Joule Thief

[Pirate88179]

Thats some great results   Did you order fron gadget?

No, that was almost 2 years ago.  I didn't know Al back then.  i was just attempting to point out how important the alignment of the electrodes can be to the output levels.  We learned this on the EB topics a while back through a lot of experimentation.

Bill

[stprue]

No, that was almost 2 years ago.  I didn't know Al back then.  i was just attempting to point out how important the alignment of the electrodes can be to the output levels.  We learned this on the EB topics a while back through a lot of experimentation.

Bill

When I have enough $$ for the EB kit I will need to look into this and probably ask you lots of questions.

Thanks...Stew

[hazens1]

Excelent results and thank you for posting.  Just so I'm understanding you correctly.  These are 1 layer thick (from one side to the other side, that's it! right?)

Yes, 1 layer thick so far.

[xee2]

@ jeanna

Try increasing your collector coil turns. This circuit will light a 20 watt tube. You may need to reverse the polarity of the pickup coil, I am not sure what it is.

[jeanna]

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.