When you say you have the "original" version, do you mean you have the blue box, with the white (bouyant solid) stock coil, right? Ie.: not the later evolution with the 950 loop, right?
If so, those don't get too deep, when compared to the latter/last Eagles, that had the black box, and came stock with the 950 loop.
As for what settings, do you have a specific question?
Just make sure that whenever you adjust the signal balance, that you re-ground balance each time you fiddle with it. And make sure you're balancing on a clean spat of ground. Because if you inadvertently come down over a spot that had iron, I think you'll get an incorrect ground balance. I used the Eagle for many years, and love it. But it's been so long since I've used an Eagle now (totall converted to the Explorer) that I can't remember everything, unless I went to refresh myself with the options. But if you have a specific question, fire away and I'll take a stab.
As for the "tone ID" on that, I'm certain that this isn't getting you any "deeper". In fact, because the tone ID was sort of wimpy on that (made low conductors sound really wimpy), you may in fact be subconsciously loosing depth, IMHO. Contrast to if it's turned off, you're more inclined to chase some signals, that you might have passed, if you were in tone ID. At least that's the feeling I had when using tone ID on that. Tried it on the beach, for instance, but felt it made the lower conductors just seeooo low sounding, that ....... oh well. I preferred the 2-tone mode, where your rejected targets come in at one tone, and your accepted targets come in at the higher tone. That way, you could hear your iron (as the rejected sound, of course) to aid you in guessing target placement in junky sites.
Another thing I liked was to turn ratchet pinpointing OFF, and vco ON. Those aren't to get more depth necessarily, but they greatly enhanced the feeling of mental imaging of what's going on with the targets you're sweeping through.
