PhysicsProf Steven E. Jones circuit shows 8x overunity ?

[xee2]

COMMENTS ON DR. STEVEN E. JONES CIRCUIT (using hyiq schematic)

This circuit has an advantage in that almost all of the energy in the collapsing magnetic field of L2 is transferred to C2. Where as in a normal Joule thief some of this energy is returned to the battery. This is a result of the resistor VR2 preventing rapid current flow back to the capacitor/battery and thus forcing the energy into C2. However, in order to be over unity the energy in the collapsing magnetic field of L2 would have to be greater than the energy used to create the magnetic field. This would conflict with historical experimental data on energy stored in magnetic fields of coils.

[nul-points]

COMMENTS ON DR. STEVEN E. JONES CIRCUIT
[...]
This circuit has an advantage in that almost all of the energy in the collapsing magnetic field of L2 is transferred to C2
[...]
However, in order to be over unity the energy in the collapsing magnetic field of L2 would have to be greater than the energy used to create the magnetic field. This would colflict with historical experimental data on energy stored in magnetic fields of coils.

hi Xee

you might be interested in the results and calcs in the previous post before yours, then

[Tudi]

null-point : awsome work. Any chance to create a second circuit like first one ? instead looping just attach C2 in to C1 out. I'm not expecting to get some specific output at C2, just curious what will happen. Thanks.

[Hoppy]

I have had the "glitch" in one session on the Tek 3032 myself a while back, where the circuit was performing very well, n>1 per the Tek 3032.
  I made measurements of Pin and Pout repeatedly, back and forth, and kept getting n>1 for about 45 minutes, varying Rr and Ro, and getting variations in n but always n>1.   
Then all of a sudden, it changed for unknown reasons to n<1.   Sorry I did not mention this sooner -- I thought the "glitch" was for it to fall out of the super-efficiency condition temporarily, or perhaps I caused an inadvertent short in the system -- I could not find what made it glitch.   Later, it looked fine again.

I experienced the same problem where initially I saw a unity reading. I think this is a triggering problem. Its important to get the trigger set where the mean voltage reading across the shunt resistor is as stable as possible. If you monitor the readings at various different triggering points, I think you can find a nice overunity spot!

Hoppy

[xee2]

hi Xee

you might be interested in the results and calcs in the previous post before yours, then

133 uW in and 52 uW out seems like reasonable performance for a Joule thief. The rest was not clear to me. I will have to look at it for a while.