connecting the battery terminals to the plug ends, but there is too much wire or too much something and the battery juice is less effective when I am doing it this way. Maybe it is too much impedance?

I may try a thin piece of wood and attach a switch along with the battery .
I like the rheostat, but it is adding too much wire to the inside of this bulb, plus it is too heavy.

I will keep trying.

Thank you for your suggestions,

EDIT

I will add more here"

Also the jeanna toroid i made with the red wire will light up an unmodified CFl intermittently ,meaning it blinks or strobes full bright .

If you are using the painted grey toroid, you are not getting the best materials.
It is important to get a non powdered toroid and the shiny, grey painted ones are in the powdered category afaik.
If you have one that is uncoated and the size of Pirate's you might be getting somewhere.

My little improvement on the MK1 is enough to raise the voltage on this toroid by at least 2 if not more. If you recall, I put the scope away when it was reading 1400v, but I continued to SEE a difference and I estimate the voltage ended at about 2,000 volts.
Now, if that isn't enough, I think we need to change something else!!

jeanna

[gadgetmall]

No i  Chunked them . I am using the 4 i got from Magnetics that lit all those fl's a few post back . It makes an unmodified CFL strobe bright . i think it wound like an mk2 will make it appear like ac would to the bulb and fire it off without tearing them up.

[innovation_station]

i un wound my 808

i have a blank w core 140 mm

i guess its time to wind something on it ..

ist!

second pic for J  please have a look ... let me know what you think ...

[innovation_station]

i started to wind this core ..

im useing 12 ga solid 

primary coil on this wind is 2' trigger is 6" secondary / pickup 18'

mk2 wind config 9' 1 way 9' back the other

a pic..

ist

i may modify jt coils ... to find the best config ... however i think this is close ...

only testing tells

here ya go ... and i dont want to talk about how hard it was to wind it with 12 ga solid ... but it is done ... a few more pics