Ive been going through this very problem for a while.
I got a 2nd hand 4500, came with just the 2 standard coils from the package, 11dd and 15x13 mono.
1st time I used it was with the 11dd, and it was just a dream, quiet and stable, so easy to use.
My mate has an sdc2300, and was pulling the odd nugget here and there, I ran the dd over one, and didnt get a signal. It wasnt a bad size, maybe .5gm.
So I ordered a 14 x 9 evo. This time, when I used the factory settings, it was all over the place, just swinging it left to right it was really noisy, sounded like false signals.
So after about 5 trips (pretty hot ground) and a few phone calls, as well as a post here about settings, I ended up in enhance, mono, rx on 10 or 11 and stabalizer on 5 or 7 depending on where I was. I ground balance in fixed, and re balance pretty regulary.
With these settings, I find that the evolution runs nice and quiet and although I havnt found gold on these settings yet, I find tiny bits of iron and tin, and it still gives me a sharp response on those.
At a different location, I run factory settings, and pulled a half grammer with it, on factory settings.
If you cant get a steady threshold, turn the stabalizer down to a lower setting untill it evens out. The lower the number, the more steady it will become.
With rx gain, the higher the number, the more sensitive, and deeper it will become.
hope I explained it ok, this works for me, I will be going through this process again tomorrow, running a new coil, 15" evo spoke.
I got a 2nd hand 4500, came with just the 2 standard coils from the package, 11dd and 15x13 mono.
1st time I used it was with the 11dd, and it was just a dream, quiet and stable, so easy to use.
My mate has an sdc2300, and was pulling the odd nugget here and there, I ran the dd over one, and didnt get a signal. It wasnt a bad size, maybe .5gm.
So I ordered a 14 x 9 evo. This time, when I used the factory settings, it was all over the place, just swinging it left to right it was really noisy, sounded like false signals.
So after about 5 trips (pretty hot ground) and a few phone calls, as well as a post here about settings, I ended up in enhance, mono, rx on 10 or 11 and stabalizer on 5 or 7 depending on where I was. I ground balance in fixed, and re balance pretty regulary.
With these settings, I find that the evolution runs nice and quiet and although I havnt found gold on these settings yet, I find tiny bits of iron and tin, and it still gives me a sharp response on those.
At a different location, I run factory settings, and pulled a half grammer with it, on factory settings.
If you cant get a steady threshold, turn the stabalizer down to a lower setting untill it evens out. The lower the number, the more steady it will become.
With rx gain, the higher the number, the more sensitive, and deeper it will become.
hope I explained it ok, this works for me, I will be going through this process again tomorrow, running a new coil, 15" evo spoke.