haha, when I read the title to this post/question, I
KNEW there would be chevy-ford inputs, haha
As a lover of explorer series, and having hunted along-side some Garrett users (although not the AT-pro though) I would favor minelab products. But as has been pointed out: If "noise" (crazy sounds to interpret) is a factor, then yes: get used to an entirely different breed of sounds to get used to. Explorers and etracs can sound like a flock of sick geese to the un-initiated. You will wander around and not be able to distinguish deep vs shallow, mids versus highs, and so forth, at first.
But there's some tricks to help alleviate this:
a) hook up with a proficient etrac or explorer user. Ie.: one who "routinely comes in with the turf oldies" type hunter. Have them flag targets of various analysis. Eg.: this one's a shallow zinc, this one's a penny/dime at 4", this one might be a wheatie/silver at 7", and so forth. Watch how they're doing it. See how they swing. See/hear what sounds they're trying to isolate. Ask why other signals they'd pass, and so forth.
b) if you have no one proficient around you like that, then here's another way: Start off by blacking out all your iron, and everything else from zinc pennies and down (yup, kiss gold rings and nickels and zinc pennies good bye). Go out to a new park or school prolific with easy clad. Spend several hours forcing yourself to dig boring clad dimes and quarters and copper pennies. Then the next day, repeat the above scenario, except to lower your blacked out area to allow in zinc. Repeat. The next day go out and lower it down to accept corroded zincs, square tabs, etc... and repeat. Continue to do so till you're finally down to where you're accepting all conductors.
Otherwise, if you just run out there with the 1) smart screen in conductive preset, or 2) screen wide open in ferrous, then you're going to be one confused person indeed !
