I'm very new to the E-Trac, and the hobby in general. Bart can attest to that, since he sold me the E-TRAC. Thanks again Bart. It was definitely a "game changer". Now I've only been using it for less than two months, and this is what I've learned. First, I went on YouTube and watched a lot of videos. I wanted to know what the tones sounded like passing over different targets. This is where I made a gave mistake though. I focused too much on the "perfect signal", and as I've found, it doesn't actually exist in the field. There's always a variation due to soil, trash, depth, and angle of the target. I just dug a 1898 Barber dime the other day and put a video up of it, and as you can see while I'm swinging over the target and calling out the Fe-Co numbers, they're constantly changing. What doesn't change, is that they stay what I like to call, inside the "box". The "box" being the pattern. If it's repeatable, and inside the box, you dig it. Does it have to be repeatable from two angles like people always tell you? Absolutely not. I've found Mercury dimes on edge that only hit at one slight angle, and even when you wiggle the coil over it it's still iffy and not always there. Why do I dig iffy non-repeatable targets? Because if it's there once or twice and your machine is "seeing" it, then there's a possibility that it's there. Also, if the Fe-Co numbers are inside the box even on a few hits, then dig it. Sometimes it's a false signal due to an old iron target, but it's always worth digging. Slow, and low, and on EVERY signal, back over it and wiggle that coil. Wiggle it so much that people think you have Parkinson's or Epilepsy. You're listening for that signal to be there, and what the box is telling you. Over time you learn that those 12-40 signals are usually twist caps, but not always, and a few wheats will pop in there.
Now this is what I have my machine set-up for, and what I've found in two months using the E-TRAC:
Sensitivity: set at Auto +3.
Deep: ON
Fast: ON
Pattern: Bill S custom trashy park pattern called "newpark". You can grab it on this forum.
Targets; DIG EVERYTHING THAT FALLS IN THE PATTERN. This is the ONLY way to learn what's what. You'll figure it out very quickly, and in the process grab a lot of good stuff.
SLOW & LOW. Great motto to work by. Take your time in any area you're working, and always re-wrok the area over and over. Different angles of approach will reveal things you missed on prior hunts.
What I've found in under 60 days on the E-TRAC:
14 Mercury dimes (best was 1916-S)
2 Barber dimes (oldest a 189

1 Three Cent coin from 1865
3 Buffalo Nickels
8 silver Quarters
5 Indian Head pennies (oldest 1889)
2 Rosie Washington dimes
109 clad Quarters
172 clad dimes
377 clad pennies
83 Wheat Pennies
OLDEST FIND: British King George III Rex half-penny, late 1700's. This signal was a foor deep under a tree root, and rang in at 1-40 on the Fe-Co scale. Wasn't repeatable at all, but was there when I wiggled my coil over it. Took a chance on it because I was skeptical, and it's been the greatest dig for me to date.
NOTE: I'm a rookie at all this, so take what I've said with a grain of salt. I've been very fortunate to have a very old park to work in, and chance has gone my way. It all boils down to digging targets even when you're not sure, because none of us are ever really sure until we uncover the target. Good luck, and I wish you all the success. -Ron