I'm following an 'inspiration' thought.
That, blisteringly fast nanosecond secondary pulsing of a coil can bring forth sizable outputs, scaling technologies for practical use..
Regarding the use of a coreless coil - Tesla reported that "The aether becomes the core, but due to its very fine properties, higher frequencies must be used, as the remnant magnetism of the previous pulse decays much faster than in an iron based core"
Also - "What Tesla is saying is that for optimal results, the frequency with which pulses are delivered into the input circuit and main coil, should be correlated with the time taken for each pulse to travel the length of the coil (period of the coil). However, in determining the period of the circuit, such factors as the volume of the capacitor and resistance of the coil must also be taken into consideration."
An aside but also mentioned "the apparatus Tesla was producing in 1897, was markedly different from the apparatus he was producing in 1892. The later apparatus was in fact DC based over-unity coil pulse apparatus"
(Source -
http://peswiki.com/index.php/Article:Tesla_DC_Thermoelectric_Coils *NOTE mbrownn advises a virus risk with this link* )
The device that Sterling Allan has been viewing in South Africa has the statement within his trip report of "The switch between the master take a few nanoseconds."
(Source -
http://www.overunityresearch.com/index.php?topic=1305.25 )
I wish to explore methods of switching a coil faster than the current can catch up.
It's not the initial pulse to a coil that matters, so much as the secondary push back before the field completely collapses.
How to achieve it ?
Mechanical is one way, physical contacts separated by tiny 'dead spots' on a wheel and spaced to bring a much larger initial pulse, than the second pulse.
The Wiki article on the nanosecond states: "100 nanoseconds – cycle time for frequency 10 MHz, radio wavelength 30 m (shortwave)"
10MHz capable power transistors would seem obvious...so let's have a look at a few popular and available ones:.
MJE3055 - 2 MHz
MJL13007 - 4 MHz
MJL21194 - 4 MHz
TIP42C (PNP) - 3 MHz
So, MOSFET's then ?
IRF630 - Turn on, Rise, Turn off, Fall times = 170ns
IRF720 - 67ns <---------------------------------------------------------- AHA !

Perhaps MOSFETs are the key for this.
We need to saturate the core (if one is used), saturate the windings and then blast a second pulse before that energy fully collapses.
Thus, the timing is in the switcher, mechanical mechanism or both an electrical component and a mechanical solution.
Solid state would be the preference...perhaps the Steven Mark TPU comes along at such a point.
Are there common chips, perhaps found within cellphones or other GHz applications capable of being timed to such speeds, that would fire the MOSFETs ?
Is it likely to need a PIC type solution ?
I'd really like to know what you think
