Uncle Willy - can you explain how imaging works on the GTI?

[blake_mulder]

I would really like to know how the imaging on my GTI1500 actually works - how about this - I scan an object left to right and imaging says "C" size, then I size up and down, imaging recalculates to a "B" size, and low and behold I dig up a coin - it is just amazing how this "old" technology works - can anyone shed light on the science behind this?

 

[Uncle Willy]

That technology ain't that old. I first field tested the 1500 back in the late ninties. I have explained what you experienced many times. The imaging coil is unlike other coils as it has three coils inside - one transmitter and two receivers. One receiver ( the center hole in the coil ) is devoted entirely to sizing the object in the ground and displaying the approximate size on the imaging grid. With any GTI centering the target correctly is absolutely crucial for accurate readings, which explains your experiece. If you're off center just a fraction you will get a different reading but when you get it centered correctly then the true target is displayed and sized. You can't get sloppy with these coils..

I explained this trick earlier. Often the GTI's will ID a quarter as a penny but if you pinpoint it and move the coil around just a bit at a time the reading will often change from penny to quarter. That's how sensitive the GTI imaging coils are.

Bill

 

[dahut]

- or must very nearly be. Too fast or too slow and the analysis gets 'monked' up, as well.

 

[metalhead]

Man, that GTI (2500) is a wonderful creation.Over ten years on and it's still the best IMHO (for the price) Happy Hunting!

 

[Uncle Willy]

Yeah it's a choice piece of machinery.

Bill

 

[Uncle Willy]

Yeah it's a finicky machine. Some folks who have hunted for years with another brand get ahold of a 2500 and try to use it like they did their former brand and immediately run into all kinds of problems. As I used to tell them on the classroom years back - you can't hunt with a GTI like you hunted with your old machine or you're going to have problems .It's a breed all its own and has to be treated as such.

Bill

 

[ojm bc]

n/t

 

[dahut]

Yeah it's a finicky machine. Some folks who have hunted for years with another brand get ahold of a 2500 and try to use it like they did their former brand and immediately run into all kinds of problems. As I used to tell them on the classroom years back - you can't hunt with a GTI like you hunted with your old machine or you're going to have problems .It's a breed all its own and has to be treated as such.

Bill

I remember you telling ME that, over a decade ago. It is true - you must let the Garretts teach you and toss your preconceived ideas. The good thing about that is it opens your mind to new things.

Very good point, Bill.