Joule Thief

[Pirate88179]

Jim:

Thanks for your kind words you posted on my youtube video of the 48" tube lighting from the EB/JT. As you saw, I was taking a bit of a beating from that guy that says he is an EE who said I could never light anything from an EB because they only put out microvolts at best.  I wonder how he thinks I lit the tube in the video?

Oh well, thanks for the support mate.  I really do appreciate it.

Bill

[petersone]

Hi TheNOP
Reference to the vid that Mk1 posted http://www.youtube.com/watch?v=kQdcwDCBoNY&feature=channel_page,although the numbers maybe off,does not the fact that the bulb on the secondary is lit,and the bulb on the primary is not lit, show ou,if not what am I missing.Assuming no trickery.
peter

[altrez]

Hi TheNOP
Reference to the vid that Mk1 posted http://www.youtube.com/watch?v=kQdcwDCBoNY&feature=channel_page,although the numbers maybe off,does not the fact that the bulb on the secondary is lit,and the bulb on the primary is not lit, show ou,if not what am I missing.Assuming no trickery.
peter

Peter,

I am a bit lost on this experiment. Perhaps you can help me to understand how this would be OU? It looks like magnetic inductance to me?

I have been playing with the idea on my JT setup. If you hit the right frequency on a coil a secondary coil will pick up some power. I just do not see what its ou?

Is the power coming from the function generator he is using?

Thanks!

-Altrez

[altrez]

@all

I have another question. In the video he talks about a resonantly tuned LC circuit and yet he fails to mention how he got it resonantly tuned?

It looks like he simply took some wire warped it around a ferrite rod attached one end to a cap and then the other. Clipped on a function generator and adjusted the function generator until enough current was pushed in the wire to light the bulb?

At that point he added a different coil that looked to be wrapped the exact same and moved it close enough so that it would couple?

Perhaps I am totally lost here and I feel really dense. I would just like to understand how you make a resonantly tuned coil? Is it so simple that I am over complicating it?

I understand that by changing the frequency on the coil you make it resonate what I do not understand is how that is OU?

Thank you all so much!!

-Altrez

[petersone]

Hi Altrez
I'm lost also,but as I understand it,the power is from the frequency generator. He said that the 2 coils with caps were tuned to the same frequency,but they looked completely different,it looks to me to be ou,but not to you,I'm only going by the bulbs,one is not getting enough to light it,but the other is.The only way I can think of that would make that happen is if the first bulb is not getting enough voltage,but transformer action on the second bulb ups the voltage to light it,I am far from an expert,so have probably got it wrong.
peter