Joule Thief

[jeanna]

Thanks Mark,
You were the one who first turned me on to the mag amp.

The way they are designed now is not going to work because they use the mains ac power supply.
That is my understanding, and may be wrong!!!!!
I am wondering if you have tried to make one and if you ever had any success?

I am picturing a dual core with the primary wound completely onto one as usual, and only the collector coil wound on the other.
If I can hand start it the way jonny davro is doing with the pans, then the one with both will oscillate (and be the ac toroid)  and the one with just the collector coil will be steady (and be the dc toroid).

Do you have thoughts on how to make one without the mains?

jeanna

[innovation_station]

well i just finally finished unsoldering the last tip ... and im sick of em ...

gotta be at least 90 of em in there

i had an idea yesterday ...  but gadget mk1 or j should build it!   or i will ....  but it dont matter how many things i build ...  same story ... 

any how this is the idea a toroide tuning  unit ... you hook up your coil to it find where it is best tuned ... in freq for desired operation be it oscolator tpu timeing unit wave generator led lighting device cap charger it is a pot some hook ups maybe a varible cap ...  just a stupid simple unit the coil tuner ....  then fix the resistance and wattage of choise ...

could throw a bridge in it too so you can read for best rectified voltage ... i may build a simple unit as i could use one any how ...   we could build into it a place where TRANSISTOR COULD BE PLUGGED AND PLAYED ...   i mean a compleat coil tester / tuner unit ...  i will build a few with battery holders the hole bit ... the black cadilaic ... leggs high in the back!   LOL : )

w

btw J   i have a bunch of speciality vhf cans .....  just like the 2n2222a cans ...   but some even have gold leads ... wich could be bronze ...  who knows ..  i have not even thought of looking at those units yet ..... there a few diffrent ones ... all cans some got some kind of heat sync / protector thingie on them

has anyone ever wondered about the 2N series ...  2 nano second ?   maybe its important .... maybe 1 works well too ...  ?


i found some extreamly nice multi turn pots ..  0-5k 6 - ?  k  i have a few diffrent ones ..

[innovation_station]

well i started to build the basic jt tuner for use with W and J core jt's

this one is a NPN 3055 can tuner reccomended for 1.5 - 3vdc. source  for testing and tuneing uses ...

will include built in diode to mesure out put voltage ... other units could include secondary testing mesurement points ...  this unit is strickly jt CORE TUNEING / TURN COUNT TUNEING UNIT!

it will only include a pot 3055 diode a battery holder an on and off switch ... 

so it is half done ...

ist!

i will put 2 out puts for mesurements 1 for a scope and other rectified for volt meter!

: )

[xee2]

@ ist

well i started to build the basic jt tuner for use with W and J core jt's

this one is a NPN 3055 can tuner reccomended for 1.5 - 3vdc. source  for testing and tuneing uses ...

will include built in diode to mesure out put voltage ... other units could include secondary testing mesurement points ...  this unit is strickly jt CORE TUNEING / TURN COUNT TUNEING UNIT!

it will only include a pot 3055 diode a battery holder an on and off switch ... 

so it is half done ...

ist!

i will put 2 out puts for mesurements 1 for a scope and other rectified for volt meter!

: )

Great. Since you have a good dual channel scope you should be able to get some good data that most of us are unable to get. It would also be interesting to get some scope shots of the voltages across the base resistor when there is a capacitor across it. I am looking forward to your data.

[xee2]

somebody try this idea ?
to transform again low voltage, but higer curency
I feel its should be about >1 efficiency and easy measureble
maybe Ill try it

Yes. Lidmotor made a video. It work well.