I got a million.
I have the 7" coil model and I tried out the 8" coil unit for a few weeks a couple of summers ago.
It is a bit deeper...how much I don't really know but it is deeper.
Seems just as sensitive as the ones with the smaller coils.
Here is some info I posted a couple of years ago to help out another new user on a different forum.
Notice the special tip.
Way back then I started to use the disc knob a totally different way than the one page "manual" says you should do to hunt with it or most other Tesorors for that matter and I never do it any other way with this one or my Vaquero.
I usually hunt with very low disc to get the deepest and clearest signals and then thumb that knob up to figure out the target.
I never stop when the target fades out and look at the position the knob is in as Tesoro says, I always thumb past the target to silence and then slow back down and listen closely to exactly how the target comes in instead.
Targets that are choppy, chattery, or have a decent amount of noise before they firm up...even a few clicks, are usually trash and I rarely dig them.
Good targets, coins, jewelry and the like will just "appear" most of the time and come in solid with very little if no noise.
Not all the time but most of the time and I can cut out digging about 80% of the trash out there doing it this way because it is way more accurate than the way Tesoro says to do it...WAY more.
Below is also a vid I posted showing the big coil model also possesses the unique superpower that all Compadres have where it will double beep on targets near, next to or even leaning on big metal like tot lot iron, fence posts and bench legs.
In the vid you can hear that it will even triple beep if the target is shallow and within one inch of the coil.
This is the only unit that I have ever run out of many different ones with several coil combinations and settings that can do this, and believe me I have tried, and it does this task effortlessly.
This is the main reason I recommend that everyone must have one of these in the arsenal no matter what even if only used for this purpose...but there are so many more on top of that, too, and the fun factor is another huge one.
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This is where is where metals will show up on your dial.
Forget the numbers, just study their locations.
The way you figure out what you are digging before you dig it, which is never 100% by the way, is to "thumb" that disc knob and figure out where the metals in the range you see in the picture go away or "disc out".
*Tip*....It is more accurate to turn the knob way up and then turn it down slowly as you are swinging over the target and stop at the area where you hear a tone come in, than to turn it up until it fades out.
Now you have done this and lets say it was silent till you got to the zinc mark.
Now you have a clue, and this hobby is all about taking all your clues and putting them together to make an educated guess.
From studying the picture, you remember that this zinc area should sound off if you have a zinc penny or other zinc item, an Indian head penny, a screw-cap or gold.
Might be some other things like can slaw, but it could be one of the first four, too.
Maybe you want to switch to all metal, now, and run your coil around the target area and try to size the target.
Where does the tone sound loudest and then fade out?
Hit it from a different angle and try to get a picture in your mind on how big it is...coin size, maybe a little bigger?
In all metal or turning it back below zinc on the disc knob, how loud does it sound when you scan it?
Really loud, maybe medium loud or softer?
This gives you a clue on the depth.
Another depth trick is lift the coil and swing over it.
Do you lose it at 3 inches above the ground, 4-5?
If you know your limit of your detector, and subtract the height of your coil above the target where it goes silent, this can give you approximate depth.
Now you decide to whip your coil over the target real fast and see if the tones stay solid from all angles or breaks up.
If it breaks up it could be trash, if not, still might be a good target.
All of these techniques are aimed to give you clues, and those clues will lead you to an educated guess and that will lead you to digging a hole...or not.
As you put in your time, you also start to hear slight differences in that tone.
A zinc penny might sound very solid and full and the same all the way through, but a screw-cap might not sound so full.
Maybe you noticed after locating and scanning hundreds of these that a screw-cap doesn't stay full, but maybe breaks a little right at the end.
It gets a little fuzzy.
You never could tell the difference at the beginning, but now, after much practice, you can hear that difference, and so you have another good clue as to what you might have sitting in the ground below you.
Solid tone, rings true, no breaking of the signal, small like a coin, really loud tone, can raise the coil pretty high before it fades out...I think this is a zinc penny that is about 1 inch down...then you dig it...and it is.
Or maybe not, like I said, not 100% in this hobby...ever...but you cut your odds down some on digging trash, and you made a good guess.
It's a process.
As you progress, your guesses get better.
The universe must be laughing at us that do this hobby because it made so many bad things ring up in the same areas as so many good things.
Aluminum hangs out where the high tone coins do.
Nickels and gold live in the same neighborhood as pull tabs...as a matter of fact, gold seems to live in almost all the neighborhoods.
Nobody is perfect, we all dig lots of trash, but the better you get the less trash you dig and the more treasure you find.
Study the picture, know your metals and where they line up in relation to your disc knob.
Then practice, practice practice.
Really listen and try to remember that tone you hear before you dig a target, then remember what target you dug after that specific tone.
It takes time for your instincts to kick in and this stuff becomes second nature, but it will eventually happen.
Once you dig enough holes.
That's how I do it.
https://m.youtube.com/watch?v=MmWzTo4GCak
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