Here's some initial ferrous and conductivity numbers for the E-TRAC...

[christopher-ohio]

The detector was placed in all metal, manual sensitivity of 15, quickly done in my upstairs bedroom which is as far as possible from EMI sources:

Coin Ferrous Conductivity Reading

Indian Head Penny:
Dug: 1897 12-35
1902 12-33

Non-Dug:1881 12-37
1890 12-35

Wheat Penny:
Dug: 1951-D 12-43

Non-Dug:1957-D 12-43

Shield Nickels:

1866, 1867, 1869 12-13

Buffalo Nickel:
Dug: 1916 12-12
1928, 1928 12-12,12-13

Jefferson Nickel:
Dug: 1973(red) 12-13

Non-Dug:1970-P 12-13
2005-P 12-13

Dime: 1942 Merc 12-45
1948 Roosie 12-45
2000-P 12-43

Quarter: 1986, 2001-D 12-46

$5 US Half Eagle 1882 12-30

Foreign:
Dug: 1899 5 ORE 11-39

Other:
Square Nail 34-44
Square Tab 12-15, 12-18 (slight shape variation between them)
Bottle Cap all over-didn't lock
Screw Cap 12-37
Small Early Flat Button 12-30
3 Ring Old Bullet 12-18
Dug Shot Gun Shell Bases:
Winchester Repeater No 12 12-15
Peter Target No 12 12-11

My 14K Men's Size 10 plain wedding band: 12-27


Just a very quick survey of some usual targets at old sites. I'll be interested to see what everyone else finds...HH

 

[digitrich]

My guess is the expanded conductive scale is going to be a great help in identifying similar targets, especially around Indians and modern zincs. Nickels to brass shells, thank you, thank you, ML.

 

[christopher-ohio]

I just checked a 1991, 1999-D, and 2007...sorry, the kids went back to school on Thursday before the last one and we all already have a nasty upper respiratory thing...so we're all a bit under the weather...I just figures since I've been on vaction all week

 

[digitrich]

I am assuming the zincs you checked were dug. Hopefully those numbers change in the ground some, otherwise an Indian, a zinc, and a screw cap are going to be hard to differentiate, all hitting at 12-37 Wait and see, I guess.

 

[Jim upstate NY]

n/t

 

[christopher-ohio]

Now that I think about it, you're absolutely right...maybe my settings are just not right because honestly I just read some of the manual, watched all of the MLOTV videos thus far, and used some Explorer settings knowledge. I had it in manual 15 sensitivity and all metal per the option in the settings...this baby appears to be awesome but more DFX-like in some ways for me...but I'm sure it will all make sense like with the Explorer-the light bulb went on and the settings were a breeze in advanced.

 

[christopher-ohio]

I'm sure that Indians will vary like anything else a bit on these and other factors. I would go out and hunt with it today but I just don't feel well enough yet...maybe tomorrow?

 

[digitrich]

Do you realize that every single target you tested came up with the same ferrous # of 12, except the nail???? Some thing's goofy. On the SE the ferrous values for all those targets varied from one another. By Mine Lab increasing the ferrous scale from 32 stops(0-31) on the ETrac to now 35 stops(1-35) the ferrous values for these items you tested should vary even more from one to another, not be the same. That just doesn't make any sense. I am confused now. Let us know if you figure it out.

 

[Joe of South Jersey]

This is my findings as well. I am planning more testing before writing another post of my own on the detector.

I have a couple of heavy mineralized beachs on the list for the weekend.

 

[christopher-ohio]

n/t

 

[MattR]

Hi Joe...Chris....Dig, and all.

The Fe 12 'consistency' is on first thoughts, somewhat odd.

As Dig commented, it doesn't seem right when viewed in relation to EXP / SE identities.

It would be very informative to have a 'pure' silver dollar, a piece of cooking foil (1 cm by 1 cm), and a straight pin, reading.

Can anyone oblige?

That should expose any problems, if they indeed exist.

Thanks to you guys for the feed-back.....much appreciated...MattR.UK

 

[christopher-ohio]

Straightened coins position
The ferrous coordinate of most coins in air is 12 +/-1, with slight deviations at the very high conductivity end. This makes it easier to remember the ID's of targets of interest or to note anomalies.

 

[MattR]

Chris, and all......If these results are 'normal' now, then it looks like Minelab have 'morphed' the Fe response in that sector.

I can see some advantages, but.........

Mmmmmmm? I'll sleep on that one...........G'dnight all.

 

[christopher-ohio]

1997P Proof US Silver Dollar 01-36
1979 Susan B $1 12-46
2000P Sacajawea $1 11-47

Large paper clip 35-35
Small paper clip 35-27
1 x 1 cm section of 13-01
cooking foil 1 layer
thick
Straight pin 35-03

 

[Joe of South Jersey]

n/t