Tesla's "COIL FOR ELECTRO-MAGNETS".

[Farmhand]

In the theoretical case I refer to above the distributed capacitance of the bifilar coil is equal to the added capacitor capacitance and the distributed capacitance of the monofilar coil (in theory). So a bifilar coil with a distributed capacitance of 220 nF and a monofilar coil with whatever capacitance is needed added to it to get it to the same 220 nF. Probably need a lot of wire.

If someone wants to test it and that amount of distributed capacitance is not possible then the values could simply be changed to what is possible. Thing is both coils would have the same capacitance and inductance one has an external capacitor and one doesn't.

.

On a side note it is surprising how many different configurations this transformer with the 16 windings on it can be configured. I can make four bifilar coils and connect them in different ways to get different measurements. Interesting...

..

[Magluvin]

In the theoretical case I refer to above the distributed capacitance of the bifilar coil is equal to the added capacitor capacitance and the distributed capacitance of the monofilar coil (in theory). So a bifilar coil with a distributed capacitance of 220 nF and a monofilar coil with whatever capacitance is needed added to it to get it to the same 220 nF. Probably need a lot of wire.

If someone wants to test it and that amount of distributed capacitance is not possible then the values could simply be changed to what is possible. Thing is both coils would have the same capacitance and inductance one has an external capacitor and one doesn't.

.

On a side note it is surprising how many different configurations this transformer with the 16 windings on it can be configured. I can make four bifilar coils and connect them in different ways to get different measurements. Interesting...

..

For the sake of it, each wire loop in a bifi that is between the lead out first and last loops are little caps in series. lol it would be interesting to see if a bifi resonates at the regular coil freq because of it. Its got to be a bit different than where a normal coil, the plates of the cap are shunted somewhat by each turn, but the bifi are only shunted by half of the whole coil. Much easier for the bifi capacitance to have a high voltage. And maybe even if it can ring at normal coil freq also.


Weve got to try all kinds of ways to test. The amount of voltage difference working in these 2 different coil has to make a big difference in some way. I have some ideas that I want to try. Like dumping fields collapse current from another coil into the bifi capacitor. Where a normal coil would impede the spike, the bifi should take it in.  Might be a way of making good use of collapse spikes. Especially if those spikes are timed to res freq. I also really want to try the multi core inductor experiments. Ive got some time starting tomorrow to fiddle.

Mags

[Magluvin]

On a side note it is surprising how many different configurations this transformer with the 16 windings on it can be configured. I can make four bifilar coils and connect them in different ways to get different measurements. Interesting...

..

I have seen where there are 8 individual enameled wires twisted together as a single conductor used in switching supply windings. Take half(4) to make 1 winding and the other 4 for the other winding. Its like using 2 larger wires to make a bifi, but more capacitance. If we want more inductance and less resistance, use a core and less wire. So multistrand windings can help increase capacitance if we use less wire/turns by adding a core, and decrease resistance.

An alternative to multistrand to increase capacitance would be flat wire.

http://www.ebay.com/itm/REA-tinned-copper-flat-buss-wire-003-x-026-2-Lbs/261297961523?_trksid=p2050601.m2372&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D207%26meid%3D4172994119461631007%26pid%3D100085%26prg%3D1112%26rk%3D1%26rkt%3D4%26sd%3D261297961523%26%26clkid%3D4172999009395071920&_qi=RTM1562569

Just an example of many things out there.

Mags

[MileHigh]

Gyula:

The interesting thing is that such bifilar coils (connected as series bifilar like it is now) do have multiple resonances as the frequency increases, what is more: parallel and series resonances should alternate each other as you sweep the frequency due to the distributed nature of the self capacitance and inductance.

Thank you for that information, that's probably the most important posting around here in a while.  I suppose that could be simulated with some kind of lumped transmission line or something like that.  Your link looks like the real thing.  Ham radio guys are the real thing.

To add to that, when you pump some sort of signal into that complex filter, it's the way the individual frequency components in the signal react with the complex filter.   There are alternating poles and zeroes (peaks and nulls in the frequency response.)  The resultant response is addition of all the responses to the separate frequencies.  It's like a frequency "shake and bake" process that takes place.  I still think of a real physical spring in self-resonance.  There is a certain randomness and strangeness to the physical spring in self resonance because if you think about it there are actually two or more springs springs in one.  There is the spring that stretches along the axis, and the spring associated with the bending of the shaft of the spring.  The shaft can bend along two orthoganal axes, so that's like two springs.  The important point is that an ideal spring is massless, and the mass of the metal of the spring is modeled as a distributed capacitance.  It's a very good analogy for what we are talking about.

Also, I saw something once when I was a kid that was so cool.  It was a big disk that stood upright.  There was a big tuning dial on it.  You put it next to your AM radio and you could pull in far away stations and make them sound clear.  You moved the big dial to find the tuning spot.  Even as a kid I thought it must be some kind of tunable resonator, and now as an old kid I agree.  I should try looking it up online.  A passive LC resonator that resonates on the AM band.

MileHigh

[synchro1]

Here's a report of an experiment by contributor Neptune off the Muller Dynamo thread:

neptune:

I did a small experiment today involving bifilar windings . Someone else posted a link to a website about this . I made 3 electromagnets using 3 similar iron cores . Each magnet used the same length of wire . One was wound normally , one bifilar and one quadfilar .The same power supply was used to test each electromagnet in turn . The strength of each was tested by seeing how many small nails it would lift . The results were as follows :

Normall wind - 4nails .
Bifilar wound - 12 nails .
Quadfilar - 12 nails .

Note that each electromagnet had the same core and the same Amp-turns. I was surprised that the quadfilar was no better than bifilar . This experiment seems ridiculous , but you MUST do it yourself . The implication is that by using a bifilar motor coil , you could create the same input torque for a much lower electrical input , maybe as low as one third . Got to be worth a try? But do the simple experiment first.

Here's a hyper-link to the page: It's at the bottom!

http://www.overunity.com/3842/muller-dynamo/3935/wap2/

Additional comment from Neptune:

mikestocks2006:

--- Quote from: neptune on July 01, 2011, 07:06:21 PM ---@ Nulpoints , and also in reply to Pm from Mikestocks 2006 ,  
Bifilar in my case is as follows . Take 2 wires , A and B . Wind them "2in hand2 side by side . do not twist the wires together , and try to avoid crossed turns . All 3 electromagnets are wound single layer . Connect the start of wire a to the power supply . Connect the END of wire A to the START of wire B. Connect the connect the END of wire B to the power supply . So current flows from start of A to the end of A which is then connected to the start of B . The source makes no mention of the shape factor of the coil , but shows a similar arrangement to above . The nails I used were three-quarter inch upholstery tacks (tin tacks).

Neptune is very clear about nature of the Tesla series bifilar connection he used in the test!