I just got a tejon detector been using a bounty hunter found only 1 coin with it didnt know how bad it was till i got a good one . Trying to learn the tejon found alot of pennies and pull tabs , how does one discriminate between nickels and pull tabs ? Some tabs hit just like a nickel it seems , i never relised there was so much metal around, been hunting old home place and school yard . My best finds have been a wheat penny and a 1951 Canadian penny . I currently dont have any head phones, do they help , it seems the coins hit harder and clearer, I have been running the discrimination just past the tab mark cause im tired of digging . Does the old coins hit as hard as the pennys or am i missing alot running high disc ? Thanks