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[atomicscott]

The only reasons I can come up with would be an adjacent target, too high of Sensitivity, improper ground balance, or an electrical interference problem. Unfortunately, once excavated, it is extremely difficult to duplicate the situation. Out of curiosity, what does it read, now that it is out of the ground?

As to numbers and notch bins.......the notches are set, based on what we commonly refer to as conductivity. However, what we call conductivity is actually a number that the engineers assigned to a given target (and associated notch segment), based on the time constant (delay) between the transmitted signal and the receive signal. The target's time constant is determined by the metallic conductivity of the target, and it's inductance. Inductance is the

 

[BillF]

Scott,
I find lots of 1935 Washington State tax tokens. Size of a quarter, made of aluminum. They come in at a solid 42 making me think quarter every time.
Size is important. Geez, did I just say that?

 

[foiler]

Your assuming that there is someyhing deep to find. Give us a bit more info. How old is your church and the date range of the coins you found.