Joule Thief

[xee2]

@ jeanna

I am not sure the biggo is very high flux still, but I did get it to work. The turns are
2TB, 10C,240T
150ohm Base resistor
from (between] the secondary wires:
246V
4.76kHz
It lit the neon (yeay  )

Seems like progress to me. You can try using 3 volt battery. Also, if there is no oscillation with more turns on the collector coil you may need to increase the base resistor value. Sorry you are having so much trouble.

[jeanna]

@ jeanna

Seems like progress to me. You can try using 3 volt battery. Also, if there is no oscillation with more turns on the collector coil you may need to increase the base resistor value.

Yes, progress it is.
3 volt, probably, but I would need a gold bar in the EB to get that much from the ground... (too pricy if you know what I mean!  ).

hmm increase base resistor value. I will try that too.

Sorry you are having so much trouble.

It doesn't feel like trouble when I am learning and moving forward with the learning!

Thank you,

jeanna

[gadgetmall]

Hi xee,

There is no room on the MK1 with the 3T4T92T that lit the neon yesterday.

I have been messing around with the biggo today. I actually had some results and it was partly from adding more turns to the collector... but not too many turns.

I am not sure the biggo is very high flux still, but I did get it to work. The turns are
2TB, 10C,240T
150ohm Base resistor
from (between] the secondary wires:
246V
4.76kHz
It lit the neon (yeay  )

When the C had 15T or 20T the voltage was the battery. There must have been no oscillation and the transistor got hot so it was full on, but my guess is it didn't go off ever.

There were many ways that this core produced less than 50v and even as stated 1.2v. It seems finiky.
No fluoro yet. I stopped this post to try your circuit, but no go. I wonder if there is some way to push a little extra voltage to start it up.

I think I got farther than anyone else on the AAA fuji because when I asked for help no one came forward, if I remember right. I remember that I could get the light to go on if I did something that involved the upper wires where the cap was.


@Gadget, you put a special switch on your fuji cfl mod for when the battery was getting low. Is there a loop here. It seems similar to what xee just had on his circuit today.

I had to order some stuff yesterday and I remembered a tip31c so I can try that next week.

thanks,

jeanna

Edit:
It occurs to me that I have been tuning my cores thinking I am tuning them to the ferrite only but I am also probably tuning them to the transistor.
Maybe the tip31c will be able to handle more collector turns and maybe if it does, it will produce more voltage.

Hi jeanna . My kick switch in parallel to the resistor also you will get way better volts from adifferent transistor ie tqp31c or even 2n3055 . you can run a2n3055 with very low volts but some of the jap knock offs are suckish and wont oscillate below 1.6 volts others like mine  will go down to 0.6 volts
gadget

[altrez]

@all

I have tested my 900kV stun gun on a 48inch tube and it works! Its only about 1/8 of normal brightness. This brings me to my next question. If in fact the stungun's transformer is producing 900kV what hope do we have of ever lighting a 48" tube with a JT to full brightness?

-Altrez

[TheNOP]

I have tested my 900kV stun gun on a 48inch tube and it works! Its only about 1/8 of normal brightness. This brings me to my next question. If in fact the stungun's transformer is producing 900kV what hope do we have of ever lighting a 48" tube with a JT to full brightness?

it probably does, without a load.

same thing happen with tv flyback transformers.
they are ~35kV, but under a "short" conditions the voltage drop drastically.