PhysicsProf Steven E. Jones circuit shows 8x overunity ?

[Mk1]

@Joule seeker

I see one more improvement that could be done , Variable cap to tune the Freq .

[JouleSeeker]

@Joule seeker

I see one more improvement that could be done , Variable cap to tune the Freq .

Appreciated and noted.  Lots of opportunities for those "playing" with this circuit.
I'm most interested at the moment in double and triple-checking the Pout/Pin results.

[JouleSeeker]

@ JouleSeeker

I am sorry if I misunderstood how you are measuring the output power. But how can you measure the whole cycle using a scope? The voltage on the scope is only valid at one instant of time and changes over the cycle. This is how I measure efficiency > http://www.youtube.com/watch?v=smOiVmKv9f8

I take a time window (2useconds typically) in which there are many cycles, to acquire a good value for the Mean power, both for input and output power.  Let me explain further:  the Tek 3032 math multiply function allows me to get INSTANTANEOUS power by multiplying for me Vin (t) * Iin (t) -- and this power waveform is plotted (red waveforms above).  Then the MEAN is extracted over numerous cycles.  Same for Output Power. 

Again, I'm seeking non-oscilloscope methods to triple-check the Pout/Pin observations.
Thanks Kee2 -- I followed your posts on the JouleRinger especially, months ago, which inspired developments of this circuit.

[JouleSeeker]

Here is a replication video from User itsusable:

http://www.youtube.com/watch?v=vV4xMeZ_41Y

Seems it is not so easy to measure the output power in his case.

Regards, Stefan.

I appreciate Itsu's efforts (vid).  VERY true -- "it is not so easy to measure the output power in his case."  Again the importance of non-scope methods to check and verify.

@hyiq:

Only one way to show this is OU, is to self-power then power a load if possible. Measuring this type of wave form is always going to be a problem even with the most sophisticated equipment.

If it self Powers itself its OU. Its easy to get ones hopes up and then be let down by a silly measurement error. I have done it before. All the Best Professor and keep up the good work.

  Self-powering is a great method and demonstration, certainly.  The problem here (so far) is that the output power has a substantial AC component to rectify, also the output voltage (@ approx 7 volts using DVM, across  9.7Kohm Rout ) is larger than I like for the input Voltage.

Yes, I would like to see a self-running device, but I do not think this is the ONLY method of verification.  See alt methods I'm pursuing (discussed briefly above).

[Mk1]

@Joule seeker

Maybe it is time to recycle the OU term , maybe recycling energy could be a better greener image , for over efficiency circuits.