Joule Thief

[jeanna]

@All

I finished winding 52 turns of 19 gauge (EDIT 22 gauge)  mag wire over the larger toroid with 11 bifilar jt style.   I get exactly the same voltage as with the very skinny 30 gauge.

So, That is not the thing making the big difference here. well that is volts. I cannot test for amps.

@jim. I used to have a conversion chart. One exists. I remember it is from one of the radio guys. Search the web for wire conversion. I'm sure you will find it.

(19 gauge is the fattest mag wire Radio Shak sells and 30 gauge is the skinniest.)

Next, I think I will cut this mag wire in 2 and configure it like the 2 secondaries from the mk1 and see if that makes a difference.

Hopefully I will be finished in under 2 hours.

jeanna

[Mk1]

@elctricme

http://en.wikipedia.org/wiki/American_wire_gauge

This is what i use as a reference.

@Jeanna

the pickup coil will have the same voltage but more current goes true a big wire so more work can be done (more amps)
I would try making more turns on the 7 turns one.

If you are taking about the 3 pack magnet wire from radio shack , it 22,26,30 my 19 is bigger than anything radio shack got.
So far the green one the 26 i think is useless, 22 the biggest one is the best.
Smaller gauge are great to get real high voltages but real low amps.

[jeanna]

My mistake. The package is long gone and the spools are unmarked. I guess I am using 22 then.

I don't know another source that sells reasonable amounts to the public.  Does anyone know one in the US?

@MK1, I already have more turns than 7 and 7. I have 11 and 11. but it is this that I am testing. I think the test will be finished tonight... I hope.

jeanna

[Mk1]

@jeanna

I just want to make sure i got you right, on the toroid of my design you changed the 2x 7 turns to 2x11,if your toroid is different it could help achieve the 60 volts , this is not for the bifilar one.

[Bob Smith]

@ Sparks, thanks for the infrared info. Food for thought...

I'm going to throw another idea out fwiw, as I'm swamped with work and don't have time to try it for a few days:  Somewhere back around page 100, mention was made of using soft iron wire windings.  Way back when, I attemped the TPU using insulated soft iron wire I picked up from Home Depot (a little thicker than floral wire, soft light green rubber insulation, sold by 6" coil). No luck. However, given soft iron's rapid magnetizing and de-magnetizing properties, why couldn't a coil of iron wire be substituted for the JT toroid?  Making the toroid with insulated iron wire, then the primary and secondary windings with the same wire might yield some interesting results. Maybe the JT configuration can be hybridized with some of the TPU ideas. I have to think about the required "kick" to get it going. Charging a cap has already been mentioned. 

A NOTE OF CAUTION: From everything I've read, the TPU packs one massive amount of potentially lethal juice.  If you get a runaway current, you can also in theory vaporize your wires.  I'm not advising anyone without the proper knowledge to try this - only sharing the idea for those comptetent in handling this kind of high voltage.

Hasta manana amiguitos.