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GT signal on pulltab even at disc at 13
- Thread starter dan93
- Start date
Dan,most Sovereign users will adjust the discriminate and notch knobs to the lowest settings.Even in high thrash parks I'll run at these settings.With these low settings the Sovereign will not null as much and allow you to blend targets, ie see and hear the tones of coins mixed in the junk.HH Ron
Critterhunter
New member
Disc will not go all the way up to only silver or such. It's somewhere I think a bit below zinc pennies (which lowest being 173 for zincs). There are some tabs that will read into the zinc range but for me at my sites those are rarities. Typical for me 99.9% of all round and square tabs range from about 148 or 149 to 169. There's only one pesky old tab that comes to mind that will read up in the zinc range or perhaps a bit higher for me. It's a fat old school square tab, which I only find on occasion, and I think was one of the initial square tabs that came onto the market when transitioning between round and square tabs.
I never really checked to see just high disc will discriminate out targets, but I suspect it's right around or just below zincs. On no machines I ever owned would I use any discrimination, and I only use notch to block out a 12.5 digit spread on my GT on days I just can't put up with the constant machine gunning of tab signals when they are by the billions present at a site and it's destroying my concentration.
I sampled a random pool of numerous round and square tabs from numerous sites a friend and I hunted, and found that if I raised the notch to just barely block out a 165 tab #, it would then block out about 84% of all know tabs for me, while still sounding off to nickels (around 136 to usually 141 to 146 in VDI)...And we scanned in over 100 truly random gold rings and when we crunched the numbers you'd still recover the vast majority of gold rings by doing that.
On rare days I want to do that, when say going after gold rings or other targets while avoiding tabs without having to pay constant attention to the meter to check VDI #s, my nickel count will shoot through the roof, even though nickels have a distinct lower tone than tabs and a more "round" and "boing" sound to them. I'm more prone to stop and investigate a target's VDI or just dig it, when it sounds through with most tabs being silenced by the notch.
Just the same, the only time I really regularly used any form of discrimination on various prior machines, is when they lacked tone alerts, because it was a constant pain to have to watch the meter while I worked my way through trash. I especially relied on the discrimination dial with certain machines that lack both a meter and tone alerts, and even though they had a reputation for being very telling in audio, I never saw that for myself to judge target traits, no where near what I feel the GT's long detailed audio gives me, and the tone alerts make that even more potent.
There are guys that I've read of in the past that will go into "Silver Mode" on a Sovereign at a very trashy site, by cranking the discrimination all the way up and only digging what targets sound through. I've only done that a few select times, when I was in a hurry and the site was so loaded with junk (such as near parking lots) that I just didn't want to waste time ciphering out all the tones and hits.
One particular site comes to mind, where I was working the edge of a parking lot in heavy trash at a well pounded old park loaded with trash, and within about 20 minutes I dug several copper memorials among that trash that any self respecting old coin hunter should have dug hoping for a wheat or indian, or other good find, and even an old silver that can and will read a bit lower due to being worn, on edge, masked, mineralization, and so on.
Best thing to do is to in most cases use your ears as the discrimination dial. It lessons lag time of "rejection mode" and "acceptance mode" on any machine. It took me a long time to get used to iron nulling out on the GT since I never even discriminated that out with prior machines. I was worried it might cost me masked coins in iron, but now I see in numerous head to heads over two years that the GT will unmask coins in iron just as well as another flagship machine using very minimal bare bottom iron rejection settings.
Part of that is probably due to the 12x10 I'm using with it's razor sharp DD line, but also part of it I think is the wonders of Iron Mask ON on the BBS units, which seems to try very hard to sound off to any non-ferrous traits to a mixed "as one" signal, because even with the stock 10" Tornado, which is an excellent coil by the way, I was very impressed at how these GT would sniff coins right out of iron laying right with them in the hole...
I never really checked to see just high disc will discriminate out targets, but I suspect it's right around or just below zincs. On no machines I ever owned would I use any discrimination, and I only use notch to block out a 12.5 digit spread on my GT on days I just can't put up with the constant machine gunning of tab signals when they are by the billions present at a site and it's destroying my concentration.
I sampled a random pool of numerous round and square tabs from numerous sites a friend and I hunted, and found that if I raised the notch to just barely block out a 165 tab #, it would then block out about 84% of all know tabs for me, while still sounding off to nickels (around 136 to usually 141 to 146 in VDI)...And we scanned in over 100 truly random gold rings and when we crunched the numbers you'd still recover the vast majority of gold rings by doing that.
On rare days I want to do that, when say going after gold rings or other targets while avoiding tabs without having to pay constant attention to the meter to check VDI #s, my nickel count will shoot through the roof, even though nickels have a distinct lower tone than tabs and a more "round" and "boing" sound to them. I'm more prone to stop and investigate a target's VDI or just dig it, when it sounds through with most tabs being silenced by the notch.
Just the same, the only time I really regularly used any form of discrimination on various prior machines, is when they lacked tone alerts, because it was a constant pain to have to watch the meter while I worked my way through trash. I especially relied on the discrimination dial with certain machines that lack both a meter and tone alerts, and even though they had a reputation for being very telling in audio, I never saw that for myself to judge target traits, no where near what I feel the GT's long detailed audio gives me, and the tone alerts make that even more potent.
There are guys that I've read of in the past that will go into "Silver Mode" on a Sovereign at a very trashy site, by cranking the discrimination all the way up and only digging what targets sound through. I've only done that a few select times, when I was in a hurry and the site was so loaded with junk (such as near parking lots) that I just didn't want to waste time ciphering out all the tones and hits.
One particular site comes to mind, where I was working the edge of a parking lot in heavy trash at a well pounded old park loaded with trash, and within about 20 minutes I dug several copper memorials among that trash that any self respecting old coin hunter should have dug hoping for a wheat or indian, or other good find, and even an old silver that can and will read a bit lower due to being worn, on edge, masked, mineralization, and so on.
Best thing to do is to in most cases use your ears as the discrimination dial. It lessons lag time of "rejection mode" and "acceptance mode" on any machine. It took me a long time to get used to iron nulling out on the GT since I never even discriminated that out with prior machines. I was worried it might cost me masked coins in iron, but now I see in numerous head to heads over two years that the GT will unmask coins in iron just as well as another flagship machine using very minimal bare bottom iron rejection settings.
Part of that is probably due to the 12x10 I'm using with it's razor sharp DD line, but also part of it I think is the wonders of Iron Mask ON on the BBS units, which seems to try very hard to sound off to any non-ferrous traits to a mixed "as one" signal, because even with the stock 10" Tornado, which is an excellent coil by the way, I was very impressed at how these GT would sniff coins right out of iron laying right with them in the hole...
deepdiger60
New member
All the years i have a GT not once have i used notch and disc .knobs there a waist of time . GL Jim