Big Joule Theif

[sirmikey1]

Watson,

I found some ferrite ring sites yesterday. Mouser has 61mm and 23mm in stock, brandname is Wurth and the link for the specs is below for these part numbers.... Keep in mind that mouser can get anything for you.

The trick is to look through the mfg catalogs, and then search the stores.
Bingo. The top of the line is here, every size and quality imaginable: : Fair-Rite Catalog | Toroids

################
Wurth Ferrite Toroid Cores
"Type W" is High-Medium Permeability around 800
################

22.5mm Toroid (type W is high-medium perm)
Size/Spec 22.5 13.8 6.4 45 133 187 398 =13.3 3 W 800
Mouser #: 710-74270119
Mfr. #: 74270119
Desc.: EMI/RFI Suppressors & Ferrites Z=133ohms @ 100Mhz
RoHS: RoHS Compliant
Ships Now
$0.74


61mm toroid Type W
Size/Spec 61.0 35.5 12.7 64 133 323 680 =33.4 4 W 620
Mouser #: 710-74270097
Mfr. #: 74270097
Desc.: EMI/RFI Suppressors & Ferrites Z=133ohms @ 100Mhz
RoHS: RoHS Compliant
Ships Now
$5.86


Wurth Link
Wurth Ferrites: (Mouser does stock some models)
WE Produktkatalog

Fair-Rite
Fair-Rite Catalog | Toroids

TDK
Ferrites | Products - TDK



Laird Technologies
Ferrite Products | Laird Technologies

API
Delevan

[sirmikey1]

Watson,

I found some ferrite ring sites yesterday. Mouser has 61mm and 23mm in stock, brandname is Wurth and the link for the specs is below for these part numbers.... Keep in mind that mouser can get anything for you.

The trick is to look through the mfg catalogs, and then search the stores.
Bingo. The top of the line is here, every size and quality imaginable: : Fair-Rite Catalog | Toroids


Mouser Stocks These, and probably anything that you need them to

################
Wurth Ferrite Toroid Cores
"Type W" is High-Medium Permeability around 800
################

22.5mm Toroid (type W is high-medium perm)
Size/Spec 22.5 13.8 6.4 45 133 187 398 =13.3 3 W 800
Mouser #: 710-74270119
Mfr. #: 74270119
Desc.: EMI/RFI Suppressors & Ferrites Z=133ohms @ 100Mhz
RoHS: RoHS Compliant
Ships Now
$0.74


61mm toroid Type W
Size/Spec 61.0 35.5 12.7 64 133 323 680 =33.4 4 W 620
Mouser #: 710-74270097
Mfr. #: 74270097
Desc.: EMI/RFI Suppressors & Ferrites Z=133ohms @ 100Mhz
RoHS: RoHS Compliant
Ships Now
$5.86


Wurth Link
Wurth Ferrites: (Mouser does stock some models)
WE Produktkatalog

Fair-Rite
Fair-Rite Catalog | Toroids

TDK
Ferrites | Products - TDK



Laird Technologies
Ferrite Products | Laird Technologies

API
Delevan

[sirmikey1]

Watson,

I found some ferrite ring sites yesterday. Mouser has 61mm and 23mm in stock, brandname is Wurth and the link for the specs is below for these part numbers.... Keep in mind that mouser can get anything for you.

The trick is to look through the mfg catalogs, and then search the stores.
Bingo. The top of the line is here, every size and quality imaginable: : Fair-Rite Catalog | Toroids


Mouser Stocks These, and probably anything that you need them to
NO MINIMUM Purchase Required...
################
Wurth Ferrite Toroid Cores
"Type W" is High-Medium Permeability around 800
################

22.5mm Toroid (type W is high-medium perm)
Size/Spec 22.5 13.8 6.4 45 133 187 398 =13.3 3 W 800
Mouser #: 710-74270119
Mfr. #: 74270119
Desc.: EMI/RFI Suppressors & Ferrites Z=133ohms @ 100Mhz
RoHS: RoHS Compliant
Ships Now
$0.74


61mm toroid Type W
Size/Spec 61.0 35.5 12.7 64 133 323 680 =33.4 4 W 620
Mouser #: 710-74270097
Mfr. #: 74270097
Desc.: EMI/RFI Suppressors & Ferrites Z=133ohms @ 100Mhz
RoHS: RoHS Compliant
Ships Now
$5.86


Wurth Link
Wurth Ferrites: (Mouser does stock some models)
WE Produktkatalog

Fair-Rite
Fair-Rite Catalog | Toroids

TDK
Ferrites | Products - TDK



Laird Technologies
Ferrite Products | Laird Technologies

API
Delevan

[Mark]

Hey sirmikey quit posting the same message! thats 5 times now. Thank-you!

[morpher44]

Tesla patent #433702

I was looking over this patent of Tesla's
ELECTRICAL TRANSFORMER OR INDUCTION ... - Google Patent Search
and had this interesting thought.

In this patent, Tesla claims that by shielding the cores slightly,
a magnetic field threshold has to be reached before it fires over
to the secondary. In this way he can create a slightly
longer phase LAG.

If the goal in the Joule Thief is to achieve a nice low-wattage
resonance, and given that the transistor will INVERT or phase
shift the waveform 90 degrees, you want your Joule Thief transformer
to also phase shift EXACTLY 90 degrees for whatever resonant
frequency your shooting for.
By constructing a transformer this Tesla way,
it might be possible to achieve a constant-current on the
secondary -- allowing for additional LOAD to be placed on it
w/o altering the resonant frequency.

Anyway, for those Tesla geeks out there, take a look at
this patent and see if it "sparks" any Joule Thief ideas.

[SkyWatcher]

Hi folks, Hi morpher44, I have a ss bedini/joule thief bifilar just waiting for a mod like this. So my understanding from reading his patent is that this shield made of ferromagnetic wire between primary and secondary will enable more diverse loads to be maintained with optimum output at secondary due to resonance being maintained better or that the shield causes less of a reflection back upon the source/primary caused by the loaded secondary. Either explanation would be a bonus for the JT or bedini solid state oscillators. Thanks for pointing out that Tesla patent.
peace love light
Tyson

[Guruji]

Slayer JT

Hi Slayer I had build your JT circuit in the past with a 1.5v;2n3055;2n2222 and 20T;20T;480T to light a CFL.
Is it possible to modify this circuit to charge a 12v car battery? Should I insert a big cap?
Any help please?
Thanks

[slayer007]

Hi Slayer I had build your JT circuit in the past with a 1.5v;2n3055;2n2222 and 20T;20T;480T to light a CFL.
Is it possible to modify this circuit to charge a 12v car battery? Should I insert a big cap?
Any help please?
Thanks

Guruji If it's a smaller 12v you could try a SCR with a capacitor.

You could also try combining your primary coil with your secondary coil.
Making a big primary coil and use the BEMF off the transistor to try to charge it.

If you add more base resistance you could use more power in your JT also.

Sorry I hope that helps.

[Guruji]

Guruji If it's a smaller 12v you could try a SCR with a capacitor.

You could also try combining your primary coil with your secondary coil.
Making a big primary coil and use the BEMF off the transistor to try to charge it.

If you add more base resistance you could use more power in your JT also.

Sorry I hope that helps.

Thanks SLayer for help. Do you have any part number for good SCR and cap?
You told me to increase the bifilar coil?
Thanks

[slayer007]

Thanks SLayer for help. Do you have any part number for good SCR and cap?
You told me to increase the bifilar coil?
Thanks

Guruji here is a link showing how you can use two transistors to make a SCR.

Using a PNP and a NPN you can make a SCR.

The Silicon-Controlled Rectifier (SCR) : THYRISTORS

Sorry but I dont have a parts list.

[jeanna]

mini-wardencliff

I made another attempt to see what can be done with my miniature Tesla pancake coil in a conical shape.

It looks like a mini wardencliff tower.
What is surprising and exciting is that I am not seeing it go out of resonance.
Usually when a battery runs down a jtc will slip out of resonance.
It is for this reason that I make every effort to Untune my jtc's. (Then they won't lose what makes them work)

It is already small. It stands less than 2 inches tall.
I would like to see how small I can push it and still have it work, but
I would really like to make it bigger.
I am not a machinist nor am I very good at beautiful builds like some, and I am hoping someone who wants a reliably resonant circuit will make one that is a foot tall.

Anyway here is a little video:
little wardencliff

jeanna

[Vortex]

since conical shape coil is being spoken about ..
I offer this up for review.

Source link

... the windings increase in turns as it approaches the bottom of the core, taking the form of a cone with the apex pointing up, this is quite similar to the HomoPolar motor which does not experience any resistance no matter how much current is extracted by the load devices. ...

"JavaScript Tesla Coil Designer" .. plug in values to determine self-resonant frequency ..


IRON POWDER MATERIALS (inductance, frequencies, etc)

[Tectalabyss]

Please replicate

Guruji here is a link showing how you can use two transistors to make a SCR.

Using a PNP and a NPN you can make a SCR.

The Silicon-Controlled Rectifier (SCR) : THYRISTORS

Sorry but I dont have a parts list.

I've made these and they do work,I've had to make a work around part's we didn't have on hand and this was one of them.The boss wants it to run well you know the drill Anyway I have been playing around with secondaries and in trying to run another JT off my first I came across something I've never read about yet.My sec is running to a bridge rectifier I hooked up my sec JT off of the bridge rec and it worked but Led was dim.so I thought maybe the Transistor was bad when I took it out to replace it the the Led got brighter so I took the resistor out still ran. unhooked the Jt wire that ran to the resistor has it wasn't doing anything still ran.I checked the voltage it's only reading 0.71 Volt's.I added five more LEDs, I've had it running for a few hour's to see.Has anyone else had this happen. One thing If I take the Transistor out of the first one it shuts down. Thanks for any advice If anyone has the time. Tec

I have also unhooked the bridge rec It will not run without it. I took the JT toriod out of the circuit with the bridge.

My voltage is 1.58 DC at the battery. The voltage coming out of secondary is 1.53 AC. Voltage out of Bridge is 4.28 DC without load. Why is the voltage higher coming out of the Bridge????. voltage with load is 0.65 volts DC . I also added some more LEDS I now have 10 running.

[jeanna]

toroids

Thanks Vortex. That is a very supportive and hopeful drawing.

Do you know anything about the magnet in the drawing?
Is that a permanent magnet?
I do not think the magnetic field is going that way so it is puzzling me.

thanks

-----------------

I received a call from MMI this morning.
It was just a follow up to my samples request.
The upshot of the conversation was that he would try to influence his marketing managers to get mouser to buy these
0W48613TC
which Lidmotor used in jeanna's light and I used in the big gold copy of that.

The best thing would be for us to ask mouser for this at the same time that the managers are thinking about it and presenting it to mouser themselves.
Having this toroid be available from mouser would be the best of the possibilities, I think since this is a normal supplier for most experimenters.

thank you,

jeanna

[kooler]

Thanks SLayer for help. Do you have any part number for good SCR and cap?
You told me to increase the bifilar coil?
Thanks

in all the scr's i blew up
this is the one i liked the most
part# S6020L
it switches the fastest and with the lowest of current draw
but it does not have a high amp rating 20 amps i think
http://www.datasheetarchive.com/pdf-...-309/53339.pdf