Half dollars nulled out in factory coin program

[Steve from Ohio]

I was doing some air testing with the E-trac and was using the factory coin setting.

02-46 is the reading on a silver half dollar.

The null on the factory setting for coins has taken out part of the half dollars reading. It nulled the half dollar when the coin would go one way and not the other.

So if you are hunting and looking for silver half dollars, make sure you take out the null in the upper right corner with readings of 01-40 to 01-50.

Not sure why the factory put these nulls in US half dollars.

 

[MikeInSF]

Hi Steve,

This came up on another forum, so I tested a bunch of halves that I have and here are the results (air-testing, stock coil, factory Coins program):

coin ferrous conductivity
BH 11 47
WLH 10 46
WLH 12 46
WLH 11 46
WLH 4 47
WLH 9 47
WLH 3 47
WLH 9 47
WLH 6 47
FH 10 46
FH 8 47
FH 7 47
FH 10 47
FH 6 47
Clad half 12 47

BH is Barber half, WLH is Walking Liberty half, FH is Franklin half (I didn

 

[Steve from Ohio]

Hello Mike.

Here's what I have been hitting:

Walking Liberty Half : 03-47 on all angles. Pretty consistent.

Kennedy 1964 Silver half : 01-46
I've tried angling them and I still hit them in the 01 to 02 ferrous range no matter how I angle them. They have been very consistent no matter how far away or how I angle them.

Kennedy 40% clad : now here's where things change a little bit. On angle it reads 01-47. Straight on 06-47. The conductive remains constant while the ferrous changes slightly.

I don't have any Franklins yet....but I am sure I will get them eventually.

I have been finding that almost all the clads will change on the ferrous readings if angled including dimes & quarters while the silve coins will remain somewhat constant.

I was not aware that it was discussed in another post. I should go back and read them all.

I was just learning the sounds last evening and this came up.

 

[Neil]

How about dimes Steve, I think a friend told me rosies nulled a bit also on the factory setting.?
something like that anyways.

Neil

 

[Rick(SoCal)]

We only had issues with the 64 Franklin (only year I have). The Walkers and Benjamins were just fine As far as the rosies, I have not had any issues both field testing and finding one so far in the field.

HH...........Rick

 

[Rick(SoCal)]

We only had issues with the 64 Franklin (only year I have). The Walkers and Benjamins were just fine As far as the rosies, I have not had any issues both field testing and finding one so far in the field.

HH...........Rick

Ooooppps...........I meant 64 Kennedy's

 

[Steve from Ohio]

Hello Neil.

Silver dimes hit at 12-45 pretty much all the time. Right in the open area on the screen and not anywhere near a null area. . Nice melodic sound too. Both Rosies and mercs. Clad dimes hit 12-44. I have found that in the field also but the ferrous can jump between 10 and 13 depending on the soil.

The one thing I did notice while air testing and learning the sounds each coin makes is that when air testing in pinpoint, the pinpoint indicator bar will slide back away from center as you move a coin farther from the coil. Not sure that means anything in the field.

I really love the pinpoint on the E-Trac. I have found it to be so accurate as to be scary. Of all the machines I've ever owned, the E-Trac has them all beat for pinpointing and everything else for that matter.

 

[Rick(ND)]

My Half's I tested seem to be ferrous around 3-5 and the E-Trac seems to pick them up fine, but put one on top of the other and they will null out. This also will null out with 3 quarter stacked in the factory coin program so what i did was use the learn option with the med cursor and learned them in which took a little of the hot rock reject off and this now works fine.

 

[Trocar]

[size=large]I remember reading that the E-Tracks' Coin program was based on foreign coins. It was made in Australia. Maybe that is why there is such strange readings on the composition of the coins and the nulling effect. That's my understanding.[/size]

 

[Gary in Daytona]

I know for sure that a silver Peace dollar (and probably any other old style silver dollar) nulls in the beach mode as well. Found that strange anomaly while testing targets for IDs. Not that you find that many on the beach, but I'm just passing it along for anyone interested.