A New Design Based on an Old Idea

[mustefa ubram]

Hello everyone. After being away for a long time, I’ve finally returned to the world of long-range metal detectors and electronics, and I truly missed all of my dear friends here.

After coming back, I decided to focus on developing a new detector system. If any friends are interested, I would be happy for us to exchange information and collaborate on improving this type of detector together.

Many years ago, a design from our dear friend Geo was posted on this forum — if I’m not mistaken, it was around 2012. I liked the operating concept of that type of detector and became interested in working on similar systems.

I have attached an image to this post that shows the general idea of the design I have in mind.

Have any of you had experience working with detectors of this type? Is the operating principle of these detectors reliable and acceptable? And do you think such designs are worth further development?

I would also like to kindly ask our dear friend Geo, if he has any experience in this field, to share his knowledge and experiences with us.
Geo

Thank you all in advance for your cooperation and support.

[Mike(Mont)]

It looks better than just running one wire to the antenna.

Quite a while back I hooked up a frequency generator to a Fred Stewart Sapphire directional locator rod. It came with a power pack that charged the person. I measured about one ohm so I assume it was a coil inside the handle. I don’t recall it working all that well but since then I have learned it’s best to walk in an “S” pattern to get a better response on the target, but I haven’t tried this technique. So maybe I will try this and see what happens. It’s not going to be exactly the same as your set-up.

Or another option is to use two L-rods, one connected to the positive and one to the negative.

[mustefa ubram]

It looks better than just running one wire to the antenna.

Quite a while back I hooked up a frequency generator to a Fred Stewart Sapphire directional locator rod. It came with a power pack that charged the person. I measured about one ohm so I assume it was a coil inside the handle. I don’t recall it working all that well but since then I have learned it’s best to walk in an “S” pattern to get a better response on the target, but I haven’t tried this technique. So maybe I will try this and see what happens. It’s not going to be exactly the same as your set-up.

Or another option is to use two L-rods, one connected to the positive and one to the negative.

Thank you very much for your response, my dear friend.
Could you explain a bit about the power pack and how it “charges” the human body? I’m very curious about the operating principle behind it, because honestly I find the concept quite fascinating.

[Mike(Mont)]

It’s not much, just a 6 volt battery that runs a small current through a coil (I think) inside the handle. The info said it helped older people or on cold days. After a while you can turn it off. Some days I could feel a difference when aimed at or near the target. I can usually get a tingle in my left hand and the power pack enhances that.

I’ve seen other similar devices. One just had the negative pole of a nine volt battery connected to the rod. Or if two rods the positive to the left rod and negative to the right rod. If you have any broken skin it gives a painful shock. Some have a variable resistor so you can adjust the power.

[Mike(Mont)]

You probably know the Electroscope uses voltage discrimination. I forget now but something like 0,9 volts for gold and 1.5 volts for silver.

[Mike(Mont)]

I should point out that voltage discrimination is probably the least accurate form. Especially now in modern times it is so easy and cheap to buy a DDS frequency generator. Many of them use 5 volts so it’s easy to use a cellphone power bank to power them, but you need to get the right one. Many of the expensive models have electronics that need precise current requirements and they will shut down if you try to power a DDS.

[Mike(Mont)]

I use something like this but these are old and might not charge. If you hook up a different power bank and it shuts off after a few seconds you know got the wrong type. https://www.ebay.com/itm/332205464778?_skw=waterproof+power+bank&itmmeta=01 KSWPR3W277BF190D7BAZHVBQ&hash=item4d58fd1cca%3Ag%3 Amr8AAeSwoNppj9dO&itmprp=enc%3AAQALAAAA8GfYFPkwiKC W4ZNSs2u11xBuaIB%2BTPySd6jUVIA6BHrYXHGxKQhbHmBTyGs 6KhHNIENFuH1jcTqqCdv%2B7tAg3wZ%2BYIC6lue2ho%2FEkD8 LNCAO2HWZ2SjwpKhMsZx0UVZYvIEvyyBOjM4oLpaJoD881XAKY Ez8%2FdREo57u6Cgr%2FNw3dgktpqG0m6odrPlHHMaMiDAWH1Y yQ4eCczJe%2FgbYtDctS8Is4v5CRv1zPy09OZ90KLDPQxLiXEc ISlDh8TCuQH6y2ZYZP86tpxYZqxol3CScx6AO%2FZLp%2FwXYi zcOKVc73rYrz5L88gJzJLMjJDFvWw%3D%3D%7Ctkp%3ABk9SR7 C-4JbPZw&keyword=waterproof+power+bank&sacat=0&relat edSearch=true

[mustefa ubram]

Thank you for following and contributing to this discussion.

Personally, I do not believe in applying voltage directly to the brass rods. In my opinion, inductively coupling a signal to the antenna through a coil is far more effective than feeding a DC signal directly into the antenna.

The idea of using the antenna itself as the core of a coil seems much more interesting and appealing than other conventional designs. I believe this approach deserves further investigation and experimentation.

[mustefa ubram]

Another fascinating idea that I am very interested in is the use of a ferrite-core frequency oscillator that begins to rotate when it reaches a point where a metal object is buried underground.

The concept is quite intriguing, and I would be interested to know whether anyone has experimented with such a system or investigated the physical principles behind this type of response.
The only part I do not fully understand is the reason behind the rotation. Could anyone explain what causes this movement?

Is it possible that the device begins to rotate when it reaches a point where the resonant frequency of the buried metal object matches the resonant frequency of the oscillator? In other words, could resonance between the target and the oscillator be responsible for the observed rotation of the device?

[Mike(Mont)]

Yes, and also the coil
magnifies the signal more than just directly attaching it to the antenna.

since we are on this topic I have seen dowsing rods with no electronics that have a coil with one lead directly connected to the antenna. I think the idea is to create a longer antenna. Some people say there is an acoustic wavelength and this is much shorter.

Tim Williams has done some work on acoustic wavelengths. What he found was the wavelengths were very close to the Earth Field NMR frequencies. It would be easy to wind a coil to these lengths.

https://youtu.be/TW6aGEpPqck?si=2W7NxfjdTIUbTPpR

[Mike(Mont)]

If you scroll down to post #29 Tip #26 I explain how to calculate the earth field nmr frequencies. If you divide the speed of sound by the frequency you get the wavelength. Speed of sound is about 1100 feet per second or I think 343 meters per second.

So example if the gold frequency is 39 Hz you divide it into 1100 to get a wavelength of 29.2 feet or metric 8.79 meters but you have to do your own calculations for the magnetic field strength in your area. There are many cell phone apps for magnetometer or you can get an estimate from the website.