Joule Thief

[conradelektro]

To innovation-station !

Thank you for your air coil revelations, that helps me to see what I did wrong. Today I am learning a lot!

Just to make sure that I got it right, please see the attached drawing. Is this what you meant?

Can I slide the bifilar L1+L2 over the secondary L3 or is it better to wind L1+L2 directly on the secondary L3 (and such keeping the distance to a minimum) ?

Should the rather short L1+L2 be at one end of the long secondary L3 (like the pancake coil on a Tesla-Coil) ?

Greetings, Conrad

[guruji]

Hi Conrad I am posting you the slayer circuit but even with one transistor a 2n3055 would reach 1000v. It depends on base windings. Try to play with base and collector windings; there are spots which give very high voltage. If you do a capacitor with a pot to a resistor on the base as Gadgetmall used to do would be better too.
Enjoy.

[innovation_station]

the drawing is what i have termed a basic ali coil ..

yes all seams correct in your drawing ..  if you shorten your spool to 6 turns  3 turns bifillar  you will increase magnet strength  and  i think depending upon the freq .. of the coil you could move the collector .. or secondary  or incorperate larger ring loops 

this may be possible ...  to tune the jt to the proper resonant of the reciever rings  BASED UPON SIZE ...  and  perhaps  harmonics of the same ..

ist

[conradelektro]

Thank you all for your help (innovation_station, guruji, giantkiller)!

It will take me some days to digest and to implement the inspiration received and I will report back with my results.

A few weeks ago a first round of advice in this forum taught me how to build basic Joule Thieves up to 400 Volt and today I got jumpstarted beyond that.

May the Kilovolts jolt my slow brains to a higher level of thinking!

Greetings, Conrad

[Pirate88179]

Conrad:

IST is right about tuning to your toroid.  Very important to do so.  I believe Jeanna used a 1" goldmine and got over 1,000 volts just to show that it could be done on a smaller toroid.  I don't think she used the Slayer circuit, but, it was a while ago and maybe she did.  The more turns on the pick-up coil, the better.  Even on my large toroids I have usually around 330 turns give or take.

Best of luck and keep up your great experiments.  We all still have much we can learn about these circuits I believe.

Bill