My ctx wont detect a silver dollar with discrimination on number 1 line

[jayhop]

I have been hunting with discrimination at the top of the screen down to about the 8 or 10 line. I've had my ctx for two years and I'm pretty sure I've checked my patterns with silver halfs and dollars before. I'm about ready to start hitting the fields again so I checked my patterns with all my coins this week. I really couldn't believe it when my machine would not sound off on a silver half. Then I tried the dollar and it wouldn't sound off either.
I know in High Trash and Low Trash separation you have to leave the 1-40 to 1-48 area open the detect large silver. All my programs except beach mode have Ferris /Coin separation. The target trace shows up in the 12-43 area but no sound with any discrimination on the 1 line in the 40 to 50 area.
I did a reset all and tried again. I still have the same problem. The detector will pickup the half and the dollar with no discrimination up top but it's supposed to pick them up with discrimination from 1 to 10 lines using ferrous coin separation.
I'll use as is for now with no discrimination up top and send it in to be checked out next fall.
If you are using discrimination at the top of your screen you my want to check to see if your machine has the same problem.

 

[IDXMonster]

Yep,same with the etrac as you probably know,even though it doesn’t have the FE/Coin option. The safe thing to do is exactly what you’re going to do...run that section open. You’d hate for someone else to come along and pick out a silver dollar behind you due to not sacrificing a bit of disc! At least you’ve identified the issue and know how to resolve it...

 

[Ben Town]

I noticed that right after I had some new programs loaded at a Bootcamp I attended last year.
I found that a friend and myself were detecting in an old 1800s picnic area and I found a couple V Nickels and he had a couple IH penny’s.
Don’t know why but I tried one of his IH and it did not hit on my detector, so I opened it it for that hunt and when I got home I bench tested and found that silver dollars and halves did not hit either.
I just opened up that area until it accepted the coins and all was good.
I have an assortment of most all the coins I’d expect to find and now whenever I make a change in Discrimanation or add a new program I always bench test thru all the coins just to make sure.
Now when the weather breaks I have some new old ground to run over again.
BT

 

[C&RHunter]

Attached is a link to a TID chart for the CTX, that may help. It shows how coins typically will register, depending on the search mode that you are using. The the US silver dollar and half dollars can read in two completely different locations on the screen, depending on the setting used. https://www.findmall.com/read.php?87,1731336

 

[Champ Ferguson]

This is a Real good example of why your should always use your own tested discrimination patterns and not just take the word of someone else. Treat internet and friend's/dealer's recommendations as just that, Recommendations.

 

[jayhop]

Thanks for the replies. The chart and the ctx handbook are what I'm looking at.
The reason for my post is to inform others of the problem so their machines can be checked.
There's something wrong with my detector, in low trash and high trash the silver dollar registers at 1.40 to 1.43 and that area can't be shaded in order to detect the dollar that the way it should be. But in ferrous coin and ground coin the dollar registers in the 12.42 to 12.45 area so the 1 to 10 lines should be able to be shaded. That's the problem, with just the 1 line discriminated in ferrous coin and ground coin none of my silver dollars are detected. And with the 1 to 10 lines discriminated the silver half will not be detected.

 

[IDXMonster]

Thanks for the replies. The chart and the ctx handbook are what I'm looking at.
The reason for my post is to inform others of the problem so their machines can be checked.
There's something wrong with my detector, in low trash and high trash the silver dollar registers at 1.40 to 1.43 and that area can't be shaded in order to detect the dollar that the way it should be. But in ferrous coin and ground coin the dollar registers in the 12.42 to 12.45 area so the 1 to 10 lines should be able to be shaded. That's the problem, with just the 1 line discriminated in ferrous coin and ground coin none of my silver dollars are detected. And with the 1 to 10 lines discriminated the silver half will not be detected.

You’ll see that Jay,if you think you have to send it in then that’s up to you. It’s just the way the system works and how the coins have been programmed into the machine. This is why it’s wise,as you’ve discovered,to have that area open at all times no matter the separation option chosen. This harkens back to the very beginnings of discussions about less discrimination getting more coins. It’s not that less disc gives you more depth,it’s that less disc allows more good hits to be heard,depending on the machine and how it works. When you have software operating as it does in the CTX,the leeway in this particular situation has to be given. Is it optimal at all times? Maybe not. But KNOWING you won’t miss any large silver is more important than being able to disc out what turns out to be a fairly small area.

 

[laplander]

While your at it try a silver round
Now you know why I hunt with a wide open screen with a low ferrous line, if you can't hear it how can you dig it
hh Jeff

 

[JoeinMemphis]

Mine has always done the same in either GC or FC so I've just opened up the top right and done my own bench testing to make sure it works.

 

[jayhop]

I really believe at one time mine would detect the large silver in ferrous coin with a tight discrimination pattern such as the one on page 114 of the handbook. I know for sure I've done the same test in the past with no problems. Something has changed.
There's no telling how many nice silver coins ctx users have left in the ground while using such a pattern.

 

[Jason in Enid]

The FE-CO response on silver dollars has been known since the beginning. This is why I always tell people to stop worry about someone elses "program", just learn your detector and create your own.

 

[sgoss66]

Jason,

I think the OP is saying something different though. He's saying, if I understand correctly, that in Ferrous Coin mode, his silver dollar is IDing, and "target tracing," at 12-43, but will only give an audio response (despite the IDing numerically in an "open" part of his pattern) if he has the 1 FE line open between 40 and 48 CO.

Having the 1 FE line discriminated, while the target is registering a VDI at 12-43, should NOT cause a "null" in the audio response for that 12-43 target, is what he is saying.

This is indeed rather mysterious...

Steve

 

[jayhop]

That's exactly correct. I have just done a serch for this situation and found other post that state the same problem from years ago. Looks like it's a know problem that I didn't know about.

 

[sgoss66]

jayhop --

I almost sounds to me like the "true" ID of a silver dollar is, say, 01-43 -- no matter WHAT separation setting you are using (FE-Coin, High Trash, whatever), but that in some separation settings the visual ID number is only "artificially" manipulated (in software) to show up on the 12 line. However, apparently, the discrimination, audio tone assignment, etc., happens within the machine BEFORE this "software adjustment" of the ID number, such that disc, and audio, is still cued off of the "01-43" ID (prior to the software adjustment). Just guessing on that, but it almost HAS to be what's happening...

Steve

 

[IDXMonster]

jayhop --

I almost sounds to me like the "true" ID of a silver dollar is, say, 01-43 -- no matter WHAT separation setting you are using (FE-Coin, High Trash, whatever), but that in some separation settings the visual ID number is only "artificially" manipulated (in software) to show up on the 12 line. However, apparently, the discrimination, audio tone assignment, etc., happens within the machine BEFORE this "software adjustment" of the ID number, such that disc, and audio, is still cued off of the "01-43" ID (prior to the software adjustment). Just guessing on that, but it almost HAS to be what's happening...

Steve

Awesome Steve! That’s JUST what I was going to say,whether it’s correct or not. But it makes COMPLETE sense.

 

[Jason in Enid]

Jason,

I think the OP is saying something different though. He's saying, if I understand correctly, that in Ferrous Coin mode, his silver dollar is IDing, and "target tracing," at 12-43, but will only give an audio response (despite the IDing numerically in an "open" part of his pattern) if he has the 1 FE line open between 40 and 48 CO.

Having the 1 FE line discriminated, while the target is registering a VDI at 12-43, should NOT cause a "null" in the audio response for that 12-43 target, is what he is saying.

This is indeed rather mysterious...

Steve

OK, thanks for clarifying. That is strange. I dug my last silver dollar in FE-Coin and it was on the 12 line and sounded off just fine.

Jayhop, have you tried a hard factory reset?

 

[sgoss66]

Jason --

Yours sounding off fine makes sense, though, as you (I am sure) had FE 1, CO 40-48ish open...

Steve

 

[jayhop]

Yes I did a Reset All, as the minelab tech recommend. Mine shows the dollars at 12.42 to 12.45 in ferrous coin also and will sound off if there is no discrimination on the 1.42 to 45 area.
But with that 1 line shaded out, no sound.

 

[jayhop]

I agree. Whether or not that's exactly what's happening or not thats the results.

 

[Jason in Enid]

Yeah, Steve, you're right... I'm pretty sure I had that top row open now that you mention it. I'm going to have to play with this some when I get home tomorrow. I want to see if I can re-create this on mine.