Just acquired my first 1944 looped R nickel . Ran near field Magnetic and far field inductor test.
A magnetic array in the pattern of a checkerboard (near field) will pick up a War Nickel but not the alloy that Henning used. Easy to build ! (with Parts from China) ...AND The Henning's have a unique signature in (far field) Using a TFDwall very cool! May help with finding the sixth date! Lots of other posts on the Henning nickels here on CCF.
The 9% manganese make genuine war nickles lightly magnetic very light! a single magnet generally won't do it.
Is anyone interested in more specific details on building their own? This is an improvement over very powerful single magnets. Even hard drive magnets will not do what an array can do.
Nice. With that matrix, you're also likely exploiting the diamagnetic properties of the silver (which might be stronger) on top of the paramagnetic properties of the manganese.
I'm definitely not a Jefferson expert, but the two coins doesn't look alike at all..
Where's the mint mark on the right one?
Also, if they wanted to create a reliable fake, why not make it a bit magnetic. I'm not a chemist, but both iron and nickel are magnetic. It seems all they need is to use a bit more iron/steel and a bit less copper. I don't see any reason it'll change the color of the coin, and it's also cheaper.
I was lucky enough to snag one off of ebay recently, but since cash was tight, I declined to nab a second one for the same price. I'm kicking myself over it now.
EDIT: We also have a resident Henning Nickel expert who I assume will be chiming in any minute...
Diamagnetism is a bit more complex than simply repelling, especially with silver. If it's subject to a *moving* magnetic field, it will create magnetic force in the opposite direction of that field proportional to the motion (and the strength of the magnet).
For example:
etLztHDUyjQ
With your matrix, there, it might be able to pick silver up or move it around easier by causing more flux. :-)
Edit: This guy's explanation isn't *quite* how it works ("vortex"? nah), but he demonstrates the principle.
Just pinched the snot out of my fingers! trying that, when loose magnets flew across the table to the ones I was holding! and ouch! never say no way Thank you Steve!
I have not been able to repeat his experiment (YET) Best is a very very slow fall. Not stuck.
Quote: If it's subject to a *moving* magnetic field, it will create magnetic force in the opposite direction of that field proportional to the motion (and the strength of the magnet
Tokenmast, could you rerun the test comparing the Henning with a non-war alloy nickel such as 1941 or 1946? Henning didn't know about the wartime composition and made his counterfeits from non-war sheet stock suposedly bought from the same supplier who supplied the mint with their stock. The compostion was very close. In fact suposedly when he was caught the mint confiscated his material, realloyed it to tweek it in and then used it.
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Posted 02/04/2013 3:28 pm
