GTI 2500 having problems

[WestTn]

Went hunting with the Father in Law this weekend and his GTI 2500 was having the following problem: Whenever he would hear a good target tone, he would go back over the area and couldn't find the target. Tried adjusting the sensitivity, tried Salt Elimination, Full Metal Mode, you name it, but the same problem over and over.
Anyone familiar with this sort of strange behavior from a 2500? Ground was fairly mineralized, sometimes clay, sometimes sand, but just a variety of textured soils in Alabama.

 

[fongu]

Was he using a coil cover? If not, some of the vets will have to answer this question. I'm just a rookie myself. Sometimes the 2500 will pick up something from several feet away. Did he scan the target east to west and north to south to see if he could pick up the target? Was his coil connection to the housing tight? This interests me because I ran into an interference problem from power lines one time with my 2500 and and old rusted galvanized pipe another time.

 

[bearkat4160]

Sounds like a pocket of mineralized clay to me.

 

[Uncle Willy]

Was he scanning fast or slow? If you scan fast the 2500 will sometimes false on a junk taget that it will discriminate out when you go back over it slow. The GTI's aren't built for rapid scanning as they have too much information to process.

Bill

 

[Capt Bob]

Sometimes you may find a very small crack in the caulking on the bottom of the coil - this can cause all kinds of problems from moisture -- I had this problem and got a new coil from Garrett - problem solved - Bob