On the MXT, DFX, V3/V3i, E-Trac Indians sound, and present themselves as a Zinc Penny. The dead give away for me is when the depth reading indicates the coin to be at 5 to 8 inches. Deeper Indians, in all but the lowest mineralized strength soils, will elevate in response enough that you should be digging them irregardless. This happens more on the Whites detectors. I have dug deeper Indians (9 to 10 inches) and had them give VDI response in the 90's! The E-Trac is fairly accurate on ID at depth. This makes it a killer on Indians. On the V3/V3i/Vx3 the pinpoint will show the 7.5kHz frequency as dominant, followed closely by the 2.5kHz frequency. Plain and simple... you are going to be digging a lot of Zinc Pennies to get the shallower Indians. Put yourself in an area that has potential for coins of this date. Make sure and pay close attention to those Zinc hits in areas that have produced Barbers, V-Nickles, and early Wheat dates,or earlier date coins. Good luck, and please share your first Indian with us here on American Detectorist!
Keep Swing'in
Jack