Matt wroteThink about it for a moment. Electricity only moves so fast; it takes a certain amount of time to propagate down the wire (or choke). If one side has a shorter length, it always sees the reflection before the other side, so it sees the charge potential before the other side does. It also starts reflecting before the longer side does. So basically, the system is always out of balance; there is no way the longer side can catch up. If one nanosecond equates to about 11.8 inches of wire with a 100% velocity factor, it doesn't take very much time (though a lot of cycles) to create a massive charge imbalance. The charge on the short side just keeps building and building while the long side lags behind, becomes essentially more and more negative. All of this is completely engineerable by choosing the right lengths of wire so the staggering adds to the voltage change at each cycle, each reflection.
In a transmission line you have a series resonant network and an oscillator, it operates by allowing current and voltage out of phase on a balanced antenna. If you wind a choke on the feed line it will choke out current that is operating at the impedance value of that choke. In Stans network if we assume the secondary is the oscillator of a transmission line there are two major differences, firstly the transmission line current is not present so it cannot transmit and secondly there is no way the antenna or the tubes can be resonant with the frequency and it has nothing to do with it.
Firstly lets deal with the chokes. Stan uses bifilar chokes and he uses them for a reason, the reason being is that it is impossible for a choke to work on a core if they are all wound in the same direction unless they are bifilar. Consider this: The primary creates a magnetic field in the core and that field is transfered to the secondary and both the chokes, the primary is switched off and if all the other 3 coles are wound in the same direction then they will collapse their magnetic field into the circuit, Tesla discovered however if you wind them bifilar in a certain way then the collapse of that field is an opposing force and current is static almost like a dead short. The result is heat in the windings and voltage will leave the coil 90 degrees out of phase. How do I know Stan was doing this? Take a look at Stans Vic below and you will see melted tape on top of the secondary windings. This effect also works in reverse, if you heat up a pancake coil it will produce voltage. You can either have each choke bifilar or the secondary bifilar and it causes differential mode current to travel in opposing directions and collapse the magnetic field.
Stan always said that he never broke any of the laws of physics, if you create a magnetic field and induction fields in coils then you cannot destroy that energy, you can make one field oppose another field and have cancellation but the energy cannot be destroyed so it escapes as heat.
The second part I was refering to was the resonant frequency and the resonance of the circuit.
What does Stan mean by resonance? He means that when the primary is switched off the chokes are self resonant and will try to ring or vibrate at their own natural frequency and that creates an impedance network. Where ever the voltage is going to, if it see's an higher or lower impedance it becomes a bottle neck to what the coils are trying to do. So the coils are reacting to what ever is in their way in the circuit and if the reactance of the circuit is different from how the coils wish to react then they cannot be self resonant and will only resonate at what the bottle neck in the system will allow.
Because it is no longer a transmission line we do not need an antenna but we need a dummy load that has the same reactance as the coils that will except the energy or voltage at the same rate of knots.
But Tesla remarks about something else, we are no longer dealing with linear inductance in the reactance value of the coil windings, we are dealing with electrostatic inductance and reactance so a coil acts like a tube not a coiled up piece of wire anymore. Any resultant antenna or dummy load must be calculated with the width of the coil not the length of the wire inside it. This is why Tesla's longtitudinal antenna were small, they delt with the width of his coils. When you build your tubes, if you have 30 gauge wire on your coils and the coil is 75mm wide consider 4 layers on the bobbin as 1 tube that is 75mm wide and that tube is 4 layers thick or 1mm thick. Its diameter is the same diameter as it is on the bobbin.
It takes a lot of maths but it works out like thus:
3 coils of 334 meters of 30 gauge wire on each coil will result in a tube set of copper or aluminium of 6 sets of tubes with the inner 16mm and the outer 22mm both of which have a thickness of 0.9mm and a length of 95mm.
So you have 6 inner tubes 95mm long, 6 outer tubes 95mm long, inner is 16mm diameter and outer 22mm diameter and thickness 0.9mm. Wired in series like the picture below so that the capacitance is distributed evenly. If you work with stainless steel then you need to work out the difference between copper and SS and it means longer tubes. There is also a picture of how Tesla shows us how to wind bifilars.