Originally posted by NickZ
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I was thinking even a frame covered with copper foil should do the job - Copper Sheet, Copper Flashing, Copper Sheets, Copper Foil Rolls, Copper Sheeting for Arts and Crafts and Various Applications.
I had to finance a few other things and this is still on my purchase list
I ran some test with my coil (which is not built as described as far as dimensions but following geometry). There are energy fields, quite strong inside - around the cones crossing area. Bases/apexes are also active. When one hand is held near and other extended in the air (like an antenna) the sensation in the hand close to the coil can get prickling enough to make you move away. Almost like a sudden jolt from JT (not that powerful, but unexpected). I'll try to make 3' tetrahedron either today or tomorrow. I don't think I have enough wire to make large cones to fit description.
There may be specific freq. required to ring it, not just a random, such as 60Hz. My tests with cones showed that they resonate in 500 -700kHz range. I was getting response much higher in amplitude than my function generator is capable of supplying and two cones connected with apexes or bases created nice oscillating tank to power LED from cement cell. BTW this cell is almost 2mths old and dry. I was pulling 5mA for couple hours before it started to drop by 0.5mA.
There is an answer in cone shape, water, vortex. We need to combine what we know or search for more clues.
Vtech
. Looks like the cone apex have more influence. can you feel anything with the base side, Vtech? 

Let say you start winding from the base (not practical but to simplify explanation) and continue CW toward the apex. Now you move wire (bend) from the apex toward circumference and continue winding down, toward base keeping CW direction (motion of your hand). This is your first coil set. Second is done the same way (starting from the base and winding up) but you go CCW. Now you have two sets which be positioned close to each other. At least this is the way I understand.


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