PhysicsProf Steven E. Jones circuit shows 8x overunity ?

[LarryC]

the question is the sampling rate for v * i. For example, a hardware arduino board has an internal clock of 16kHz. In case this circuit has a frequency of a couple of MHz then you are only sampling aprox every 1000th value. Far from precise enough(imagine the luck you are skipping 60% of the negative values). You might get lucky to tune in to some function like pattern for positive values for the osciloscope value smoothing ( avarage) function to aproximate a better value then it is actually.
This is why a simple collect and measure the amount principle works better even if the result is not so pleasing then a bad measurement.

No luck needed. The scope is 50Mhz. Note the time column change of .000000001 seconds per observation. All so note the scope graph and the spreadsheet graph is the same.

An associate has a EE Masters and downloads data the same way on his home scope.

Regards, Larry

[Tudi]

@LarryC: i don't want to argue about your skills to measure something. I'm a software enginier, and from time to time i strugle with heisenbug ( http://en.wikipedia.org/wiki/Unusual_software_bug ). Simply saying that measuring something so small, sensitive in a world that is not prepared enough for it, might make it look different then it is in reality.
Just make 2 circuits and try to see if the thing scales=simple math rules apply to the presumed values.

[NickZ]

   @ All:
   I built a few of these Hartley oscillators circuits to use with my cement battery cells.  I don't have a scope so I've been trying to see which circuit outputs the most light, and can work with the 50 mAs that the cement cells can produce.  Most Jtc will not work, they simply consume all the available energy and the leds get dim almost immediately. So, I've been working with the backwards Jt to see if there is any benefit, as they are more efficient when using low amp circuits.  But I still find that even the Hartley circuits are hogs, also, when connected to the cells as a source. The big advantage that I can see is that they do self run, to a degree, and do feed back to the battery, or otherwise the leds would go out after a day or two.  The real trick is to balance the led's load consumption with the amount of feed back going to the battery,  thus keeping the led(s) lit,  24/7. 
  I have replicated Koolers tiny Backwards Jtc (first picture), and is still the best and the smallest of all the ones that I have working so far.
  I use a kn2222A trans, a 103 cap, 2 to 5 k trim pots, and no resistors, at all. 
                         NickZ
 

[xee2]

and can work with the 50 mAs that the cement cells can produce. 
 

Do you mean 50 uA instead of 50 mA?

[NickZ]

   @ Xee:
  All my latest cement beach sand cells produce 55 to 65 mA each cell, not micro amps.
  The last picture in my previous post is of a capacitor can cement cell, it outputs 55 mA, 1.2 volts).  Most of the larger aluminum beer cans output 65 to 70 mA, 1.4 volts.
  These cells will not connect in parallel, only series.  I've gotten over 10 volts from them so far, by using 8 cells.