Joule Thief

[stprue]

I chose the largest High Flux they had in stock. I wanted a lower perm, but they did not have in stock, so I went with this one.

Ok, I was just wondering after looking at a few other options for the same toroid.  What do you think...750v... 1000+ 

[stprue]

@Jeanna

Thank you for the links they look like there is hours upon hours of good stuff to read and look at.

[jeanna]

the thing about experimenting is you have to try new things, cant stick to one thing or its not experimenting. and this forum is definately doing just that, experimenting!

Yes.

I missed saying this quite the right way.

If you did it, and it looked interesting to someone else, that person would try it and then next one then again. OR if you tried it and someone helped you get it right, then someone else might want to try it too.

It is a more organic approach than a suggestion, because I am positive that the good folks on this thread have many ideas yet untried and will simply not get around to it... before you that is.

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@2N3055
It simply does not work with one battery in this application.
Period.
I even used a lithium AAA which has 1.72v right now.

I have 2 of these 2N3055. One says HV after the 3055 part so I used both of them.

The thing is set up fine but the BJTLed does not go on unless I use 2AAA and my 2AAA at the moment has 2.64v.
I used 2 resistors 150r and 500r.

And even then when the BJTL goes on with the 2AAA batteries, there is no activity in the secondary. NONE!!!

And, this is NOT the new toroid. This is with the tried and true MK1 that I have made so many tables about 3T,4T,92T. This MK1 works and works well, too.

Humbug.

jeanna

[xee2]

@ jeanna

I used 2 resistors 150r and 500r.

This is with the tried and true MK1 that I have made so many tables about 3T,4T,92T.

The 2N3055 requires moe current to work. Did you try this with a 10 turn collecotor coil and a 50 ohm base resistor?

[Artic_Knight]

Patents normally don't give many quantitative specifics, but Tesla's wireless power patent does give some about the big prototype power-transmission tesla coil (which was, incidentally, used to conduct a demonstration before skeptical patent examiners). A 50,000-volt transformer charged a capacitor of .004 mfd., which discharged through a rotary gap that gave 5,000 breaks per second. The eight-foot diameter primary had just one turn of stout stranded cable. The secondary was 50 turns of heavily insulated No. 8 wire wound as a flat spiral. It vibrated at 230-250,000 cycles and produced 2 to 4 million volts. This coil evolved into the huge experimental magnifying transmitter Tesla describes in his Colorado Springs notes.