Testing the TK Tar Baby

[TinselKoala]

In the second NERD paper, page 2, Table 1, the value of the "shunt" or current viewing resistor is given.

4 ceramic wire wound 1 watt resistors 1Ω each, placed
in parallel. Resistance therefore = 0.25Ω. L = 110nH.

One hundred and ten nanoHenries.

In the video of the demo, the apparatus is shown and these resistors appear to be ordinary power resistors of the common "ceramic" wirewound type. However they are not 1 Watt but rather 10 Watt resistors. Yet the paper appears to be describing the same experiment and apparatus shown in the video.

Perhaps this is yet another typo.

Strange, though, that nobody has told me that my CVR is using 10 Watt resistors where I should have been using 1 Watt. Therefore, the preponderance of data suggests that the NERD device did in fact use the 10 Watt resistors in the paper, since they certainly did in the demo video.

I measured the inductance of one of my resistors and it measures 7 microHenry. Therefore, calculation says that the stack should have 1.75 microHenry inductance, and in fact the meter gives me a value something under 2 microHenry for the stack in place on the board. That would be 1750 nanoHenry or well over ten times the inductance reported for the same parts by the NERDs in the paper.

I've made a video illustrating these measurements, including "calibrating" the Pro'sKit meter against commercial loads of known (labelled) inductances.
It's uploading now and will be hidden in the usual hiding place.

Clearly.... there is a discrepancy somewhere. How did the NERDs get such a low inductance value, using the same kind of resistors as I am using?
Either their common-appearing wirewound ceramic power resistors are different in some hidden way, or they used different resistors altogether than what was shown in the video, or.... their reported inductance reading is wrong. Once again, a simple 5 minute video showing the same things that I show in the present video would answer the question once and for all. Use the Ainslie inductance meter to measure some marked, known inductances, then measure the questionable inductances. Simple and definitive. Here is where I remind the readers that no calibration data whatsoever has ever been shown by the Ainslie team, and in fact they have reported temperatures of 104 degrees for boiling water, without blinking an eye.

The resistors can be seen fairly well in the shots attached below.

[MileHigh]

TK:

Do the NERDs list the part numbers for the resistors somewhere?  They may be counter-wound non-inductive resistors.

MileHigh

[WilbyInebriated]

TK:

Do the NERDs list the part numbers for the resistors somewhere?  They may be counter-wound non-inductive resistors.

MileHigh

milehigh... on the prowl.  *splat* *splat*   time for you to scavenge for some restaurant napkins, hopefully unused.

[evolvingape]

.

[evolvingape]

temperatures of 104 degrees for boiling water, without blinking an eye.

http://www.youtube.com/watch?v=a01QQZyl-_I