Xtrem Hunter

[Skippy]

"There is one two-box project out there ( 1980's magazine ? )"
It was the Wait & Harrison / ETI566 magazine project:
https://www.geotech1.com/cgi-bin/pag...eker/index.dat

[ivconic]

[pito]

I am going to build similar the coils are ready.

[Riss]

Thanks Ivconic , but at first glance it appears that this detector is useless . here are some features :
http://kraftpuls.ru/pages/mg17.html
This direct digital processing made it possible to obtain high stability and black-color selection. The rate at which currents decay in metal depends on many factors. First of all, on the conductivity of the metal and on its shape and thickness.This is used to cut off small objects, since the current in them fades out much faster than in large ones. Therefore, the reception was made with a delay in order to cut off the metal fines.
Depth and stability of detection is achieved through pulsed search technology and coil separation.
There is also ground balance and slow auto-adjustment, this allows you to get rid of interference during search, which is typical for the static mode.
This is a very easy-to-use device, based on the “plug and go” principle. It does not require adjustments during operation, but if necessary, you can change the threshold and volume. It is not afraid of the frame catching on bushes, that is, there are no false alarms from snags, especially when walking.
Detection depth of some objects:
German helmet M-35 2.0 m
Copper plate 200x200x0.5 mm 1.7 m Passenger car 5.3 m Steel rod diameter 25x500 mm 1.3 m These results are for a standard air test in the field (there is no point in testing indoors due to interference).
The cost of one set of MG-17 is 80,000 rubles

[Riss]

"There is one two-box project out there ( 1980's magazine ? )"
It was the Wait & Harrison / ETI566 magazine project:
https://www.geotech1.com/cgi-bin/pag...eker/index.dat

Thanks Skippy - this detector is nerve-wracking . In 43 years not a single deep search detector which I would buy … or they don't know how to do it , or they don't want to do it . For me the second one is true …

[Riss]

Working conditions In territories-former colonies of the Roman Empire, there are - iron slag - heavy, adheres well to a magnet and light slag, which has a much weaker reactive component than the heavy one. Ceramics - bricks from floor heating, building bricks and pieces of ceramic vessels. With a pulse induction frame, large clusters of bricks were found at a depth of more than 1 meter. presence of randomly scattered hot rocks (but not in all settlements - usually there are always in fortresses). The conductivity of the soil changes in a very large range, the reason is organic pollution from ancient times - urine, remains of coal, burnt buildings... Sometimes the detectors register the targets in the soil at twice less distance than in the air! - the active losses in the soil are very large. The presence of a spot of scattered stones (often of limestone) are an indication of an ancient building. Usually the cultural layer is about 60 cm (second-first century BC), but in some areas, near the Danube river (due to floods and due to frequent attacks of migrating tribes) the cultural layer is more than 2 meters deep (there are also data on more than 6 meters, but these are exceptions). https://en.wikipedia.org/wiki/Ratiaria - the cultural layer was more than 3 meters deep. In addition to the tons of coins, many statuettes were also found, some of which are very expensive. I also heard about a Roman legionary eagle being found - the flag of the legion, its price is cosmic... Many times small ceramic vessels with coins from the first century BC have been found - they are an extreme challenge for detectors... the largest find that I know of is an almost full cart for construction purposes with Roman denarii ... https://www.made-in-china.com/produc...tion_Cart.html ; https://www.alamy.com/stock-photo-di...143021558.html

[filos]

take GPX and 24" mono or concentric from your neighbors.

[Riss]

take GPX and 24" mono or concentric from your neighbors.

Have you worked with what you recommend for the conditions I described? I failed to say that in a volume of 0.5 cubic meters - 1 square meter at a depth of 50 cm there are sometimes an average of 4 - 30 targets (or more), of which a few pieces of slag randomly scattered in this volume .The deep search detector must be statistically oriented to the likely targets in these conditions. to be able to ignore the small coins, small pieces of slag, ceramics and bricks. to work in conditions of varying soil conductivity over a wide range.

[filos]

GPX does not see slag and ceramics, and if you lift it a little, even the smallest thing passes without being seen. 24".. A concentric coil is even better, you switch to DD and it detects iron well. I’ve been working with this device for the last few years. I’ll try to space the coils on gpx, but I just need to make an adapter for the cable.

[Riss]

Do it...I'm afraid that if I take you to work with your GPX on any of the above-described terrains, on which I have many years of practice, you will radically change your worldview, you will reach complete despair. It is possible to throw your GPX into the nearby thorns...

[filos]

мы недалеко друг от друга. мы имеем то же самое. Лучшего устройства для такой почвы на сегодняшний день не существует. Думаю, у меня столько же практики, сколько и у тебя. Вам просто нужно терпение и научиться разбираться в устройстве. У меня еще много устройств, каждое делает свою работу. Позвоните мне и я покажу вам (Рысь), как я работаю с gpx.

[Carl-NC]

Please post in English, thanks.

[filos]

Carl. Please delete all my writings in this topic.

[Riss]

Yes, but it has long been possible to produce a deep-search detector that works well under these conditions. true, its construction should be complicated. there are many potential customers (who know what they need) who would pay a lot of money.

[Orbit]

Sd 2000 coil 50cm