Selfrunning cold electricity circuit from Dr.Stiffler

[xee]

Ben,
Well, I thought I saw a mistake, but they seem to be OK. You should probably check for yourself to be sure. It has been a while since I have done this kind of thing.

[hartiberlin]

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.

Hi Mark,
many thanks for posting the 1N4148 spec PDF file.
I didn?t know, that they are this fast( about 4 ns switch time), I thought
they would be as slow as a normal 1N4007...

I have at my  Avramenko Plug LED just DC voltage behind the
1 x 1N4148 diodes.

Ben, how much voltage do you have there with your  design,
when you draw 25 milliamps ?

What is the maximum power output you can draw from the
AP via a constant load resistor ?
Many thanks.

P.S: Dr.Stiffler has so far put great effort in documenting the circuits
and effects, so bear with him,if he did not yet publish all.
It really takes times to document it all and we arenow still in the
phase to find the right parameters,so documentation comes at the
last step..

[hartiberlin]

Here is  an interesting 20  Mhz function generator
with all circuit board PCB layout and all you need to know
to build it with the MAX038 IC.

If you squeeze it it can also go up to about 25 to 30Mhz the author
said...


http://alternatezone.com/electronics/hsfg.htm


Regards, Stefan.

[xee]

Ben,
I suspect that L1 adds enough inductance to force the impedance looking into it to be inductive. Then C1 cancels the inductive reactance so that the impedance looking into C1 is pure real at resonance. This allows more power from generator to be used since all of the voltage is going across a real impedance. I no longer have a lab so I can not check this myself.

[k4zep]

Hi Gang,

This is getting deep fast!  Got to do some thinking.  Right now I'm hitting a wall on the device.  Too bad I had to get rid of my lifetime of reference material when I moved to the condo in FL.  Now I have to use NET as reference source.  Sometimes knowing what to ask is as hard as measuring it.

Output is pretty easy to measure across the low impedance of the AV plug/LED/Cap device, Input is a BITCH!  There is series Inductive and capacitive reactance and the resultant phase shift or lack of it!  Then there is the actual waveform @ the input. Then too, what do you use as the common to keep it real!  Does it all reflect back across the L & C reluctance too and Through the generator to ground or the parasitic capacitance to ground.  I haven't worried about complex nodal RF circuits in 40-45 years. .Probably easiest way would be to build a good simple unity FET RF driver with good isolation and decoupling and measure pure DC power into it like Dr. Stiffler does......Arrrrrrrgggggggggggggggggggg. Charley Brown.

Ben