Quote from: conradelektro on January 13, 2014, 06:06:22 AM
What is "self inductance"?

It's just inductance. Old terminology perhaps.

I've read the start of the thread. Gyula did a good job of answering the questions I think.

When Tesla's patent was issued - there was no 'standard' - no 50/60Hz grid. It was all new. The generators to drive the electromagnets would have been specially made - and presumably geared to run at the resonant frequency of the coil.

I think a parallel-tank is the best way to run an AC electromagnet - because it minimises power usage when there's no load. Just like an induction heater only draws current when the metal is inserted into the coil... So Tesla's coils make a parallel tank - without needing extra capacitors. It's a clever solution...

New video about the magnetic field measurement http://www.youtube.com/watch?v=gCEqnX1JsGw&feature=youtu.be

What I can do: pulses, pulse trains

What I can not do: Terahertz diodes, spinning a rotor at radio frequency

So, the magnetic field in normal circumstances (a DC current flows through coil) seems to be identical.

Is there an other magnetic field which is not caused by a DC current?

If an AC current flows through the coil the magnetic field will have one polarity and then the opposite, but it will always be the "normal magnetic field" (just varying in intensity and direction)?

But I give everything the benefit of doubt, but please specify what has to be done to cause the magic? It must be clear and possible!

To certain people: Stop the insults, they do not produce magic in a bifilar coil.

Greetings, Conrad

Quote from: Magluvin on January 12, 2014, 10:16:55 PM
Was thinking of the Leedskalnin magnet holder.  If we have a U core with a bar core to close the end, a normal coil will produce a certain amount of field in the core to hold the bar core to the U core.  So if the bifi produces a higher initial field, the cores should lock in more than the normal coil. To find out, there would have to be a very specific and exact way of repeatedly being able to break the bar from the U, to measure the amount of output a pickup coil produces, or use weight to break the magnetic bond. Then there should be a difference in how much weight it takes to break the bond.

Mags

The bond break generates a pulse. RWG demonstrated his Leedskalnin PMH conserving then releasing the
 "lock pulse" after two years.  The precise measurement of the return power and comparison to original "Lock pulse" input would be very interesting to explore.

Quote from: conradelektro on January 13, 2014, 10:40:11 AM
New video about the magnetic field measurement http://www.youtube.com/watch?v=gCEqnX1JsGw&feature=youtu.be

What I can do: pulses, pulse trains

What I can not do: Terahertz diodes, spinning a rotor at radio frequency

So, the magnetic field in normal circumstances (a DC current flows through coil) seems to be identical.

Is there an other magnetic field which is not caused by a DC current?

If an AC current flows through the coil the magnetic field will have one polarity and then the opposite, but it will always be the "normal magnetic field" (just varying in intensity and direction)?

But I give everything the benefit of doubt, but please specify what has to be done to cause the magic? It must be clear and possible!

To certain people: Stop the insults, they do not produce magic in a bifilar coil.

Greetings, Conrad

Look Conrad, I am an experimenter like you. I need a theory to help explain observed effects. One of those effects is the spontaneous charge in the magnet core bifilar LC tank while standing still. I used the hypothetical "Bloch wall teraherz frequency" theory  as a stepping stone towards better understanding of an overunity effect. The series bifilar has power transfer characteristics that make it a better choice in my view for the kind of power recovery I get from the "Synchro coil". I really can't be sure why it works the way it does. What I do know is that you spent time fashioning a fine prototype to test, and no one is insulting your expert technical skill and craftsmanship. I truly hope we can return to that experiment, fashion a resonant bifilar LC tank with an electrolytic capacitor, perhaps with a pico-farad cap in tandem to, fine tune the bifilar's self capacitance with the tank capacitor, and continue on with the positioning portion of the experiment which started out to be pretty exciting. We're trying to "Pump the core magnets". 

Hi Conrad,
  I think Tesla found that the 'magic' of the bifilar pancake coil was it's ability as an antenna...

The fact that the coil is both the inductor and capacitor in the tank means that the electrostatic component isn't hidden inside a capacitor shell - so the antenna is both electromagnetic and electrostatic. (Not sure if you're aware, but there are such things as capacitive/es antennas...)

I think he found that you can drive them as purely capacitive / electrostatic - using very high voltage. And perhaps that's how he got the superluminal longitudinal waves... Assuming that he did...

I hear they also have high directivity. Also they can be manufactured and paired quite easily - simply by using the same length of wire...