The bifilar pancake coil at its resonant frequency

[TinselKoala]

Did you miss this, Ramset?

By the way, there are far more negative and null results from the EMdrive experimentation than there are positive results. In addition, as the researchers like Sonny White and Paul March refine their experiments and gain expertise in performing them, the magnitude of "positive" results continues to get smaller and smaller. Of course you will choose to ignore results that do not conform to your conjectures and you will ignore the implications of results that tend to vanish into the noise floor as experimental technique is refined.

[ramset]

Tinsel
every journey starts with a step ,surely the pioneers in all these fields are looking under every stone .

You mentioned electron beam microscopes ...few years back we had a project where we were looking to buy one
seemed every scope on the planet was up for sale on EBay [tons in south Korea]
they had all become obsolete ...

turns out the guys who can see the most [tiniest] have the biggest edge ,and the guys who can't should stay home until they can.

the ever smaller world we work in ..."nano" is going to rewrite the books.

[TinselKoala]

Tinsel
every journey starts with a step ,surely the pioneers in all these fields are looking under every stone .

You mentioned electron beam microscopes ...few years back we had a project where we were looking to buy one
seemed every scope on the planet was up for sale on EBay [tons in south Korea]
they had all become obsolete ...

turns out the guys who can see the most [tiniest] have the biggest edge ,and the guys who can't should stay home until they can.

the ever smaller world we work in ..."nano" is going to rewrite the books.

Yes, I can believe that. At the place where I used to work-- you know where-- we had not one but TWO electron microscopes, one ancient SEM and one more modern TEM, and I learned how to operate both of them. The TEM, worth about 600,000 dollars on the surplus market, was actually _given_ to the lab by its former owner, a researcher at one of the national research universities there. When the researcher went on to other things, the University needed the space and so gave the TEM to whomever could come and extract it from the basement room and cart it away. So we did. And reassembled it in our lab and got it working again. Actually the TEM itself was installed in one room and its giant power supply, vacuum pumps and air compressors (for pneumatic valves) were installed in the next room, with cabling and hoses run through the walls. It is still in use today. I think the SEM is mostly used for electron beam spectroscopy these days to confirm the composition of exotic ceramics.

The ones you saw on the surplus market were of course replaced with more modern, more capable Electron Microscope instruments at their former homes.

[MileHigh]

Wow, a mysterious brown envelope appeared at my door this morning with no markings on it at all.  I am attaching a photo of the contents of the envelope here.

Will a large-signal measurement of the inductance of a bifilar pancake coil be different from a small-signal measurement of the inductance of a bifilar pancake coil?

I bet you they would be different!

EDIT:  I had to edit everything and change "capacitance" to "inductance."  It must be the the psychic energy beams from Planet Zanti that were trying to throw me off the trail!

[MileHigh]

Your opinion has been noted and added to my file 13.

Yeah, sure.  Your trip whenever you talk about Tesla or some circuit is to scold people about some supposed amazing profound significance that they have to go into deep deep contemplation to *truly* understand.  "Tesla laid out the bread crumbs for you, you just have to follow them and discover for yourself what the significance *really* is."  I have read that one too many times from you.  That's why I gave you that extended little treatise.  Your pitch is a variation on the masochist scolding that you hear from all sorts of free energy enthusiasts about clips of supposed free energy circuits that you see on YouTube.  They always say, "The inventor is NOT supposed to share his work with you!  You are supposed to take still frames from his clip and talk about them and try to reverse-engineer what you see for the next nine months!  Don't you know it's supposed to be that way?"

Going back to the "special current," things aren't always so deep and so profound that you need to sit like Buddha for 40 days and contemplate your scope traces.  So there is indeed nothing of note that is out of the ordinary with the term "special" with respect to the currents in the bifilar pancake coil.  There is no "deeper level of understanding" that can only be gained though deep thought.  If you want to go into contemplation about the word "special" for the next two years, that's your choice.

So you shouldn't throw what I said in the trash bin.  TK said the geometry for the pancake coil helps with avoiding high-voltage arcing when playing with Tesla coils.  But who really needs a Tesla coil?  At this point in time they are novelty items, there is a clip on YouTube where two Tesla coils play Sweet Home Alabama with stereo modulated high-voltage lightning bolts.  It's a big hit at bar mitzvahs.

That Tesla patent for the bifilar pancake coil has its own cult of personality.  It attracts all sorts of attention and thousands of amateur experimenters make pancake coils and play with them.  There is no elusive pot of gold.  It's just a coil.