if we are going to explore stubblefield wound coils i would suggest watching the way you coil your iron, for instance, when you wind a single nail if you stick it strait down what is the lower lead wire negative or positive? and what is the top?Ã,  if you do a dual wound be careful of how the windings face, for instance your winding clockwise down one nail and winding counter clock wise up the next? what about 2 nails parallel but one after the other, both wound clock wise from top to bottom then clockwise top to bottom?Ã,  the windings may alter the behavior! after all we are dealing with a planet and magnetic current a subtle difference could mean the world like say..... north and south alignment?
and consider the material of the core verses material of the windings.

and to answer the questions about iron, (i used to play with blacksmithing) i think you will find that iron is just iron, steel is iron and carbon mix, pig iron is high carbon mix (strait from smelting the iron ore usually) and tool steel is the highest carbon where they have to specially manufacture it to hold the carbon.  steel only wants to naturally hold so much carbon and thats pig iron, unaturally high carbon is tool steel, and they have to cool the steel soo fast it cant loose the carbon, just like a drink it holds more carbon hot, and when it cools it "sweats" the excess out. giving pig iron a natural black finish that doesnt corrode or rust.

my 2 cents.

check back later.

@all

if you want to build something really interesting to bury in the back yard and confuse the neighbors, then check out these mammoth earth constructs that Louis Rota was building back in the 1930s:

http://www.wikirota.org/en/Earth_Antenna

and here's construction pic of one of the many triplets in a Rota block:

something wierd but i think might be useful.  this seems to be a similiar side effect we are getting. i cant explain it but something is just bugging me about this and i had to post.

http://youtube.com/watch?v=G4Mr_0S7zqw&feature=related

G'day all,

Have a look at the drawing below. Should be easy to replicate. Instead of the copper rod shown (which is difficult and expensive to get) I suggest using a length of copper pipe as used in plumbing.



Source: http://www.icehouse.net/john34/groundradio.html

Hans von Lieven

EDIT: Whist following up on ground wave radio, which is along the lines we are researching, I found this:

http://www.borderlands.com/newstuff/research/ground-myst.htm  Fascinating read.

well we know iron likes magnetic current, if that is whats happening here. perhaps if we spun a copper coil plain in the air we could find out if the magnetic current is whats to play? this could be done by air alone. a good breeze and the coil in the right orientation and it would spin maybe get some volts? i noticed a couple volt spikes from the tesla coil but i couldnt replicate it. waiving it in the air didnt do any good and the little rotation i did didnt do much.

i wonder if we use hanz information about the iron pipe and the copper pipe inside, what if we add a nail with a coil around it? hmm.... id try it if i had copper.