By Nuke em
Anyone out there know any information on this machine ? It supposed to be being tested and could be really interesting when released .
May be able to discriminate Iron out .
You Tube this . AQUAMANTA A1 TESTS HARDELOT . All in capitals .
It is compared to the Sovereign and CTX , the Aqua is the last one tested . Unfortunately LIKE the Equinox most of the time before release , its in a foreign language .
By Mike Hillis
Hunting tiny gold jewelry in inland sites is just so different from mainstream detecting methods that unless you do it you don't understand the requirements.
#1. EMI stability. Your detector has to be stone cold stable. No spurious noise. None. The signals you are after are small tight signals and you can’t hear them if your detector is making spurious noises.
#2. The detector needs to be able to keep its HOTs at low gain/sensitivity settings because:
a... You need to be able to focus on the right depth of signals and those tiny signals are not deep. Most of the time they are just down in the grass roots. You want to focus only on the top three to four inches of depth. If you have to run your sensitivity at or near max all you are doing is masking the desired signal response with reports from all the other signals surrounding it and below it. And in cases where the ground minerals are high, the ground itself will mask the response.
b... You need to control the coil foot print. In this type of hunting you don’t want coil edge surface responses. You only want to hear what is directly under your coil. Concentric coils work better at this than DD coils. DD coils are ok but you get better footprints with concentric and tighter readings on your meter.
#3. The higher the operating frequency, the more important the above become. As the operating frequency goes up, the level of discrimination goes down because the trash targets hit harder and sound better. In other words, the higher the operating frequency the better the trash sounds and responds.
#4. Notch discrimination or some other form of discrimination that will allow you to focus just on the signal range you are hunting. The only range of signals you are interested in are in the ferrous/non-ferrous boundary range and the foil range up to maybe the nickel reading. All other signals are distractions.
I'm editing to add a number #5. Tiny signal audio boost is a big plus if it can be deployed while keeping original signal response integrity.
I'll close with this.....You can take a gold prospecting unit onto a woodchip playground or a sand pit and as long as it can handle the EMI you can hunt with it on normal settings. But if you are targeting sites where good quality, tiny jewelry is most likely to be present, you will be working a lot of turf sites where a prospecting detector's normal feature set isn't going to be very helpful.
By Randy Dee
This post is mainly directed to UK field detecting where we have had social open air gatherings since Medieval times and on fields littered with coke. I used these settings yesterday and I was hopeful of finding at least one gold necklace / chain but alas none, better luck next time.
As most of us know it is almost impossible to find a fine gold chain with any metal detector and as it is a long story why but mainly due to Eddy Currents and the metal detector rejecting coke which fits into the same frequency range as thin and fine gold and as here in the UK we find our permission fields littered with coke which mostly emanates from the days of steam engines powering farm equipment and the spreading of night soil as a crop fertilizer and which was collected from house middens and where the ashes from the household coal fires was used to cover the stinking human excrement, these ashes contained large cinders which survive for donkeys years in the soil and give off wonderful signals for metal detectors.
This information on how to adjust the Tone Breaks to enhance the chances of finding gold chains during field detecting is only applicable to the Minelab Equinox 800 as it has the advanced settings capability.
To alter the "Tone Breaks" it involves making changes to three "Target Tone Dependencies" which are "Number Of Target Tones", "Target Pitch" & "Target Volume".
Here is my effort to change the settings to cover the frequency conductive range to give off a signal from thin gold chains in the discrimination zones, at present the default Discrimination zone is -9 to +2 and it is the Zero to +2 segment where gold chains show.
So first of all select either "Field 1 or 2" your choice.
Then go to "Target Tone" choose 5 tones.
Then go to "Tone Breaks" and set the 5 tones as thus T1 = -9 to 0, T2 = 1 to 2, T3 = 3 to 28, T4 = 29 to 38, T5 = 39 to 40.
Then go back to "Tone Volume" and set tone segments to T1 = 1, T2 = 15, T3 = 25, T4 = 25, T5 = 15.
Then go to "Tone Pitch" and set the tone segments to T1 = 1, T2 = 15, T3 = 25, T4 = 20, T5 = 16.
To move from from one tone segment to the next segment use the "Accept / Reject" button ( \//x ). These settings are working for me but then again they may not be every-bodies cup of tea.
Well today was beach hunt #7 with the Equinox. There wasn’t a lot of detecting room, with the way the tide was today. Also, a lot of people walking and laying out on the beach. It’s getting crowded out there. I was hoping to keep the streak alive today and I didn’t have to wait very long. First good target was the pink stone 14 K Gold ring. I almost didn’t believe it. That made the rest of the hunt less stressful and more enjoyable, as the gold streak would continue. But I didn’t expect to get too much more, but the finds kept coming. All the time I just kept shaking my head, I can’t believe what Minelab has done!!! 4 gold rings, some silver and a small amount of clad. The broken class ring was found in 2 separate holes about 60 ft apart. The breaking points match up perfectly…they were part of the same ring. The tiny targets were out in full force, as well as the pull tabs too. A small price to pay for the good finds that can come with it. Probably the smallest chain this machine can pick up. Had a hard time locating it once it was out of the hole. I was glad to get out today… a picture-perfect weather day!