1 oz Kangaroos weigh slightly more?

[TreasureHunter]

Hi,

I was wondering if it's a common "flaw" that 1 oz silver Kangaroos weigh slightly more... 31.3 g/31.4 g/31.5 g or is the scale just dodgy?

It is not the same case with other coins, which generally weigh 31.1 g-31.2 g.

 

[leo25]

Here are the weights of some of my silver coins, as you can see no silver coin weigh 31.1g. Also note im using 2 different scales, so my readings are correct.

2016 Kangaroo 31.4g
2014 Kookaburra 31.9g
2011 American eagle 31.4g
2014 Maple 31.3g

The reason they do this is because it will be to costly to produce if they had to make sure it's 31.1g to the dot. So they go a few grams over to make sure the minimum weight is 31.1g. So you get about 25c of silver for free or i guess they just ad that cost onto the premium of the coin. :/
Only for say gold or platinum is it worth the extra production cost to make sure its 31.1g.

 

[leo25]

While i have you here can you please do a ping test on your Silver Kangaroo and tell me if you think the ring sound stops much faster on this coin then say an American eagle or Kookaburra.

if you're not sure what a ping test is here is a video link https://www.youtube.com/watch?v=GajK6Vrh2Rs. Btw I'm not suggesting this coin is fake, but just that it sounds flat.

 

[leo25]

Here is the sound wave over 1 second, as you can see the Eagle is producing something much nicer. I can image a lot of time went into design the American eagle to get it sounding like that.

Both coins main response is around the 3.8kHz frequency so that's all good.

 

[Ipv6Ready]

Leo genuine question, you think a mint will put in that much effort for sound.
I would have thought a nice accident?

Though it would be a great series, ... The Musial notes.....
The majors series one
Minors series two

 

[leo25]

Leo genuine question, you think a mint will put in that much effort for sound.
I would have thought a nice accident?

Though it would be a great series, ... The Musial notes.....
The majors series one
Minors series two

It's possible. It's a coin they are going to use for a very long time, so why not. The 90% Morgan also makes an great ringing sound too. Is it just coincidence that American coins sound the best? could be i guess, but it could also be by design.

 

[Killface]

^^ I imagine it is a consideration. All those radial lines on the Roo probably dampen the vibration a lot.

Making a coin that rings nicely is probably not a very complicated matter. Symmetry, weight distribution, some blank space..

 

[scrooged]

^^ I imagine it is a consideration. All those radial lines on the Roo probably dampen the vibration a lot.

Making a coin that rings nicely is probably not a very complicated matter. Symmetry, weight distribution, some blank space..

Maybe.

Nice post Leo.
Is there a possibility we could get a reading of ASEs throughout the years to see if there's a variation between them? Could be an interesting experiment, if you can be arsed that it.

What year was the ASE you used?

Cheers

 

[leo25]

Nice post Leo.
Is there a possibility we could get a reading of ASEs throughout the years to see if there's a variation between them? Could be an interesting experiment, if you can be arsed that it.

What year was the ASE you used?

Cheers

Thanks. The ASE i used was 2011.

I would like to do all coins and also years, just need to find the time Also if doing a large selection of coins i have to work out a good control method so all coins are in identical situations.
Maybe people can donate coins for me to test hehe

 

[T0rchL1ght]

Here is the sound wave over 1 second, as you can see the Eagle is producing something much nicer. I can image a lot of time went into design the American eagle to get it sounding like that.

Both coins main response is around the 3.8kHz frequency so that's all good.

I made this just made this account, because I wanted to thank you for this post. I was worried about an ASE I got, not anymore.

 

[Ian Gillman]

It is probably due to the different local gravity between Oz and the UK. Everything is a little bit different down under anyway ;-)