An Attempt At A Summary: The Mark Device

[innovation_station]

Here's another point about atoms that may fit the observations of the Mark device.  Spherics discussed the NMR of Iron.  Ordinarily, nuclear magnetic resonance is associated with MHZ frequencies - however, in the weak earth's magnetic field, such resonance is well within the audio range.
see:  http://www.search.com/reference/Magnetometer

So,  Mark could have been experimenting in the audio range, he could have used the weak earth field to trigger the device by accident, and jumped to the conclusion that it was powered by earth's magnetic field (in actuality, triggered, NOT powered!).  It might have had some trouble working if turned sideways (maybe that fits some orientation observations).

Two questions:  are the pictures you show of an actual demonstrated Mark device or an attempt at a reproduction?

More importantly,  does anyone have a high resolution picture of the Mark coil that was cut into a cross section?  This might be very helpful.

i see where you want to go .. 

need a video ....  : )

i did it and posted it .. 

you refer to heterodyneing  a class A audio tube amp triggered by a SINGLE TESLA KICK ... 

ONLY THING I DID IT WITH 1 FREQ NOT 3 .. 

it feeds back and amps its self to resonant rize then hetero dynes ... 

drop the speeker put a 4 ohm coil around a damm cord and pump it !

: )

ist

here is the demo video ... 

http://www.youtube.com/watch?v=9xl0XhKuSV0

all i did was tune it ...  and flick the switch .. 
you make the kick and it amps its self till the amp kicks in then the resonant rize ..
happins then it wobbles : )