Tesla's Bifilar Pancake Coils

[Mike2kt]

This is a 12 stand #36 Litz wire wound pancake coil I made today. It is 245 turn and is 12 inches round. I will test it first by submerging it in dialectic oil. If it tests well then maybe pot it in wax. I have made Tesla coils with Litz wire and have had amazing results using it. I'll update along the build.

Major Major Major Props! Nice winding!

[woopy]

whaouu Jiffycoil

can't wait for your results

is it bifilar or mono filar litz ?

Good luck at all

Laurent

[Jiffycoil]

Thanks Woopy,
The Litz wire is a single wire that is made from 12 strands of insulated #36 magnet wire.

[U4R1A]

It should be interesting.. I have the 2.5 gallons of Mineral oil to submerge it and I'm staining the wood disc for the primary.

[Jiffycoil]

Ah, I knew the day would come when my lone Lab rat after repeated exposer to hours of all sorts of strange energies would start to speak. Energeticforum meet U4R1A he is a super smart, super cool guy and we have been working together on many projects and this large Litz coil was his brain child. We are going to set it up in a Tesla coil configuration yet there will be a few changes that will make this coil one of a kind. I believe this will be one of the first large Litz wound pancake coils ever shown on the internet. I'm sure someone way have made one in the past it's just they have never spoke of it on the internet. It will be interesting to see what it produces.

[U4R1A]

Excellent introduction Jiffy. I've been on a few other forums in which no one builds any thing and rarely responds to new ideas. Jiffy recommend me to this one so I hope to contribute to some new ideas and interesting builds.

[crackahcrackah]

Ah, I knew the day would come when my lone Lab rat after repeated exposer to hours of all sorts of strange energies would start to speak. Energeticforum meet U4R1A he is a super smart, super cool guy and we have been working together on many projects and this large Litz coil was his brain child. We are going to set it up in a Tesla coil configuration yet there will be a few changes that will make this coil one of a kind. I believe this will be one of the first large Litz wound pancake coils ever shown on the internet. I'm sure someone way have made one in the past it's just they have never spoke of it on the internet. It will be interesting to see what it produces.

I've got one. I used wax to seal it, but I didn't have a pressure cooker to apply a vacuum and then apply pressure as tesla recommends. Karl Palsness has one and put a video up on youtube a year or so ago with it. Unfortunately the effects are not on camera and can't be seen well in normal daylight conditions.

Did you wind this like fig.1 in tesla's magneto-coil patent, or like fig.2 ? Mine was wound like fig.1.

[Jiffycoil]

Im not duplicating Tesla's patent I'm building a Litz wire pancake coil. Can you put up a picture of your coil I would love to see it. What Litz wire did you use? I have built many Pancake coils and all of the results have been clearly visible. Please site where Tesla recommends the coils to have a vacuum applied.


Pancake coil 2 by jiffycoil, on Flickr

[Mike2kt]

Im not duplicating Tesla's patent I'm building a Litz wire pancake coil. Can you put up a picture of your coil I would love to see it. What Litz wire did you use? I have built many Pancake coils and all of the results have been clearly visible. Please site where Tesla recommends the coils to have a vacuum applied.

Hey Jiffycoil,

Can you share with me where (or what company) you purchased the Litz wire type 1? Or did you have to order the wire direct from the manufacture/distributor?

All I've been able to find is a few subdivided rolls on eBay.

-Mike2kt

[Jiffycoil]

U4R1A picked that up and he'll need to give the vendor info. It was a 12 36 litz wire. So it has 12 strands of #36 insulated magnet wire with a silk like housing around it.

[Mike2kt]

U4R1A picked that up and he'll need to give the vendor info. It was a 12 36 Litz wire. So it has 12 strands of #36 insulated magnet wire with a silk like housing around it.

Just to clarify, are you running the 12*36awg wire as a "typical" or "bifilar" coil (i.e. two wire sets)?

Or if you only ran one cable for a bifilar coil, are you planting to separate out the ends into two sets of 6 strands so you can have a bifilar coil?


Thank you again for all the info!!!

-Mike2kt

[U4R1A]

Surplus Sales of Nebraska <-- This is where I got it.

@Mike2kt - We are running it like a typical pancake. With the Primary also as a typical pancake rather then the side helical design you normally see.

[Mike2kt]

Surplus Sales of Nebraska <-- This is where I got it.

Thank you, Thank you, Thank you!!

[crackahcrackah]

Im not duplicating Tesla's patent I'm building a Litz wire pancake coil.

Whoops! I misspoke. I have a pancake coil made from 36 or 38 awg magneto wire. I used 4awg for a 1 turn primary. Sorry about that. Sleep deprivation speaking there.

I have built many Pancake coils and all of the results have been clearly visible. Please site where Tesla recommends the coils to have a vacuum applied.

He mentions this in a few places.

1891 lecture:
http://www.transformacomm.com/en/tec...20-lecture.pdf

Search for the text, "As to the manner of insulating the coil, it will be found convenient to proceed in the
following way", to read about it.

Then there's the 1897 patent he has (#577,671) which is for the manufacture of improved performance capacitors and coils.

Lines 20 - 56
"It has heretofore been shown by me that the efficiency and practicability of such devices are very greatly enhanced by the exclusion of air or gas from the dielectric separating the conductor; and the object of my present improvement is to secure such exclusion of air in as perfect a manner as possible in a convenient and practicable way. To this end I place the condenser or other device (coil) to be treated in a receptacle from which the air may be more or less perfectly exhausted, and while in vacuum I introduce an insulating substance, which liquefies when subjected to heat, such as paraffin, which surrounds the said device and finds its way into its interstices."

2nd page of the same patent
Lines 15-19
"I have found that condensers, transformers, and similar apparatus treated by this process are of very superior quality and especially suited for circuits which convey currents of high frequency and potential."


Oil will work, but you need to look at what he recommends doing to get every last little bit of gas out of the oil. Moving an oil filled coil around is a pain from what he says. His lectures on this issue from 91-93 indicate this and I think his patent in 97 just shows that he decided something like parafin was easier to work with.

[U4R1A]

The overall reason to go oil over wax would be the fact that any alteration that needed to be done to the coil would be semi impossible with wax. Plus with wax once you have a carbon track in it your coil is pretty much done. Also oil is cheap and reuseable.