US Pennies compositions & TID's for CTX3030 & Etrac

[pulltabfelix]

Ever wondered why pennies ring up so differently? Well you probably knew, but here are some more detailed results tested on the CTX3030 in the Ferrous-coin mode with the pennies on a patch of ground cleared of any other metal.

You can easily see from the data that the TID values change when the composition or weight changes.

 

[cw3]

Ever wondered why pennies ring up so differently? Well you probably knew, but here are some more detailed results tested on the CTX3030 in the Ferrous-coin mode with the pennies on a patch of ground cleared of any other metal.

You can easily see from the data that the TID values change when the composition or weight changes.

View attachment 22405

I have pennies from the 80's and 90's ring up 12.46.

Tell me why!

 

[pulltabfelix]

I have pennies from the 80's and 90's ring up 12.46.

Tell me why!

Correction to chart: 62-82 has .950 copper and .05 zinc. no tin. oops on my part copied it down wrong.

but on your 80's and 90's pennies I don't know. Were your 12.46 readings that you swung over or air test? Maybe mineralization in your ground is changing the CO value. I have also heard that if it is deeper the values can change. But not 100% sure on any of this. my test were pure air test with the pennies laying on ground that I swung over to make sure it was clear of any metal. Plus my mineralization is medium.

 

[cw3]

Targets in the wild.

I don't do air test or a test garden. All done in the wild.

 

[pulltabfelix]

Ok, lots of corrections here. I should not have created this chart from the very small print out of "A Guide Book of United States Coins 2019 by R.S. Yeoman, 72nd edition when I had this head cold.

Here is the corrected file. I hope I got it right this time, I don't wish to mislead anyone with bad info.

The test was an air test on ground I cleared with my CTX3030 to make sure no other metal items were in the ground. Height was about 7" above the ground using Ferrous-Coin mode. My ground is moderately mineralized but that should not have affected anything since it was an air test.

Sorry for the goofs.