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My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: jayhop
Date: January 27, 2018 12:29AM
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.

Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: IDXMonster
Date: January 27, 2018 05:53AM
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...

Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: Ben Town
Date: January 27, 2018 08:40AM
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

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Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: C&RHunter
Date: January 27, 2018 11:01AM
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



Edited 1 time(s). Last edit at 01/27/2018 11:05AM by C&RHunter.

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Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: Champ Ferguson
Date: January 27, 2018 01:23PM
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.



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Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: jayhop
Date: January 27, 2018 01:52PM
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.

Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: IDXMonster
Date: January 27, 2018 09:50PM
Quote
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.

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.

Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: laplander
Date: January 28, 2018 06:58PM
While your at it try a silver round :confused:
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 :shrug:
hh Jeff

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Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: JoeinMemphis
Date: January 29, 2018 07:55AM
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.



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Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: jayhop
Date: January 29, 2018 08:51AM
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.



Edited 1 time(s). Last edit at 01/29/2018 09:03AM by jayhop.

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Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: Jason in Enid
Date: January 29, 2018 11:18AM
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.

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Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: sgoss66
Date: January 29, 2018 11:27AM
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



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Lesche 38D Ground Shark "King of Spades"

Norman, OK

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Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: jayhop
Date: January 29, 2018 11:45AM
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.

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Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: sgoss66
Date: January 29, 2018 12:08PM
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



Minelab CTX 3030
Minelab Equinox 800
Garrett ProPointer AT
Lesche hand digger
Lesche 38D Ground Shark "King of Spades"

Norman, OK

Re: My ctx wont detect a silver dollar with discrimination on number 1 line
Posted by: IDXMonster
Date: January 29, 2018 12:15PM
Quote
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

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

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