Second Stage Joule Thief Circuits

[tysb3]

Hi
@ all

I replace IRF630 to IRF614.
Looks much better.
The pulses package is now almost twice as long.

[tysb3]

Hi,
@ all

This is some video:   http://www.youtube.com/watch?v=01kHpPcjPDI

You can hear sound when feedback pulses package is going
First JTs curent is about 0.5 ma

[tysb3]

Hi
@ all

I blow up my mofsets
and return to bipolar transistors.
It's looks working in similar efficiency with high resistens R2
Pulses package is shorter.
T2 parameters is critical. I try to wind JT coils to T2 - unsuccessful with this circuit parameters.
Looks need more inductance in the coils maybe 

[tysb3]

Hi
@ all

Some photos, some video

http://www.youtube.com/watch?v=n7g9Wq0f03o

[tysb3]

Hi
@ all

It's still not OU,
but maybe we are closer

http://www.youtube.com/watch?v=KV_DWJ7CB44

Now I have allegations about... triple    .........