@ Joe:

Yes, thanks, I found the post you mentioned.  You said 2 of the wires from the bifilar coil have to be shorted, which I guess means joined?  But which two? One from the copper and one from the iron? Or, iron wire to iron wire?  Maybe we won't know any of this until we build such devices and try all variations.  He said he used an iron carriage bolt for the core.  Must be a pretty large bolt for the size of the coils I  have seen in the pictures.

@ Artic Knight:

Those insulators, if indeed they were ceramic would have been porcelain.  You could find a lot of things to "simulate" that arrangement.  A coffee mug for example or flower vase perhaps?  Just check with the meter to make sure there is no continuity.  (Some imported China products use some weird additives that might decrease the insulation value)  For these lower voltages, I believe that any insulating material might do.  Just find one that suits your configuration.  Stubblefield used iron cores on his windings and this is probably important.  What the composition of the iron in those days was is any body's guess.  My little experiment with all of the various metals was just to see if I could up the mA, which I did.  As it turns out, probably at a cost to the materials involved.  I am going to change gears towards coil research now. I think your experiments show this is the right direction also, this is what Stubblefield did. You got 2 mA? That is a good number in this world of ours.  Some don't get any, and I think I started with point something mA.  My high record is better than I have ever received prior but, it appears galvanic action may have destroyed my experiment. Still 0 mA today.

Any one have any idea of the wire gauge Stubblefield might have used?

@ Joe:

Do you think it is time to shift to the "induction coil" arrangement that Stubblefield's patent described?  This would be interesting in that, induction should only work with a "pulsed" power source, right?

Bill

@bill

I still think the series couple that was posted a few pages back is worthy of more investigation.  As well as building an induction coil like stubblefeild's but with just the primary windings to start.. I wish i could be out there so whats your opinion.
                                                                                                                Joe

Did I already say I want to add that induction coil direction to my experiments? I do.

I also just found an efficient way to review posts. I hit the print button under the reply button and the whole thread showed up on a new browser page. It is much easier to scrool down many pages back.

cool, thanks Stephan

jeanna
co-op today catch you later

Don't know if this has been addressed yet, but I've had good results from using a galvanized bolt (12'') with masking tape as insulator and wrapping bare copper wire #14 gauge around it. I got 0.9 VDC. This will eliminate the need to find north/south. Also, having the two dissimilar metals tightly wound in close proximity creates voltage (@ .5V) even without being in the ground.


BTW here's a link on earth batteries

http://www.icehouse.net/john34/earthbatt.html