Joule Thief

[gadgetmall]

@gadget

Are you sure the toroid is the same one from goldmine ?
I know it is a decent one .

The diode used are also really important in testing , i like the 1n4007 because there good up to 1000 volts and i made test and compare different
bridges , and get huge difference in voltage like over 50 , the 4007 don't drop it much , they are not germanium but real good .

Have you use the page 478 guide.

Using that method i can quickly determine , the quality of toroid a good one i usually get 70 to 100 volt dc(rectified) at 1k.

Ok some idea for you , now that you have almost stopped the battery draw, why not go one more step , the base coil resonance is good but if both the coil are in resonance , noting should slip away .

The pickup coil can easily power other transistor, the tricycle is a good proof of that , i plan now on setting it in a endless amplifier way .

Have you tried the collector coil resonance ?

Mark

Hi Mark . Of Coarse i'm sure they are from goldmine. and the 150 turns from the hazen is killing the core no doubt at all . Jeanna sees it and i see it . The Jt 3 and 7 does not light a light. It will light a little with a 10 ohm resistor . 5 oms no light 15 ohms no light 10 ohms a little light . I have scrapped that one and wound another one using bell wire . 11 turns Bifilar  on one side and 70 secondary on the other side . I get 115 volts . The Difference is i would the secondary the opposite direction than the primary and  i used bell wire . I got 30 turns then checked the volatge it was 35 i then wound another layer and then another and another  4 layers thick and 115 volts DC . this is rectified with a 1007 and using a 104 cap . Its higher but it still is not what i am looking for but i am smiling cause i am lighting up a RED neon bright !! . I have a few more blanks and i might wind them later on tonight ..edit got 128 volts using two 1n4007 one cap from a fugi and 330 ohm resistor Battery is a nicad  1.110volts. I noticed if i turn the diodes around the other way  i get 10 volts ? and the last photo a small portion of this months windings . what a mess

Gadget


gadget

[resonanceman]

This is a picture I created; the colored parts are all optional points where voltage can be derived.

Here is a picture of a JTC running without a resistor, and instead a capacitor.  In the drawing you reposted, the capacitor can either be as shown, or instead linked to the positive terminal.  If you look at the pictures, you can see there is no resisted path to base, there is only a virtual circuit there where induction or flyback opens the transistor.

This type of circuit is hard to control when it comes to frequency, however, it will reach reach resonance, and it can then be tuned by adjusting the capacitor's capacitance instead.

( there is a delta to this of course, the circuit will only work within a certain range )
*edits:

I apologize for the mess, but I used different transistor in these pictures, it didn't seem to matter which one, the both worked, the little one is a 2n2222 and the big one is an NTE210.

Coils for the base and collector are turned side by side..in this instance, they are a twisted pair, and the pickup coil is 3 winds to one wind of twisted pair ( hence the notation in the schematic )  ..i have gotten this to work in other ways, however, this is the best example.

Also, the third picture is an axially molded inductor, with an inductor around it. This circuit runs at high frequency, the axially molded inductor contains magnetic materials ( ferrite ) and looks like a resistor.  This circuit also does not use a resistor.

( I guess these were the last experiments I did with this circuit before finals started )

Thanks  jadaro

I  am sure that  your reply will help alot

I am calling it quits for  tonight .
It has been one of those days .   
Tomorow I will probably  find sone silly mistake  that   SHOULD be almost impossible to miss . 

I am not real sure about the  frequency thing .

I will have to find  a way to keep it in resonance . 


gary

[jeanna]

... Of Course i'm sure they are from goldmine. and the 150 turns from the hazen is killing the core no doubt at all . Jeanna sees it and i see it . The Jt 3 and 7 does not light a light....

. The Difference is i wound the secondary the opposite direction than the primary and  i used bell wire ...

Hi gadget.

I cannot answer your question.
ALL my primaries go in two directions.
It is therefore impossible to say that the secondary is wrapped opposite to the primary.

But what I described earlier is very close to what you said about the 2 directions.

Ours are too different to relate exactly, I guess.

Anyway,
I think the thing that makes the MK designs a winner every time, is that the secondary wires go in both directions as well as the primary. So, both the primary and the secondary are going in 2 directions.

the medium toroid 5/$1 is an OK toroid, but it is not great. The choke type toroids are better. I am sure.
It is OK and may be OK enough.

@All,
I finished a table on something I was doing last week before I jumped into the Hazens non replication.

The frequency range went from
38KHz to 111KHz and the volts went from
60V to 375V. -- in opposite directions, of course.

(This is on the 3T,4T,92T that I have made all those tables on.)

I found a resistance (560r) that produces a voltage 154V  with a frequency of 20KHz. the shape of this wave is not a constant one, and looks like the resonance waves seen on barry's coilgun site. High then lower  and lower and lower then high again.

I will see what this can do. It has enough constant waves to look like ac (not a straight line with one very high occasional spike. That is what happens in the high voltage low frequency ranges)

Looks good to me.

so, now I have to make it do something...

The thing about the shape of the waves is this. While I was testing it with the pot I saw regular waves some had bumps on them, but they all looked about the same height. Then I chose a resistor in between 2 that gave me 160V and 185V. But when I put it in place the shape of the wave changed. I will try it anyway. It reminds me of something gadget said about using a pot. but this was the reverse.. Oh well, It seems there is always something unexpected.

jeanna

[Thaelin]

    Just curious, but has anyone tried to wind the first layer of the pickup coil and then just jump over the two small coils and wind the second layer? This would approximate what tesla did with his pancake which made it perform better. I am still in my work week so have no time to play.
    On winding torrids, I have found that I have to be very careful when looping the wire through the hole not to scrape it on the edges as they are usually sharp. Have scared a lot of wire and had to throw it out. This is especially true of the choke torrids out of old PC power supplies. Most of mine have been encased in a plastic cover which I remove to get the wire right on the surface of the torrid.
    And last but not least, I did notice on another board where the person had a conductor running the length of the tube to help light the gas. This on a 48" tube. May be an easy way to get more light for the input.

thaelin

[gadgetmall]

Hi gadget.

I cannot answer your question.
ALL my primaries go in two directions.
It is therefore impossible to say that the secondary is wrapped opposite to the primary.

But what I described earlier is very close to what you said about the 2 directions.

Ours are too different to relate exactly, I guess.

Anyway,
I think the thing that makes the MK designs a winner every time, is that the secondary wires go in both directions as well as the primary. So, both the primary and the secondary are going in 2 directions.

the medium toroid 5/$1 is an OK toroid, but it is not great. The choke type toroids are better. I am sure.
It is OK and may be OK enough.

@All,
I finished a table on something I was doing last week before I jumped into the Hazens non replication.

The frequency range went from
38KHz to 111KHz and the volts went from
60V to 375V. -- in opposite directions, of course.

(This is on the 3T,4T,92T that I have made all those tables on.)

I found a resistance (560r) that produces a voltage 154V  with a frequency of 20KHz. the shape of this wave is not a constant one, and looks like the resonance waves seen on barry's coilgun site. High then lower  and lower and lower then high again.

I will see what this can do. It has enough constant waves to look like ac (not a straight line with one very high occasional spike. That is what happens in the high voltage low frequency ranges)

Looks good to me.

so, now I have to make it do something...

The thing about the shape of the waves is this. While I was testing it with the pot I saw regular waves some had bumps on them, but they all looked about the same height. Then I chose a resistor in between 2 that gave me 160V and 185V. But when I put it in place the shape of the wave changed. I will try it anyway. It reminds me of something gadget said about using a pot. but this was the reverse.. Oh well, It seems there is always something unexpected.

jeanna

. Hi Jeanna . Well i am getting some =where tonight at least with the neon . If you take two wires for the primary and wind them the same way the same time its going one way . at the start of the wire from the bottom of the toroid thru the middle up and around would be clockwise so My bifilar primary is always one direction . then i start the secondary in reverse on this one that is lighting a neon . at the start from the top thru the middle around and back in the middle is counter clockwise . At least that's the way i see it  See My Mess above .. Junk ...but some of them run for weeks ., I need new proto boards cause im soldering everything i am doing .  Mk style is next on My list also . I need that Hv to light a cool Little square Floro i got from goldmine for a buck ..

Albert