Joule Thief

[hazens1]

Hi hazens1 ,
nice light output at the U-shaped tube.

How much current are you drawing in this picture from
the AA battery ?

Many thanks.

Regards, Stefan.

Amp draw is about 140ma at 1.3 volts input with the 1.6 watt tube.

@hasens1,
That is a very nice glowing tube there, well done.
Nice tight turns on the coil also.

When will you be able to miniturise the circuit so it will fit back into the fluro tube assembly holder?
That will look real pritty then, and it has a switch built in also.

jim

I wish I was as good at creating Time as I am at winding coils 
Eventually, I will get to it..

I just got sat on my ass     by my Hazens1 JT circuit, hazens, you didn't warn me it has "bite" with in it lol. To make it worse, the battery wasn't connected at all. It whacked me a beauty.

jim

Yeah, gotta watch those circuits. I'll have to start putting disclaimers on my diagrams 
I was testing the 4 inch tube and forgot I had 2 x 200v, 22uf in series on the output and I touched the tube's contacts and got a good jolt myself.

@ hazens:

Jeanna is correct.  My Fuji put out just under 400 volts and I was able to light two 48" tubes (40 watts each) with it using about 1.3 volts input.  They were not full brightness of course but still, it was a lot of light.  I'll bet your JT can do at least one of those right now.

Bill

Congrats on the Earth Battery stuff!

I'll be testing some larger tubes as I aquire them. I need to get some larger toroids too, so I can increase my output voltage and amps. I like using the 26ga since it is so sturdy and provides good amps in the output. Using 26ga, I think I'm at the limits of the Goldmine 1 incher. I could go to 28 or 30 guage, but that might sacrifice some amps on the output. I've had higher voltage before, but could not light floros. I think you need amps in the pickup as well as volts to do it.

@Hazens,
Thank you for that diagram

Now there are 2 fluorotubes. This is so exciting...
I have one of those mediums left. I don't have that transistor, but maybe it will be OK. I do have some fuji ckt transistors, but I bet the 3904 can do this.

10 ohms? that is low!
Does it get warm?

400v is higher than the fuji got the volts. I bet you could light a bigger tube with higher wattage rating.

thank you,

jeanna

Your welcome!

The 10ohm does not get warm. I could go higher resistance, but I adjusted for maximum voltage and it happened to max out at about 10ohm for this coil.

[stprue]

@ Hazens1

My best results have been with 22 and 24 gauge wire.  At 400 volt you're all set at this point the amps will make things other then lights work!

Great job, I will be replicating your latest coil!

[TheNOP]

nice Pirate88179
how long does it last ?

[jeanna]

EDIT
nevermind. I found your original post.

... I've had higher voltage before, but could not light floros. I think you need amps in the pickup as well as volts to do it.

Maybe.

The fuji transformer has extreeeeemly skinny wire (1760T secondary)  and can light the fluoro. I had the 15watt fluoro lit for 2 hours straight then 1 hour after the battery recovered and one more total with several more recovery times in between. I call it 4 hours, but 2 straight through.

thank you,

jeanna

[jeanna]

OOO goodie
I just got my 3.38" toroid!!

jeanna