Selfrunning cold electricity circuit from Dr.Stiffler

[Gustav22]

I want to take this opportunity to voice my highest respect for Dr. Stiffler AND 'the whole team' that has gathered in the operating theater.

...
http://www.overunity.com/stiffler/stiffler_harti03.avi

@hartiberlin
I watched your video, harti, and noticed that you use very long cores together with a relatively short coil. You insert the core so that it protrudes very far beyond the left side of the coil and stands out only very short beyond the other side of the coil.
Maybe it would make a difference if you positioned the coil symmetrically in the center of the core.
Note that Dr. Stiffler's 'magic coil' is also wound symmetrically over the middle of the core.

Thanks again to everybody.

[k4zep]

P.S. I still have a few ferrite fridge magnets laying around here.
I will later also wound 2 coils around them and try these.
Ben, did you use Litz wire for the primary coil in your magnet-coil setup ?

No for the initial device I used 300T #32 for the secondary and 50T (now reduced to 10T) for the primary, my understanding of how the unit worked at that time was faulted, have learned a lot more since then.  I believe my magnet core has very low activity (some) but not much.  Even then though, it does show small 4/1 gain. At the mw range we are working in, that is just a small but very important whistle in the dark.

In reading the next series of post down below it is obvious that a few points are being missed.  The AV "plug" theory is alive and well and is fairly easy to replicate using basically any frequency if you have high enough voltage. It is simply a longitudinal wave device and works very well as a 1 wire transducer/rectifier ETC but that is really off topic.  BUT it is also a very good longitudinal wave impedance converter for the output of the BF......

The excitation of the core of the BF AM radio core is a little more difficult to do but I see a lot of people working on it.  I also noticed someone suggested that the basic frequency was in the 14-18 MHz range and I am beginning to suspect that too as one of the units Dr. Stiffler built that self Osc. was producing a burst around 18 MHz if I remember correct.  It is early here coffee just starting to sink in.

[k4zep]

Okay, my videos are now also online at Youtube
over here:

http://www.youtube.com/user/overunitydotcom

Enjoy !

Regards, Stefan.
Good morning Stefan, Looked at your videos on Youtube NOW put the core back in and vary frequency, you should get an output on the large winding when you hit the right freq. somewhere between 4-10Mhz!  Very good work. The tuning will be fairly sharp within 3-400 KHz.  Outside that resonant frequency (resonant frequency of the BF excititation/coil) no output.

Ben

[k4zep]

Hi All,

Doing some basic looking and thinking this AM.  In playing (my wife says I'm playing) the more I realize how important the scope shots in Dr. Stifflers article on his web page are.  Everything is there that we need to know if we will just digest it!

There IS a basic resonance frequency for the BF coil/CORE device.  That is where its output is!  I now suspect that the input L/C circuit must match that frequency for maximum output.  My core resonatesor pumps @ around 8 MHZ but my L/C resonates @ 5 MHz so I see most output around that 5MHz frequency due to to the HV generated by it at that freq. in spite of the mismatch.   I must re-resonate my L/C circuit @ the base frequency of the BF core and see what happens.  I'm going to put a variable cap. to replace the 400 pf I have in there right now, give or take and see if this "theory" is correct.

I also see the burst effect where the BF coil pumps out a cycle (now you know I'm old) every 3-4 Hz depending on the input frequency....You live and die with this thing via a scope.

Actually now I'm turning off everything.  Wife wants to go to Flea Market and I am going downtown to the the annual "Strictly Sail" sailboat show in St. Petersburg, FL......150 NEW way outta my price range sailboats ($100K--Million+++) and oodles of goodles (stuff) to put on them...A man can dream....Will get back to this tonight.  Thats all for this AM.

Oh, Stefan, I like your bread-board work.....been there done that!!!!!!

Ben

[MarkSnoswell]

There IS a basic resonance frequency for the BF coil/CORE device.  That is where its output is!  I now suspect that the input L/C circuit must match that frequency for maximum output.  ... I'm going to put a variable cap. to replace the 400 pf I have in there right now, give or take and see if this "theory" is correct.

The fundamental resonance appears to come from the inductance of the secondary and the junction capacitance of the IN4148 diodes. I have attached the datasheet here. The secondary sees a complex capacitance from the two AP diodes -- however even a sinple LC resonance calculation shows that the figures agree pretty well. Here is a link to a good LC resonance calculator http://www.pronine.ca/lcf.htm.  If you want to tune further then set up a resonator on the primary side for the same frequency...

You could try to tune the two just out of phase -- this will result in the power beating between the input and output -- exactly the same as in good tesla coil design. This may work better than exact tuning as the total power transfered wont be any less but the higher voltages at the AP may reduce losses in power transfer there. It's hard to predict and the tight coupling of the primary and secondary may limit this aproach.

Whatever you do -- tuning the primary side to the same frequency will certainty reduce losses in the AP and inprove power transfer.

cheers

mark.