Lords of the Ring

[innovation_station]

@ dan i have them here they are but what is the coating on your wire? 1 thing i notiecd when i was playing with steel wire was when i sent power through it there was actualy 2 diffrent kinds of spark the blue spark looks like a normal spark and an orange more spattery spark long sparks i see both kinds when playing only with welding wire what is the diffrence between the 2 kinds of spark?

@ turbo i have a gift for you an invention if for some reason you do not want it will you work with me on it as your experience will progress this project

the answers to the future reside in the secreats from the past

is

[Dansway]

Ok....  Folks   HERE IT IS....

THE TPU work like a LASER.

Enjoy!

~Dan

[turbo]

 

[giantkiller]

This simulation allows us to play with the Helmholtz coils/top & bottom collectors.
http://jlearn.mit.edu/simulations/teachspin.jnlp

One can use this physic lab simulator to check possible scenarios for magnetic field generation.
The idea I have played with is imagining 2 metal detectors facing one another. The top one is on and the bottom accepts the signal.
And the magnet in the simulation here is the middle collector with a DC field or the top and middle are fired in sync. And we bounce that up and down with the top coil. Not only does the bottom coil pick the signal but also the bouncing field from the middle coil. We do not involve rotation yet.

Did anybody say aluminum?
Now let's put 2 aluminum plates on the top and bottom of this puppy.

The TPU is almost exactly like Spark Sweet's VTA.
2 rectangular magnets facing each other with 2 bifilar wound coils exciter/ pickup coils placed within an aluminium rectagular wave guide. Hello?
Each rectangular wave guide(TPU) will have it's own resonant freqency according to it's cavity dimension. Does Heathkit make microwave oven BIY kits?

Where is T. Bearden when you need him?

And here's today's clue: Shrapnel stops only once.

Post from Dansway:
I was always told that microwave ovens send out magnetic waves as well as microwaves. Things capable of soaking up a magnetic field (iron) will do so, and it induces a current. If the metal object in the microwave is uniform and well-connected, like a spoon, it will just heat up. If the object has lots of spaces and is poorly connected to dissipate charge, differences in charge will build up and the item will spark (steel wool).

Put a spoon in the microwave and see what happens. Put steel wool in the microwave and see what happens. Better yet, put steel wool in a mixture of sugar and drano; that's the most fun thing ever! I ruined a microwave diong that because the fire got out of control and it coated the microwave with carbon. It couldn't even heat up a glass of water after that.

Microwaves consist of a stream of photons, just like light or X-rays, but with a very much lower frequency of oscillation. All these are collectively described as electromagnetic radiation, and also include radio waves which are at even lower frequencies. This is because there is both an oscillating magnetic field and an oscillating electric field present. The propagating EM wave can be described mathematically by the Poynting Vector (look up Poynting Vector in Wikipedia, also vector cross product, Maxwell?s Equations, vector algebra)

If you have only year 10 Math and no knowledge of calculus, vectors, complex numbers or matrices, then the mathematical symbols and concepts used are going to present you with some problems.
I can aim you in the right direction if you post again with any questions.

Poynting Vector = the vector cross product of the electric field and the magnetic field. or in symbols :- S = E X B
The X symbol isnt a multiply sign, but the cross product operator symbol.

To put it is to plain English the Poynting vector points in the direction the EM radiation is going, and the electric and magnetic fields oscillate in phase with each other at right angles to this as well as at right angles to each other. The displacement current, and the magnetic field it produces, act like a mirror to the microwaves and reflect them - reflection of light or radio waves works the same way. It is impossible to have a propagating electric field without the accompanying magnetic field, and vice versa. The two are opposite sides of the same coin, like love and hate.

When an EM wave passes within a few wavelengths of a conducting surface it induces a Displacement Current in the metal close to the surface. The current density decreases with depth exponentially - this is known as the skin effect. The phase relationship of the current with respect to the EM wave also varies with depth and the current will be going in different directions at different depths.
The skin depth is the depth at which the current density is 1/e of that at the surface. Skin depth for copper is as follows
60Hz - 8.57mm
10kHz - 0.66 mm
1MHz - 66 micron
1GHz - 2.1 micron
Depth is proportional to the reciprocal of frequency squared

Skin depth for non-magnetic metals is only dependant on conductivity, shallower for better conductors. If the metal is ferromagnetic, then the skin depth is reduced significantly on account of the magnetic properties. Iron although it is a worse conductor than copper by a factor of 5 has a skin depth about 1/6 that copper because of this. Cobalt and Nickel will be similar.

Look up Skin Depth in Wikipedia - there is a full mathematical explanation and some graphs.

Very little displacement current flows deeper than a few skin depths. Waveguides that act as "pipes" for microwaves are often silver plated in order to reduce the resistance that the displacement currents see. The plating only needs to be a few microns thick to reduce the transmission losses by a worthwhile amount. Microwave heating of metal surfaces - eg the metalwork in a microwave oven - is minimal if the metal is thicker than a few skin depths, but if the metal is very thin - eg in the CDs mentioned in my post above - then the same total displacement current must flow, and so the current density higher. In the case of the CDs the aluminum coating is maybe only 10nm thick at best and therefore only ~1/100th the skin depth. The current density will be 100 times higher than if the metal were even only a few microns thick, and the joule heating quickly melts the metal and once the continuous original sheet is fractured by contraction due to surface tension moving the molten metal, the high voltages cause arcing and incandescence. The reason the wirewool mentioned in the above quote bursts into flame is because high voltages are produced between steel filaments that aren?t quite touching and arcing occurs. Also if there are only small points of contact the high currents flowing there cause considerable heating. Similar sparking occurs if you put an aluminum foil plate in the microwave with a stainless steel spoon on it, but any single solid piece of metal doesn?t.

--giantkiller. Aye, aye Captain. Waveguide in place!

[Motorcoach1]

@ GK I'm useing Femm 0.4 and Quickfeild student release , I think the Quickfeild will work for you the Femm is only 2 dimentional