Re: insulators, resonance...

> Yep.  Model.  As used means "simplify reality to the point we can 
> deal with it"  Models are not all powerful.  Case in point:  The 
> aerodynamic model that sez the bumblebee can't fly.  The bumblebee 
> ignores the model and flys anyway....  Models are powerful tools, but 
> they have their limitations...

The bumblebee model you mention obviously is a bad model since the 
theoretical results are inconsistent with the observed phenomenon, 
whereas the earth resonance and lightning theory models of the earth 
predict results that have been experimentally verified.  I'm not saying 
that's actually how the earth really works, but the model does seem to 
agree with reality.  We do seem to agree on one thing though...I am a 
firm believer that we KNOW absolutely nothing about anything; we pick 
the models that fit the currently agreed upon facts and give us nice 
equations, but we really don't know what's really going at even the 
most basic level.

> There are lotsa kinds of resonances.  Good ones (high Q) and bad 
> ones (low q) ...Electric POWER requires voltage and current...Even if 
> [the earth] is imperfectly conducting, the resonance might well be 
> seen (is seen, if the experimets are correct....)  The losses would not 
> so much affect the value of the frequency as the sharpness of the 
> resonance.  What the losses would do is make any ground current 
> portion of  wireless power scheme lossy... 

I don't think that we're fundamentally disagreeing here.  Since I'm not 
an RF power (or non-power) engineer, and I haven't seen any recent, 
reputable research on the subject, I have no opinion about whether 
actual power transmission via ELF excitation of the earth is practical or 
not, I just stated that the earth resonances that Tesla observed are 
generally agreed to be authentic and are consistent with Schumann's 
earth-ionosphere cavity model (from the Corum's and A. Aidinejad in the 
1986/1987 Tesla Journal from the Tesla Memorial Society, and others).

> They were still puzzled by the 25H.0z.  So i told them to think about
> the AMTRAK NEC which runs trains to Washington on 25Hz.  They 
> seemed interested...

Nothing is ever easy, is it?  We were setting up an experimental CCD 
XRay imaging system in the lab here, and we were getting very noisy 
images.  First, I found that the switching power supply we were using 
was putting out a lot of the noise, but changing it still didn't get rid of all 
the noise in the image.  Finally, I took the FFT of a line from the image 
and found a very pronounced peak at 60 Hz. Better power supply 
filtering and shielding finally got rid of most of the noise, but there was 
always a small but noticeable 60 Hz component in the images that we 
could never get rid of.

Steven Roys (sroys-at-radiology.ab.umd.edu)