To discriminate or not

[jayhop]

I have only owned a ctx for three months. In that time I feel that I have learned a lot but one thing I haven't determined is whether it is better to use discrimination or not when in the combined mode. Can you detect a good target through the iron grunts better than when the machine is nulling because of discrimination?
My thought is hunting wide open is better but would be interested in opinions from others with more experience.
Thanks

 

[amberjack]

physics would say an open screen or as open as possible after all its the advantage a CTX has over an etrac so for me I use an open screen in combined mode.

AJ

 

[Dan(NM)]

I run as wide as I can depending on the place that I'm hunting and I use combined modes as well. I have the pitch on my iron set very low so there's no doubt about it.

 

[Agseeker]

jayhop,

I use a slightly modified Coins Mode (Mode 1), with combined, and ground-coin (or ferrous-coin) and have no trouble finding coins mixed with iron.

 

[JamesBondaka]

It all depends on how many targets you want to dig....that's what discrimination is all about. It up to you what you want to weed out....or at least try to.

 

[CT Todd]

Not

 

[sube]

What Todd said I have tested with disc and without with screen 1 you have to crawl to hear and have to be dead on that high tone with open screen 2 is very forgiving much bigger window and don't have to be dead on and sweep speed is not as critical as screen 1 . Also what amberjack said the main advantage of the ctx is you can run open screen . sube

 

[trojdor]

Here's what I've found (YMMV);

Running with discrimination is SUPPOSED to make life easier by not pickup up the targets you'd prefer not to dig, and only sound off on the good stuff.

In reality, many bad targets...especially iron and/or big trash...will give a false signal at each edge of the bad target with a null in the middle.

You can easily be fooled into thinking that edge false is a good signal, and waste time chasing it down. (Thus losing whatever time/effort you're trying to save.)

Additionally, If you're hunting in a trashy area, you'll quickly have 'fruit salad' audio from multiple edge falsing.

In those cases, it's actually simpler on your ears to run no disc so that you can clearly hear the 'real' single tone on each target.

If you go one set further, and hunt in pinpoint trace, you can then hear the size and shape of the target as well....(but that's an 'acquired' taste/skill...not for beginners, nor the faint of heart)

good luck and hh,
mike

 

[sube]

trojdor very true of what you said a lot easier to hear that high tone without all that grunting going on with a little bit of disc. But you still will get that false even with that disc it's a high tone that's falsing but that little bit of disc just to nock out nails sure makes it easier to here that high tone .


trojdor said Additionally, If you're hunting in a trashy area, you'll quickly have 'fruit salad' audio from multiple edge falsing . so true . sube

 

[jayhop]

Thanks for the replies . I will run wide open as much as possible and set the ferrous line at about 24 and a tone of 75.
It would really be nice if they would make it where you weren't discriminating but that certain zones were silent.

 

[CT Todd]

Thanks for the replies . I will run wide open as much as possible and set the ferrous line at about 24 and a tone of 75.
It would really be nice if they would make it where you weren't discriminating but that certain zones were silent.

Ha
They don't make that but Deus does

 

[AngerManagement]

Thanks for the replies . I will run wide open as much as possible and set the ferrous line at about 24 and a tone of 75.
It would really be nice if they would make it where you weren't discriminating but that certain zones were silent.

Easy - sort of. Set the frequency of the selected zone in your profile as low as possible.

When I am targeting a particular coin here in Australia - I set all in the combined mode to low and then the one small zone I want = A nice tone

May not be ideal, but workable.

 

[IDXMonster]

In my area I find the Stock Silver mode to be incredibly useful. In Manual 21-25 with the stock coil it has no problem finding Mercs at 9" with a good,narrow repeatable 12-42/43/44. But the open screen is where it's at if you are hunting other things too,I much prefer hearing true signals like I do running the Explorer2 wide open in Ferrous. I haven't found it's AS needed with the CTX in mild trash because of improved processing speed. The CTX overall is an absolute PLEASURE to run,like a fine Cadillac with a smooth supercharged engine. I understand that it's cost prohibitive to some,but if detecting is your passion and finding high conductors is your thing,you'll want to aim to own one. I've had mine less than 2 months and there's NO WAY I'd ever sell it for any reason PERIOD. Fabulous piece of engineering,stem to stern.

 

[amberjack]

I would like to have the choice of what response type I can set for each box in combined mode. sure that's not a long bow for the tech guys.

AJ

 

[unearth]

So, if I understand this thread about disc/no disc, there's less falsing with an open screen than with a discriminated screen? Then, with no disc, or very little, you hear every sound of what's under the coil. Is this correct?

 

[Spud GA]

Most of the time I hunt with no discrimination and am able to pull out good signals between the iron, if I run just a slight amount of discrimination it tends to "blur" the good signal enough to make you want to pass it up for falsing!

 

[jayhop]

I guess it would be simple enough to do some above ground test. I will try some soon and post the results.
What I was wondering is while the machine is nulling from an rejected target will it report a good tone if it passes over an accepted one.Im sure it will depend on how large the rejected target is and how close the good target is to it.

 

[jayhop]

I know this was only an above ground test but:
I put a quarter and a piece of artillery shell fragment side by side almost touching on top of a plastic storage box. The shell fragment was just a little larger than the quarter.
I tried 50 tones and combined with the same results. The discrimination pattern was a tadpole with the ferrous set at 25 and lower.
With the two targets oriented north and south there was no audio signal when discrimination was used, but there was a visual for the quarter. The result were the same with the screen wide open.
With the targets oriented east and west and no discrimination (in combine mode) the quarter was coming through loud and clear at the same time so we're the iron grunts tones.
And to answer my own question : with discrimination, the quarter was screaming.
I will try latter with larger piece of iron but in this case a good target will sound off through the nulling.

 

[kreagerm]

I run an open screen until my ears get tired of all the low tones, I also run in combined mode.

 

[IDXMonster]

Unearth....that is correct. That is why most guys who have been at this awhile will use very little discrimination,they want to hear,for sure,what's under the coil and let the experience of their ears make the decision about whether or not to dig it up. To some degree,an old guy with an old detector he's had forever will trounce a new guy with a new machine. Now,there is a point at which technology will get the new guy further. Put the new tech in the old guys hands for awhile and you will see something spectacular happen regarding coin recovery in general....