@ Joe,

I am not certain I completely understand exactly what you did, but here is my take on it.

Iron wire, in the absence of any galvanic action will show signs of decomposition (Rust etc) after a very short time of immersion in water. If the copper wire has a plastic covering there should not be ANY galvanic action. Just take a short piece of iron wire on its own (the same stuff, if you can) and put it in a jar with the same type of water you used in your experiment and have a look. Let me know what pans out, I am interested.


@ Bill,

I agree, only trial and error will get us somewhere on this, there are just no data to check out.


Hans von Lieven

Quote from: hansvonlieven on February 07, 2008, 04:58:18 PM
A true bifilar coil a la Tesla has two wires parallel, connected in such a way as to have opposing current flow through the wire. Stubblefield's coil is conventionally wound with two wires of different metals instead of one.It is NOT what Tesla would have called a true bifilar coil. This is a very unusual arrangement on which no real data can be found.

I think that Stubblefield tried initially to build a galvanic element of some strength with minimum volume. He then found that a coil wound in such a way displayed unusual properties that no other coil had.

There is something of interest to discover here of that I am convinced.
That's for sure!

Hans von Lieven

First, Thank you for your well considered reply.

I assume that my first experience with bifilar winds which was the joule thief is what gives current going both ways at once. If either of the iron copper pairs is twisted together the result could be this (if the twisted pair is at either end of the circuit) , although NS only described these terminals being connected on either side of a load and not together and one pair specifically left open and unconnected [p2, LL 17-26] , so I am not sure if he saw the joule thief in his plan.

The galvanic thing is remarkable in how little should be expected from galvanic action between iron and copper. It is one of the first things I learned with this earth battery. Iron and copper are at the same end of the galvanic spectrum and even at that very close to each other. He had to know to expect very little.

So, please explain what you mean by "some strength but minimal volume". The voltage across these 2 metals that I expect is only 14 millivolts. Is that what you mean by volume?

BTW, what would Tesla have considered bifilar, the joule thief?

Thank you

jeanna

@ Jeanna,

I apologise for not putting it more succinctly, what I meant was minimum device volume for enough energy production for his purposes.

Is that any clearer?

Hans

Quote from: hansvonlieven on February 07, 2008, 07:20:36 PM
@ Jeanna,

I apologise for not putting it more succinctly, what I meant was minimum device volume for enough energy production for his purposes.

Is that any clearer?

Hans

I'm afraid not. Unless you mean physical size?
jeanna

yes, maximum galvanic action in the smallest physical size possible.

Hans