Joule Lamp

[JouleSeeker]

Merci beaucoup, Nerzh! 
Like Lynx and you, I've built a bunch of these BO circuits also.  Fascinating.

Happy hunting to both of you!  pls keep reporting here if you would; too many threads are a tad hard to follow IMO.

On va voir s'il y a quelque chose d'interessant ici;  je pense que Oui.

(Again, my today's vid on this fun stuff is here:  http://www.youtube.com/watch?v=v0WSrcWDy3c&feature=youtu.be )

[NerzhDishual]

Hi Lynxsteam,

I do like:

.... they are amazing because they defy the things we have been taught. ....

Come on!
No transistor. No resistor. No Capacitor!
... A piece of tape.
... It is pretty remarkable/interesting.
You bet it is!

You should be kidding!
And you are not!

Who are you Mr LynxSteam?
Are you a kinda magician?
IMO, you deserve any "experimenter prize"!

For the moment I have to sleep...

Very best,
Jean

[NerzhDishual]

Hey Prof. S. Jones!

Your French is pretty good indeed!
How comes you learnt this silly language?

Very Best,
Jean

[Lynxsteam]

Wish I could speak French!

In regards to my "No Transistor" video.  I moved the base alum a bit and then couldn't replicate my own experiment.  I tried everything until I accidentally shorted the base to the collector.  Touching the Alum to the Zinc gave me enough continuity to start oscillation, but the major component was 12 volt DC.  Turns out that bulb will light with 12 vdc.  The AC component was vicious and burned my fingers even through the insulated wire. 
I am sure this is an area to explore but I believe in the end more components would be required and there is no need to make something simple a lot more difficult.

So then I went back to my original idea of using the small signal transistors - NPN type instead of the NPN power transistor.  They handle high frequency better.  Last night I paralleled two of them with very good results.  I also think having an aluminum plate at the end of a solenoidal coil is a bad idea due to eddy currents, so that mounting bracket is getting changed.

If you guys were replicating all my mistakes you would be getting irritated by now.  A couple more refinements and I will publish this updated LJL.

[JouleSeeker]

      In my previous vid, I showed the Lynxsteam "cranberry" open-core and results of 107 Lumens/W.  Pretty good -- Lynx noted that there was an aluminum cover on the bottom of the coil holding the 2N3055 which could rob output power due to eddy currents in the aluminum.

     So today I removed this Al cover from the coil axis, placing it outside (along-side) the coil where the B field is small.  The result  shows an improvement in efficacy; primary tapped at winding 75, and I placed 2 ferrite rods in the air-core:

12.8 V  0.332A  ->  4.25W    463 Lumens (with 5 bulbs)   463/4.25 = 109 Lumens per Watt!

Congratulations once again, Lynxsteam!