Yea, I need to give it more time. I bought a cheap F2 because every youtube video or forum I went to said it was the easiest to learn. I had planned on taking the grand kids to some local parks to find shallow easy clad coins just for fun, not profit, but I get weird sounds and unable to pinpoint targets very well.
I used an F2 for three seasons and over 1000 hours my $200 investment netted me over $2000 worth of clad, silver, gold plus relics....and a whole lot of fun.
I must have written about 1000 posts about how it works, how i used it and everything I discovered as I learned it plus hundreds of quality finds.
Sounds are not weird, or not supposed to be, there should be 4 distinct tones and pinpointing is right on if you are doing it correctly.
Start 8-12" inches away from your target then hit the button...slide your coil toward the target area and when you get the loudest tone and lowest numbers the target should be under the center of your coil.
As far as the tones most times they are crisp, clean, solid and clear if you get the center of your coil over them.
There is even a slight difference in the tones, after several hours I could tell a quarter from a dime or copper cent without looking at the screen even though they all had supposedly the same high tone.
Before I put it away I was starting to do that on dimes vs copper cents too even though they were very close to each other.
Did you buy this new or used, what kind of coil do you have mounted and do you have more than one?
If used there is the possibility that you have an electronic or coil issue.
For all the owners that used this one, and there are many, I don't remember anyone complaining about strange noises or pinpointing issues.
They will squeak and false high with numbers into the 90's over big iron but over normal targets they are usually pretty stable and precise...especially on good targets like coins and rings.
For most of us this is a coin assassin...I won several awards at my club meetings while using mine including best jewelry so much they said I couldn't enter anymore and most coins found in a year for three consecutive years running.
Try this...
FTP swears there is no factory reset on this thing and there has never been anything written down about doing this in any manual or paperwork but I and uncountable others have done this when these units start acting wonky and 99% of the time we swear it brings them back into line.
When you hit the power button keep your finger pressed on it for about 10 seconds after it starts up.
There will be no indication whatsoever on the screen or in the tones to say anything has happened or changed but after doing this most of us have seen good results.
Try it and report back with exactly what you are seeing and hearing if it still acts weird.
I will try to help as much as I can because I know this one much more than well.