Stubblefield coils (bifilar) and speculations

[resonanceman]

So, having one cu next to one fe is the bifilar part.

Jeanna 



UUUmmm
Not  exactly
As I understand it   bifilar means that  2 wires  are wound together  thoughout the coil 
Most  bifilar  coils  are copper / copper

gary

edit 

you  could call our coils  bimetal  bifilar coils

[Localjoe]

Cheers mates

[Pirate88179]

@ Gary:

I didn't take it that way, don't worry about it.  Your post made a lot of sense to me.


@ Gary and Jeanna:

"Below quoted from wikipedia:

Bifilar coil
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Nikola Tesla's flat bifilar coil.
Nikola Tesla's flat bifilar coil.

A bifilar coil is an electromagnetic coil that contains two closely spaced, parallel windings. In engineering, the word bifilar describes wire which is made of two filaments or strands. It is commonly used to denote special types of winding wire for transformers. Wire can be purchased in bifilar form, usually as different colored enamelled wire bonded together. For three strands, the term trifilar coil is used.
Contents
[hide]

    * 1 Description and applications
    * 2 History
    * 3 See also
    * 4 References
    * 5 External links
    * 6 Patents

[edit] Description and applications
Four types of bifilar-wound coils

   1. parallel-wound, series connected
   2. parallel-wound, parallel connected
   3. counter-wound caduceus coil (series)
   4. counter-wound caduceus coil (parallel)

Some bifilars have adjacent coils in which the convolutions are arranged so that the potential difference is magnified (i.e., the current flows in same parallel direction). The magnetic field created by one winding is multiplied with that created by the other, resulting in a greater net magnetic field. Others are wound so that the current flows in opposite directions. The magnetic field created by one winding is therefore equal and opposite to that created by the other, resulting in a net magnetic field of zero (i.e., neutralizing any negative effects in the coil). In electrical terms, this means that the self-inductance of the coil is zero.

The bifilar coil (more often called the bifilar winding) is used in modern electrical engineering as a means of constructing wire-wound resistors with negligible parasitic self-inductance."

My understanding relates back to what Hans had said.  He said something like (when referring to the patent photos) that these coils are wound in a bifilar fashion.  I took that to mean that the two wires, different metals though they may be, are wound in a bifilar manner (parallel) around the core.

Bill

[Pirate88179]

Quote from Gary:

"you could call our coils  bimetal  bifilar coils"

Yes, I agree...excellent term.  I think that is essentially what Hans had been saying but this terminology sums it up nicely.

Bill

[argona369]

Hi peaple,

You might find these threads interesting,

http://www.overunity.com/index.php?topic=4623.0

http://www.overunity.com/index.php?topic=4599.0

Cliff,