GT depth in full disc.

[gear box]

What type of depth could I expect in full disc? I ask because so many people mention the learning curve on the GT. I want to be out looking for the deep thing's, but I don't
want to hinder the ability of the machine to reach a reasonable deep depth and at the same time I want to make the learning curve as easy on me as I can. I hope this makes sense. I'm considering the GT as a replacement for my xlt,which I'm not sure is that deep of a machine. Any examples of find's and depth's would be appreciated. Thank's and good hunting.

 

[Bling]

i have used the GT with the WOT 15" coil and i like the S12 much better....just as deep and much lighter. with the S12 iv dug dimes @15" and with the S8 dimes @ 10"...i don't use any discrim at all i leave it @1 and dig by the tones.the smallest item iv found is a copper BB @ 4". but not as well on small gold like ear ring backs.myself i don't see any diff in depth with disc on or off. you just eliminate more items as you increase disc.

 

[Art (NWOH)]

Discrimination has no effect on depth. Sovs use audio discrimination........they simply turn off the audio to reject a target. All signals that are recieved are still processed and identified by threshold pitch and meter reading. Only those signals that are above the reject level will have the target audio turned on.
I have a White's that works the same way......except that it is a silent threshold machine. Target zones that are selected "ON" give target audio. Zones that are selected "OFF" give no audio, but the target ID and the target intensity graph still identify targets that are rejected. Does not matter how many zones are turned on or off, still has the same depth.
This is not like the Bounty Hunter in the back of the closet "somewhere?". When you turn up the discrimination, the signals are no longer processed at all. Progressively increasing discrimination will progressively cut into the depth. It's a different kind of discrimination setup.

I will not bother telling you about finds and depth. It depends too much on location, ground conditions, noise, trash, coil being used, and how you have the detector set up.

HH

 

[JHM]

I wasn't aware that it worked that way. More discrimination will cause it to null more. Will it get a deep coin while the threshold is nulled?

 

[Art (NWOH)]

It will have only a little trouble getting through the null if the null is a non-ferrous....the nulls are shorter and not as hard as with iron. A hard iron null is hard to get through . You will also have the problem of targets that are averaging to a value that does not represent any of the individual targets. In a case like this the target you want to find (along with some of the others) may be accepted or rejected depending on what the average value comes out to be. This is a case when listening for something that does not sound right will prompt additional investigation. If the whole works is disc out, you would never check it out. .... good case for not using much or any disc.

There is always another reason not to use much disc.......a weak hit will not always read the proper ID value on the first pass, but must be teased up with repeated passes or the "wiggle". In this case you would never hear it, or give it a second look because it could be disc out.
Some of these weak hits can be pretty low on the initial pass. You always want to take the time if it is practical to take another pass to see if the tone jumps. If it does, then check it out good.

Then there are threshold tone changes cause by very weak hits that do not produce target audio. They may be difficult to distinguish from a null and threshold change caused by a rejected target.

A personal dislike.....partially rejected targets produce sounds that I find irritating. Strange that partial target rejection sounds on my White's do not bother me at all.

HH

 

[Maxwedge]

Leave your discrimination down all the way and it will ignore the iron, but pick up all other metals. Be patient and study the sounds and meter readings.