Quotebut what was it, really, when Stubblefield made his coil - and what is it's analog
today,

Soft iron is a a general term for high iron content and low carbon. 1018 steel has been the most common for a very long time. It is high iron content and low carbon but still leaves a little remanence at least with dc current. It is easily depolarized with a magnet or ac current. 1018 is the closest one I know of that NS would have used. Most newer bolts are galvanized steel but their chemistry may not have enough iron content or too much carbon.

Ill make a deal here. If at least 4 people want one of these Ill order them then send them out. Its ten of them for about $40. Dont know the shipping. So I estimate less than ten bucks a piece. They are about 1/2" dia. and 6 inches long.  Pm me if interested.
http://sargentwelch.com/soft-iron-rod/p/IG0038157/

@all

Any of you tried the there coils with one avramenko plug , with one end of the coil to the plug and the other one touching the rod ?

I am asking because of tesla one wire circuitry , we usually assume that we nee to connect both ends of a wire to get juice ...


I have given so tough to the construction of a ns battery/motor/battery charger , i am sure a can get a easier way to make those .

I plan on using sheets of copper and aluminum or soft iron and slice them 1/4 of and inch wide and solder them the regular way to get them long enough then assemble them in individual coils of many turns thick with some cotton between them.
Them repeat the same operation many times and connect them in series .

I will use core used in some electromagnets a got around or a ignition coil core .

I will try to make four of them the rotor will be large enough to sit on top of the four NS battery , that large rotor will have 2 rows of magnets one for each end of the NS coils positioned in a cross design .


Modern equivalent is a AAA battery and one electromagnet ...

The secret in the patent was how to get power from the secondary , and no switching is mentioned , its not about unknown power source ...

It a self oscillating transformer . i can see clf lighting on those ...

Mark

OK Bill,
I am glad you have work.

I am going to pack up and go for the weekend.
This isn't working yet, and I will smile when I see my little red EER.

Darryl,
Yikes $1800. And you don't even know if it works.

N Stubblefield said something along the lines that he wanted something his farmer neighbors could use and get from the barn, or at least a common thing.
Trouble is of course... what was common then?
Tesla referred to the "common induction coil"!
common?

OK, I went to the dollar store for some crazy glue for my reed switch motor copy.
After another episode in conversation with the owner he said, try the iron works. they have everything.
So, I drove a half hour to the iron works only to see that they don't sell retail.
eesh!

But the sec'y talked with me and gave me a local iron art place that will be open next week and may have this and will sell it. (I am pretty sure that the blanks for wrought iron are what will do the trick here.)

It is NOT special iron.
In my little motor the iron was supplied by a nail.
That is why I was thinking the nail in the electrical box might be non magnetic enough or whatever.

First, I need to get the reed switch motor to work with a battery like lidmotor's from yesterday. Once it works, I am going to run through all my NS coils I already have, then, if there is not one of them that works, I will make one that has what all of them do not have. (the right stuff to make it work!  )

But, I need to plant 4 trees and 4 bushes into the ground. The weather is getting too warm to put it off any more.

Have a nice weekend everybody!

jeanna

edit add
Hi Mark,
Yes, It is basically a joule thief running off the ground.
(and, I have 5 of those running right now.)
In a way the quest for this is sort of over in my mind, except there is no need for a transistor.
I like the flexibility of knowing how to make something like this without a transistor, but I love the jtc, as you know.

Carry on. It is always adding to our knowledge. And, I like that.

Stubblefield states in the patent on the portion regarding the secondary 

The magnetic field produced by the current tranversing the coil-body induced a secondary current in the solenoid or secondary coil,  when the ordinary make and break of the primary current induced within the coil in made between the terminals of the coil.

Looking at the traditional induction coil design  I found that a spark often occured between the 2 terminals.

also in regards to cores.   Permalloy and mu-metal are not good for electromagnet cores.   Iron-nickel alloys  have insanely high permeability (permalloy)  however really low saturation points.  Infact, Permalloy is anisotropic, meaning that depending on it direction to the earths magnetic field,  it becomes magnetic.

Iron-Cobalt is the best for electromagnets
Silicon Iron is not so bad


STAY AWAY FROM  Iron-Nickel alloy CORES for ELECTROMAGNETS