What is the highest Ferrous

[Arturo de Zorro]

number in which you have found a coin. I have seen 20 ferrous with conduct in the 40's, just wondering where would be the cut point going down screen when iron items take over no matter how high the conduct number show. Those guys that have found coins touching iron, with rust stains or find a couple of nails in the same hole with the coin should have some input. I have found some coins with nails using mostly the concentric coil maybe because of the narrow search point and no surface trash but my 8" concentric is good to about 5 inches in depth, this is when I get coins with ferrous # around 20. Here is a pic of this weekend relic hunt

 

[Arturo de Zorro]

n/t

 

[tmanfromtexas]

I think this is a great question that I myself would like to see the answers to. I have found coins that bounced all the way to 20 on ferrous but werent locked in. They bounced from 10-20 with the conductivity staying fairly consistant. TMAN...

 

[albuilder]

I think this is a great question that I myself would like to see the answers to. I have found coins that bounced all the way to 20 on ferrous but werent locked in. They bounced from 10-20 with the conductivity staying fairly consistant. TMAN...

Same here.

 

[JohnTN]

I have dug deep coins surrounded by nails that had the ferrous #'s jumping all over the place sometimes into the high 30' s but the one thing different about the signals is they sound very full not the washed out like iron does. I like to circle the targets doing the minelab wiggle with the coil ( like we used to do with the old Sov's ) and see if the tone changes, now I'm not talking about breaking up but the actual frequency of the tone changes. If the tone remains pretty consistent even if it breaks up in say 90 -120 degrees of the 360 degree circle this is a dead give away for a conductive next to iron. If the frequency of the tone changes and you can only get the signal from say 45 to 70 degrees, leave it's iron. BUT be careful if the frequency of the tone changes but the signal remains pretty much solid as you circle the target it is probably co-located with a higher or lower conductive and possible iron.
Sound wins out every time with the Etrac if you rely solely on the FE/CO readings you are leaving a lot of goodies in the ground.
If your searching for deep, deep, deep targets. You can't always rely on the auto-sens. Example: How many times have you heard the sound start to ramp up then wash out and you swing back over the suspect area where the weak ghost signal came from and you don't hear a response? Be careful with these - this is where you need to go to MAX manual sens and swing back over the suspect area not once but multiple times. You see the Etrac has to cycle through all of it's frequencies in order to evaluate this weak on the edge of detection signal if it's a deep conductive and you work it properly the Etrac will lock on.
I have also noticed that at times the Etrac will up and down average deep targets with sound and ID. I have found Buffalo and V nickels that sounded and behaved like old pre-1940 wheats FE 12-20 CO 35-40, the coin was up-averaging do to it being co-located with a piece of trash or sometimes another coin. I have also found deep barber dimes that behaved like a pull tab, they were down averaging either by being co-located with a piece of trash, another lower conductive coin ( nickel ), or just extreme depth and ground mineralization.
Depth of the targets are a great means of discrimination also.
Well I guess I've rambled enough, sorry if I got carried away there.

 

[Arturo de Zorro]

It seems from the response that more use the coin program and then flip to the Quick Mask to check iffy. I will stick will 22 horizontal and flip to quick mask all metal.

 

[NiagracountyNY]

I keep quickmask All Metal also ...I switch to it and check the iffy ones..I also run in auto sens plus 3 all the time..On those tiny signals I will switch to Manaul sens fast and check..The combination of The sound of the signal,The depth ,and how the cursor responds on the graph you can really Tell what you have 90% of the time..Im lucky to have good soil our way so That isnt an issue with my Hunts.I never Use the stock coin program either,,,You will miss alot of coins with that in the US.I got a rotted Penny from I think the 80s 90s the other day that hit in the nickle area...I couldnt figure that one out....I guess sometimes soil position/trash and coin decay in this case can cause some strange signals.If we dug them all tho I really think wed end up with less Good Stuff..Just not enough time to diggem all.Have to Dig the Good Ones and Maximize our Chance of making good Finds.