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 Replies: 33 / Views: 11,287 |
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Pillar of the Community
Australia
750 Posts |
Well, it's all still a puzzle to me!  While that different sound is definately there, I just weighed 40 x 2006 and 40 x 2008 and they came up exactly the same. (Digital kitchen scales in 1g increments). The mystery remains  |
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Valued Member
 Australia
318 Posts |
Quote:
Try a magnet on these "odd" sounding coins, If they stick they are forgeries All 2006's I've had have the same sound....and they aren't magnetic - I've just tried one. |
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Pillar of the Community
Australia
2180 Posts |
Are they slightly thicker/thinner or wider/smaller?
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Valued Member
Australia
251 Posts |
I compared the thickness to other coins in sure there the same size might be of by 0.01mm so I tried to see if there magnetized with one of those really strong ball puzzle magnet things there is something bit different with it I can fill a ever so slight putt and push and when I put the coin and the little magnet on something flat the coin will push the ball magnet away and it also dose it with 1975 20c coin I have as well but its a bit stronger with this one as it will flip the line of 3 magnet balls around javascript:insertsmilie('  ') |
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Pillar of the Community
Australia
750 Posts |
Good timing Candace, I just measured the coin thickness of the two sets of 40 x 2006 and 40 x 2008. Measured each set, then the other, then repeated to check. (would expect minor variations in each set measurement due to coin rotations between measurements etc).
2006 x 40 coins = 91.84mm average = 2.296mm per coin
2008 x 40 coins = 91.195mm average = 2.279875 per coin
2006 thicker in that comparison by 0.016125mm
(only 0.71% difference, but a difference)
Was your measurement of 0.01mm ..... more for the 2006 than the others also?
(Off to find some magnets now).
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Valued Member
Australia
251 Posts |
About the same, I don't have that many to compare iv only just started collecting :) but from what I have here there a slight differences with all years. The magnets I used are the 3mm each one but very strong
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Valued Member
Australia
251 Posts |
The Unicorn did you find some magnets did you feel the slight push from any ? Iv been using one to see if I can make it more magnetic but its not working. I found the coins north and south and applied a row of these 3mm ball magnets to the coins north and south so that the coin would of become part of a circular currant and have left them untouched, but iv been doing this for about 3 days and every time I go and have a look at them the coin has pushed the bottom ones away? it wont magnetize it rejects being in any part of it javascript:insertsmilie('  ') Iv also tried using a strong bigger magnet by applying it from one side of the coin and softly moving it across the the coin contentiously in the same direction lifting it off and repeating, but this dose not work ether? it just make the coin more repulsive to magnets by pushing it away even more. javascript:insertsmilie(' ') |
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Pillar of the Community
Australia
750 Posts |
Hi Candace, I haven't forgotten ...... I have a box of speaker magnets in the shed (somewhere in the shed). As soon as I find them I'll be testing!
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Pillar of the Community
Australia
750 Posts |
Hey Candace, found some pretty powerful little magnets on a new glass message board that my wife just bought. Gave them a test against a 2006 and a 2004 balanced on their rim on laminate. Both were attracted more so on the edge half way up the coin and moved significantly towards the magnet when it reached what seems like an area of influence. The magnet could pass past much of the coin without any influence. Looking up nickel (25% of a 20c) it is one of four elements that are ferromagnetic around room temperature. So I think we're back at square 1.  |
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Valued Member
Australia
251 Posts |
Mmm I am impressed ferromagnetic nickel is always used with iron it just mightn't of been mixed proper or a little more iron was chucked in? All I know is now I have a coin that is pretty cool and the more I play with it the more it hates magnets javascript:insertsmilie('  ') |
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Valued Member
Australia
318 Posts |
Seeing as the Mint told me there should be no difference in the composition of the blanks used for the 2006 20c, and you seem to have confirmed this by the magnet testing - and that they weigh/size up within specs., the only other thing I can think of is striking pressure? |
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Valued Member
Australia
251 Posts |
Haaaa... I just found some of those French Caledonie a 100f and 50f if they were a bit smaller they would make the exact same noise when clinkerd...javascript:insertsmilie('  ') I might look a bit further into this, AND I promise that I wont get over excited than make a dill of myself till I have doubled checked javascript:insertsmilie('  ') |
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Valued Member
Australia
251 Posts |
I give up "for the moment" ill stick my 2006 20c in a dose my head in bag....javascript:insertsmilie('  ') You have one this time coin javascript:insertsmilie(' ') Edited by Candace
02/15/2013 6:32 pm
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Valued Member
Australia
318 Posts |
I have just found another coin with a funny ring to it, and that is a 50c 1994 Year of Family. I had a couple others stored somewhere that I'd found earlier, but they've gone missing....anyway, I have another from Friday's noodling, and it has a noticely sharper ring to it - more metallic and a higher pitch to my ears. It is a wide date version, though I found 3 wide dates in the 16 x Family 50c I had, but only one has the differing ring. I don't have accurate scales, but it feels ok in the hand, and I can't pick up any difference in color of metal, or edging. Curious to know if anyone has noticed this in the 1994 Family 50's? |
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Valued Member
Australia
248 Posts |
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I have just found another coin with a funny ring to it, and that is a 50c 1994 Year of Family.
Curious to know if anyone has noticed this in the 1994 Family 50's? I've got one of these, which I noodled a month ago, and it drives me crazy because I can't figure out what's wrong with it. I keep wondering whether it's a fake, but everything else about it looks genuine.  |
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Replies: 33 / Views: 11,287 |
First Page
Posted 01/24/2013 10:07 pm
