Silver Dollar FE-Co numbers can vary--a LOT

[C&RHunter]

This post stems from the post by Gonehunting "CTX Finds Big SIlver" . I noticed his TID numbers for a silver dollar were 12/43-45. I knew my machine a silver dollar reads 1/33-36 (set on High Trash)depending on the angle of the coin when scanned. I know air scans may produce some difference in numbers, but didn't think it would be that drastic. I questioned him, about the possibility of other items in the ground around his find being the cause of the lower TID numbers.

His reply: "Very glad you mentioned that.. I scanned the Morgan again in the program I use, which is a combined ( My Combine Settings ) and It hits a solid 12-41, from what you said and what I remember on the E-Trac, I switched over to 50 tone conductive. and bam 01-34 and 01-35. that is interesting... I can't explain that other than possibly the size and density of the silver.... not sure."....

So I fired up my CTX grabbed some coins and started scanning the results are shown in the box below....Very surprised with those results.This was me, air scanning the coins listed, the numbers can always vary some scanning that way. Notice the silver dollar and half dollar readings....The change in the TID number was the result of ONLY changing the Target Separation setting. Changing the profile type did not seem to be a factor. You guys check this out, and let me know if I have made a mistake here..........

The silver dollar is only on the FE 12 line in the Ferrous-Coin setting and the half seems to be about the same in the Ferrous-Coin and the Ground-Coin setting and then different for both the high and low trash settings.

 

[Reeseb]

Thanks for posting. FE-Coin really does change the numbers around! I'm not sure yet if I'm a fan.

 

[pspr]

Wow. Some of those are pretty big changes. It seems the larger the silver the bigger the shift. I wonder if other targets have similar shifts. Probably just larger targets like large gold rings and jewelry. Thanks for data.

 

[Gemini13]

Very interesting. Thanks.

 

[timholliday]

It seems that the CTX puts good targets in the 12 line in the ferrous coin mode. The ferrous number on the Etrac would sometimes drop on good silver targets. All of the silver I've found on the CTX have been 11-12 including silver rings.

 

[Big Boys Hobbies]

Good post. Something to think about.

 

[Larry (IL)]

Thanks for the data chart, it looks like I will dig more of the 12-42 that I pass up sometimes, they have always been copper memorials to me.

 

[greenmeanie]

I tried it with a half dollar and it falls lower using ferrous-coin or ground-coin but it stays far right.

 

[texasranger]

Hey guys, let's do it all again, but with very low sensitivities, which should help to reduce variability's to a minimum.

Will someone start the ball rolling and provide a 'standard' set of 'air-test' measuring parameters?...thanks

 

[greenmeanie]

[video]http://www.youtube.com/watch?v=5gLBBC2Q_4A[/video]

All stock settings except changing target-speration.

 

[C&RHunter]

The sensitivity I was using when the above air test for the chart was done was Auto and was 16. That is lower than I normally hunt with. I just put it in manual, lowered the sensitivity to 1. The results are the same., the silver dollar reads 1-36 in high-trash and 12-42 in ferrous coin. Then raised sensitivity to 30, the very same result. This was an air scan of a 1921 Morgan US silver dollar. I'm just trying to make the new CTX users aware, that there may be a TID difference in very large silver coins, depending possibly on the particular Target Seperation setting they select. They can run the same test with their CTX, to determine if there is something to my findings or not..........

Hey guys, let's do it all again, but with very low sensitivities, which should help to reduce variability's to a minimum.

Will someone start the ball rolling and provide a 'standard' set of 'air-test' measuring parameters?...thanks

 

[Gonehunting]

I agree with what you have posted.. the FE-coin setting seems to be the only one that drastically changes the tid of the dollar coins.. I tried it on 2 different solid 01-36,01-39 targets today while hunting and then I switched to another mode W/the high trash setting and they were jumpy and erratic.. so this may be a way to double check the 01-30's numbers to see if they are actually big silver.. further tests on this is definitely in my future..

 

[DigaDiga]

Brings me back to the "I'm going back to diggin everything" philosophy. You just never know what's under the ground...

 

[spdnj]

I think this has a direct correlation to why some people are having so many issues digging bottle caps. On the Etrac they used to come in on the FE 1 line, now there are times for me they come in on the 12 line. I have actually seen bottle caps in the ground that initially start on the 12 line then when you continue to rescan will move or bounce to the 1 line and vice versa. I would be interested to see if that can be done with a silver dollar.
It seems like Ferrous coin is doing some type of averaging at times and I think the soil conditions drastically affect this average.

 

[greenmeanie]

Ground-coin does it too.

 

[C&RHunter]

Ground-coin does it too.

I just rescanned the coins flat about 3-4 inches from the coin. The silver dollar only read on the 11-12 FE line in the Ferrous-Coin setting. But the silver half read on the 11-12 Fe line in both Ferrous-Coin & Ground-Coin settings. For me, that was the same results shown above in my original test. I may not have mentioned the half was affected with two settings and the dollar it seems only one...Thanks.

 

[Gonehunting]

Here are snap shot of each Target Separation while scanning a Morgan dollar.

Ferrous-Coin

High/Low-Trash

Ground Coin

The interesting thing in Ground coin is that the ID number is 12-46 along with the target crosshairs, but the target trace shows up in the 01-30's/40's.. not sure why, scanned several times on a few times did the crosshair's jump up to the top of the screen, but the ID number stayed on 12-46/47...
Hope this helps..

 

[firefighter254]

all the silver ive dug with the ctx 3030 in ferrous coin are coming in at 12-42 range even the standing liberty quarter came in at 12-42 12-43 just make sure if your using the ferrous coin mode you dig those numbers you could be missing silvers. I can say that all the silvers at 12-42 12-43 that i dug where at 6in anything shallower was just clad

 

[C&RHunter]

Here are snap shot of each Target Separation while scanning a Morgan dollar.

The interesting thing in Ground coin is that the ID number is 12-46 along with the target crosshairs, but the target trace shows up in the 01-30's/40's.. not sure why, scanned several times on a few times did the crosshair's jump up to the top of the screen, but the ID number stayed on 12-46/47...
Hope this helps..

Gonehunting

I rescanned in the stock Coin Mode - Pattern 1 using the Ground Coin setting. I don't know why, with a good solid repeatable scan with my machine, the crosshairs will every now and then drop to the 12/42 range, but not often, but even then the shaded area stays up at 1/36. The shaded area stays at the 1/36 area no matter what. Our results may vary a little due to the actual machines and scan speed, other settings, etc. But I think we both can say, Ferrous coin setting the silver dollars are for sure reading and shading the 12/42 area. I checked the manualk agin and did not see any references to this be normal for the Target Seperation settings. I would imagine we will hear someting from some others that may shed some light on this.....As long as we know this differences, we can deal with it. I would hate to set up a program with that top line blanked out, on the assumption all/most silver will be on the 12 line, and for some reason change to high/low trash (and seems for me Ground Coin), thereby eliminating the possibility of those big silvers.....

Where is that screen shot located. I've seen it but coulnn't find it a few minutes ago.

 

[Gonehunting]

hold down the personal button, and its at the bottom of the list, once selected, then when you want to take a snap shot just push the button. to get to them usb to computer and open the ctx and the first folder is screen snap shots..