Difference between all metal and relic mode

[littleoldman2]

Just got through reading all this forum 315 pages. What a wealth of information. Thought I was in college again WHEW!!! Got the pinpoint got the twitch got the itch for a 250. Question hope I formulate it correctly. Just what is the difference between the all metal and the relic mode? That is how do they actually differ? I am a debit home service insurance man. The area that I cover is about 600 square miles. Have a couple of schools, couple of city park complexes and many, many old home places no problem to find places where I can detect. The State trooper corp.is a lodge brother and a friend so are several sherriff DPs I am making myself available to them for CSI stuff if needed. Also will be a member of both the local museum and historical society. Think I'll get me a windbreaker and have XXX county historical society and museum emblazoned on the back. May stop some questions? I am located square atop the Huntsville meridian half way between Birmingham and Guntersville Al. Be back with more questions, comments and pictures when I get my MD. "LittleOldMan"

 

[NM5K]

As far as the ace 250, and staying in motion ID mode, the relic mode just cuts the
lowest notch off. All the conductivity notches are open in the "all metal" mode.
So if you are in relic mode, you would hear everything except for the lowest
notch , which is lower conductivity iron. As a comparison, the "jewelry" mode
cut the two lowest notches. So it's restricting the beeps from the two lower
notches.
Now sometimes "all metal" mode is used to describe a different thing.
That would be a non motion mode where you constantly hear everything you
pass over with a continuous audio tone on every target.
And the ace 250 can actually do that too. You just press and hold the pinpoint
button. It is then running in what many people consider a true "all metal"
mode. Sometimes I actually use it that way when hunting.
But as far as the normal motion ID mode, the different modes just notch
different areas of the conductivity scale. And unlike some older machines
with different technology, there is no reduction in performance when notching
on the ace machines. IE: there is no reduction in depth performance on coins
if running in the "coin" mode, vs running it in the "all metal" mode.
The reason is that the notching on the ace machines is purely an audio
notch at that range. The machine itself is always in all metal mode, no matter
what mode is displayed. You can verify this by noting it still hits on and shows
low iron on the display, but you won't hear anything. All it does is kill the audio
beep response on those notches.
On older technology, using discrimination often reduced sensitivity on the
undiscriminated ranges. You don't have that problem with the ace machines.
Myself, I run "all metal" almost all of the time. I like to hear everything.
I might not want to dig the iron, but I still like to know it's there. Some of
it I do dig if I think it might be a relic or whatever.
If I'm actually relic hunting, I dig everything.