Is joule thief circuit gets overunity?

[profitis]

@tk you dont have any old junk circuitry lying around?like old computer parts?try it with your 33uf and see if it works tk,perhaps it,l work better.at this stage we have no explanation for this effect,if your cap can visibly make the meter bounce 1 or 2 micros when closed then thats the one to chop open.we want to see if it chopping open gets us a boost.we want to explain this mysterious effect.     

[TinselKoala]

Like I said, I am not willing to waste a hard drive looking for your square tantalums, and the only other tantalum capacitors that I have ever seen on PC power supplies, etc, are the droplet or cylindrical types. I'll cut open one, ONE, of my 33 uF droplet or cylinder types for you sometime later today.

[Void]

@Lawrence: I have received your JT boards in the mail, and as soon as I get a chance I will run some power measurements on your boards and post the results here in this thread, if you like. Other than basic power efficiency tests at say an input power supply voltage of 0.5V, are there any other specific tests you would like me to run on the JT boards you sent me? I can also run comparison power measurement tests with a super capacitor as the input power source, and with a battery as the input power source, to compare results.

Edit:
A quick preliminary test on board #'s 118 and 119 (with the DC offset on my scope channels first checked for calibration) shows no zero crossing on the input current waveform, as would be expected. The waveform shapes appear to be pretty close to what I see on my JT circuit, with one difference being that Lawrence's boards run at a lower frequency than my JT board. I will run full power measurement tests on these boards as soon as I get a chance.

[profitis]

@tk thanx ,put one wire on the exposed black half and the other on the exposed grey half,directly.what do you see?

[ingyenenergiagep]

"i replicate JT several times and found out that Eff is less 80%."

Try higher voltage, 555 IC and FET.