gabbyhayes said:
I guess one of my questions is whether GC or FC will help or hurt my situation????
Hi Gabby,
It's not perfect, but I've found that Ferrous-Coin is the best of all the modes at identifying our steel coins while still allowing you to reject nails, etc. I can send you the .mlf file if you like, but the main things are:
- Target Separation: Ferrous-Coin
- Response: Long
- Pintpoint type: sizing
- Recovery Fast
- Tone ID: 50CO
- Discrimination: generally open except for lower-right corner (for example, 5x5 cell block)
Discriminating the lower-right corner will get rid of most nails.
In ferrous-coin, the FE number for most objects of interest will be 11-13.
When you go over a steel coin, the CO number will be in the 15-20 range, and there will be another target in the lower-right corner. Even though that region is discriminated out, you will still get audio because of the first target in the 15-20CO range.
When you pinpoint, the resulting target will typically create a 'smear' from about 15CO to 25 or 30CO. The smear will be fairly narrow, usually still in the 11-13FE range.
The above seems to work a bit better with the 6" coil rather than the stock 11". I'm not sure why.
Also when pinpointing a steel coin, you may find the target sounds off on the edges of the coil but nulls in the center, unlike silver coins. I thus use the edge of the coil in pinpoint mode when deciding where to dig.
Other tone ID profiles will work, too, but I seem to get audio more reliably in 50CO than in, say, Combined.
In Ferrous-Coin, our older nickel coinage typically reads from 30-35CO. Silver still reads up in 42-45, as it does in most modes.
Hope this helps. Let me know if you have questions about any of this.
-Ken