Here it would seem the paths can go in many directions ,Evostar is exploring a path more inline with his topic here, TinMan has posted an effect also  and Partzman is exploring his ongoing [years long] MEI work with Bifilar coils ...

there will be another thread here to focus more on A Partzman MEI build that all can replicate to get an "effect" to play with.

hopefully by tomorrow ,

it will also be in the moderated section here.

respectfully
Chet K

I had the opportunity to get away from the bench and think about this some.  Tinmans original observations pertained only to current flow in input resistor vs. resistor in center of coil.  He made no claims as to overunity.

In fact FG voltage * input resistor current is approximately equal to output voltage * output current in my experiments.

So, overunity no, odd behavior due do to distributed capacitance yes.

Quote from: MileHigh on May 02, 2017, 06:30:57 PM
Partzman's testing and attempts at replication are interesting and a worthwhile exercise.  However, this is at best indirectly related to the bifilar pancake coil.  Just look at title of his schematic, "Bifilar Pancake Transformer."  It's not a coil, it's a transformer.  I still encourage this discussion on this thread.

The transformer discussion has pretty much hijacked the real purpose of this thread.  I was leaving it up to the contributors to continue the discussion about the Tesla series bifilar pancake coil.  What unique purpose or purposes does it serve?  What is special about it and what can you do with it?  What practical applications are there for it that specifically require a Tesla series bifilar pancake coil?

So is it real or is it just one of millions of patents that were never used in the real world and the only reason it is discussed is because Tesla's name is on it?

The field is wide open and I hope we hear more than crickets chirping.

Seems that you really need go to bench work a bit and make some tests  , and discover by yourself about the questions that you ask , like others do .  Sitting around waiting as someone expects rain is never a good solution.

For sure you will have many things to talk after do some tests about the subject of pancake coil , otherwise like you say you only able hear crickets chirping, because other people are more concerned in working to clarify some of the points of the thread, that call's research 
Now if you assume is nothing more to explore on this thread try not be so repetitive about your questions otherwise ,you run the risk of looking a annoying person ask all time the same things .

Why you don't try play a bit with such coils ? even you spend some of your precious time is better than you become annoyed without know in first hand, some of the points that you refute  about any possible advantage of this coils .
I really don't understand such position . 

About you say the transformer discussion has pretty much hijacked the real purpose of this thread, i really don't agree with you , because we already change some posts between us about themes like  efficiency of power transfer with this type of coils with a video shot included, but you simple argue and refute saying that a normal transformer  have much advantage in this process of transfer power in relation to a transformer made by bifilar pancake coil , but now you say that a bifilar coil is not a transformer and is only indirectly related   .... this is to i laugh ? what seems to you that ? https://www.youtube.com/watch?v=aEZSCNHDYJs
Is only a coil ?

Do you think people are stupid that not understand what is a transformer and a coil  ? Or you think you are really more cleaver than others  ?
Make something  useful instead of simple create noise, because until now you not add nothing practical and positive to this thread with such behavior.
Do you think you are help anyone at moment ?  To me seems not

Have a nice day

Nelson Rocha

Quote from: evostars on May 02, 2017, 11:28:26 AM
Russ Gries his video response #2 to tinman

https://youtu.be/a86D2MPLmpE

get your calculators out!

I'm not sure the way he is measuring power in that is even useful.  He is using L1 & R1 for one power measurement and L2 & R2 for another.  The current into L1 is not the same as the current leaving L1.  The current into L2 is not the same as the current leaving L2.. Therefore his attempt to isolate the power in each coil section by way of volt-amp-phase angle seems to not be very informative.


Dave

Another interesting effect observed between a bifilar pancake coil when transfer power to a normal bifilar coil properly tuned,  is that seems the input is not affected when load is connected, where apparently the input decrease when a load is connected.
Just another simple test that could be made with this coils .

https://goo.gl/photos/BtUjDgGUQW39GU8f7

Nelson Rocha