Garrett Predator SeriesPrice: $250
Based on 5 reviews
Avg. Durability: 5.00
Avg. Ease of use: 3.00
I intermittently got a signal from the 6" coin, but just enough signal that it would entice someone to dig. The 4" and 2" holes had very strong readings. The surface, it gave me the intermittent signal at the 6" coin.
So to me, it worked perfectly fine and I would presume to think that about 5" in normal soil would be its max effective depth. I even pinpointed it with great accuracy, once I figured out how to do it(i am using a GTAx DD coil btw, not the stock con. Coil).
Now, when I read the reviews about how insensitive this thing is, I can't help but wonder if people understand what is happening. A metal detector is very similar to an NDT inspection process called eddy current ( I am NDI in USAF stationed in Germany) With eddy current, the higher the frequency you use, the less depth of penetration but more intense surface to near surface sensitivity, which was proven by my personal field test.
The lower the frequency, the greater the depth and less surface sensitivity. The dial that dictates the depth on this machine shows that. The more I crank the 'depth' dial to the right it in turn lowers the frequency( no indication of it, you just have to know what is going on) and increases depth of penetration.
I can only presume that the preset arrow on the depth is the point where you have a good balance of depth and sensitivity... However the depth at that mark gives off the same signal at the 4" as did the 6" but it was able to get the surface coin perfectly.
Learn your machine before you bash something that could have some potential, I would suggest, not recommend this for a beginner since there are more MDs out there that are easier to use. If you do obtain a pred III, get rid of the concentric coil and pick up a good DD coil. I am putting 5" as max depth, because once again, I feel that 5" is this machine's maximum EFFECTIVE depth.
Max Depth: 5 inches on US quarter
Ease of Use
Would you recommend this to a new user? No, not really.
Jeffrey from Spangdahlem, Germany
Had one/traded up
Idahogold from Idaho
Mitch from USA
Wiley from USA
Joey from USA