Quote from: OilBarren on March 27, 2008, 10:06:19 PM
I INTEND TO PURCHASE AN EVEN MORE ACCURATE ON WHEN THE STORE HAS ONE IN STOCK.
http://www.tes.com.tw/prova11.htm

Don't waste your time and money on a new clamp meter. The clamp meter approach is not sensitive enough for what you're doing. Get a really good true rms multimeter with the right AC current ranges, and use that in series with your power supply. For example the
Fluke 287 True-rms Electronics Logging Multimeter with TrendCapture . You'll get 0.6% accuracy and you'll get resolution right down into current levels way below what you're running at.

Another way to measure these very low currents with the accuracy and resolution required is to insert a precision series resistor (sense resistor) in the supply and to measure the voltage across it directly with a precision voltmeter. If the resistor is +/- 0.5%, say, and the voltmeter is +/- 1%, then you'll be able to determine the current to an accuracy of +/- 1.5%. This is the same as the quoted accuracy of the clamp meters with the advantage that the sense-resistor approach allows you to measure down to much lower current levels so that the measurement is no longer obscured by experimental error, which is what your problem is right now. Furthermore there are no doubt voltmeters galore with this accuracy or better at the U there so you won't have to go out and buy one or wait for availability.

But for sure forget the clamp meter: it's not the right tool for this job.

PB

Quote from: polarbreeze on March 28, 2008, 07:58:50 AM
Indeed it is. You didn't answer my question. Were these results reviewed by Dr Habash?
PB

Perhaps he didn't answer your question because it was rather oddly and uselessly directed at me?

Quote from: JustMe on March 28, 2008, 01:19:58 PM

Quote from: polarbreeze on March 28, 2008, 07:58:50 AM
Indeed it is. You didn't answer my question. Were these results reviewed by Dr Habash?
PB

Perhaps he didn't answer your question because it was rather oddly and uselessly directed at me?

The question was directed at Thane. He told us that all results are reviewed on a daily basis by Dr Habash. I was looking for confirmation of that for these particular results because I was surprised that they would pass muster with Dr Habash since they are completely obscured by the margin of experimental error.

PB

Quote from: OilBarren on March 27, 2008, 10:48:26 PM
I FORGOT TO MENTION THAT MAGMETALS INC HAS SUPPLIED LUC WITH TWO TOROID CORES WITH A RELATIVE PERMEABILITY OF 200,000 - THE ONES WE ARE CURRENTLY USING ARE 17,000.

I believe you said the other ones were professionaly wound...will that be the case this time?

Quote from: markzpeiverson on March 28, 2008, 03:52:51 AM
To add to aether22's comments on zero-point energy (ZPE)...
...

"Blanco et al. (2001) have proposed a method for enhancing the ZPF-induced voltage fluctuations in circuits. Treating a coil of wire theoretically as an antenna, they argue that the antenna-like radiation resistance of the coil should be included in the total resistance of the circuit, and they suggest that it is this total resistance that should be used in the theoretical computation of the ZPF-induced voltage fluctuations. Because of the strong dependence of the radiation resistance on the number of coil turns (scaling quadratically), coil radius (quartic scaling), and frequency (quartic scaling), these enhanced ZPF-induced voltage fluctuations should be measurable in the laboratory at quite accessible frequencies (100 MHz compared to the 100 GHz range necessary in the Koch et al. experiments)."
[/color]

Good stuff. But considering that the ZPF effect requires frequencies of 100,000,000 Hz (Blanco) or even 100,000,000,000 Hz (Koch), even to obtain what they call "minuscule" results, and that they quote the frequency dependence as quartic (ie fourth power), what is the probability that this effect has a bearing on Thane's setup, which is operating at only 60 Hz? I think the calculation would be that at 60Hz the effect, if it exists at all, would be about 20,000,000,000,000,000,000,000,000,000,000,000,000 times smaller than what they're already calling "minuscule".

Whatever the effect is that Thane's experiment is demonstrating, I think it unlikely that it is related to ZPF. It seems much more likely that we're in the realm of more conventional EM theory.

PB