Hubbard coil

[forest]

The most important for me was article where Hubbard said something about Hendershot device. He had stated that Hendershot copied his own device.

[quarktoo]

It is difficult.

Iron does not rust very much. It can be found as fence posts installed between
the wars, and is not made much these days. Lab suppliers can deliver at fabulous
cost. Sometimes used in rod form for welding.

If you came across a big enough supply, you could make a rig based on a coil
magnetising a sample in the form of a core. Iron sheds its magnetism quickly
whereas steel does not (which is a crucial property, of course).

How about black sand and some epoxy resin?

Dragging a magnet around in about any soil will yield black sand. Place that in a thrift shop blender to break it down (it shatters nicely) then use a magnet to get the good stuff. Mix it into an epoxy paste and align it with a magnet while it cures. I think at that point you have what amounts to a ferrite rod.

That statement made about how iron does not "hold its magnetisim" is correct. It is the permanency property of an inductor. Ever notice that the laminates of a core also do not have much permanency? It has more to do with how the steel is made than what it is composed of. It is all made from IRON but the grain is prevented from growing in electrical steel.

Amidon makes ferrite rods and could give you something that best mimics Iron.

https://www.amidoncorp.com/categories/6

[ramset]

I still can't believe your here??
Like a reincarnation on steroids!!

Sad about the Birds and the fish,couldn't they have started with Cockroaches and Liberals?[Liberals = a state of mind not ethnicity]

Anyhow I have to go out to the store now and get more "Depends".

Chet

[ramset]

SOooooo.....
Elite guys always build stuff!!
Watcha gonna build??

A responce to the Barbat patent thread at poynts place,
user "itworks" [first and only post thus far]

Quote.
Chet, the name is Joseph Larmor. Larmor, J. 1897. "On the Theory of Magnetic Influence of Spectra; and on the Radiation From Moving Ions." Phil. Mag 63:503-512.
Larmor showed that photon energy is radiated from a moving charge in proportion to the square of the charge's acceleration. Thus, a charge of lower mass, e.g. a low-mass electron, accelerates more quickly than one of "normal" mass, and therefore radiates proportionally more energy for the same inductive force.
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[Paul-R]

Tubes used today by plumbers are steel or iron ?

Steel; actually more likely to be plastic or copper.

There is a firm selling piling material for making
building foundations but they can't be bothered
to answer my emails.