[J_Player]

Originally Posted by aft_72005

Hi J_Player


Are you know about absorption type PD ? and what happened when this PD
Seeing targets ?

Best regards

Hi aft,
Absorption type does not exist. This is only a word that Esteban chose to describe a low impedance passive coil detector that responds to noise and the alledged "phenomenon". It has never been demonstrated that there are any emissions, or that these passive coils are absorbing anything. The description of the response would suggest the coil and amplifier develop a signal when pointed in the direction of long range buried metals. Nothing more. According to Esteban, he concluded the coil is absorbing emissions from the "phenomenon" area of the ground near long-time buried metals.

Here are some references to show the origin of the terminology "absorptive detector":

Esteban explains the ways to detect the "phenomenon" produced by long-time buried metals: http://www.geotech1.com/forums/showp...1&postcount=81
No only gold (buried for many years) produces electrical changes in the vecinity of an electrode (Mineoro's electrode, in this case). Here occurs a disbalance of charges.
Also, the ELECTRICAL variation in a site with buried metal is detectable by a simple FM radio.
You can detect via this methods:
1. radio
2. coil (oscillator)
3. infrared
4. magnetic absorption
5. microvoltmeter
5. association between 2 or 3 the above
Continuous detection (reproducible in the air) maybe is not possible yet, because the involved phenomenon depends of the electrical field produced by the long time buried metals.

Esteban describes how absorption is accomplished with a ferrite in the pistol detector, while the metal detector part is for pinpointing at close range: http://www.geotech1.com/forums/showp...4&postcount=20
Pistol detector based on regular detector works as long range detector (some meters) and is possible in conjunction with other(s) circuit(s).
Morgan has success finding targets with it, I have success with similar instrument... so maybe the problem is errors in schematics or connections.
The ferrite section is the real long range detector in this project.

Pistols with MD can be:
1. Based in regular MD + RF circuit
2. Absorption as the ferrite, in wich case MD is for pinpointing unburied target.
And more and more combinations. Conclusion: an unexploded field with infinite possibilities.

Esteban explains why he calls the magnetic/electric detection "absorption" rather than response to an anomaly: http://www.geotech1.com/forums/showp...&postcount=127
J_P: From what you have posted, it appears that your machine is only showing different "beeping responses" when the target is removed, which has convinced you that your machine is absorbing emissions. However, I am not convinced. I do not believe there are any emissions from the "phenomenon" area except an increase in radionuclides for long time buried metals. And it also seems that your machine is not capable of counting radionuclides. Therefore, I speculate that you are detecting an anomaly of some sort, -- not emissions.
Esteban: I use "emission" because some very sensitive instrument that enlarge a short pulse 100,000,000 times show the target in wide angle, so is difficult to centrate due the anomaly. But the anomaly only is detectable or better detectable when target is buried for many years and near surface, 10-30 cm. When small target is very deeply maybe you obtain few detection or only a beep, except if the mass is a treasure.
I use "absorption" because I consider that a loop with a toroid can absorb some magnetic-electric anomaly around such targets

Esteban shows photos of a classic "absorption" ferrite sensor in an experimental LRL: http://www.geotech1.com/forums/showp...96&postcount=1

Esteban describes absorption of "phenomenon" with experimental magnetic device detected bronze that Mineoro could not find: http://www.geotech1.com/forums/showp...7&postcount=86

Esteban explains how absorption works to detect local magnetic and electric field using the pistol detector: http://www.geotech1.com/forums/showp...2&postcount=22
Qiaozhi: Are you attempting to detect differences in the local magnetic field or the electric field?
Esteban: The both. Devices based in magnetics (passive type, absorption mode) must be low impedance loop/low resistence coil for to no catch interferences and detect only non ferrous, but have not much distance, only few meters. Except based in magnetics type MD coils (active). Based in this same type but with many turns coil catch ferrous...
But based on electric field go more far (antenna, microvoltmeter type).
Qiaozhi: But your detector is a handheld pistol-type. How can this detect a potential difference in ths soil? Or is this using a different technique?
Esteban: Because, is the form for this kind of detector, is not equal in form that regular MD, except if there are an IB detector coil attached in a box with handle. Just this is the job of the electronic LRL: to detect the difference in the soil, and his more sensitive since you don't approach in the soil, so is free of effect soil and capacitance.

Esteban tells distances of detection when using different LRLs: http://www.geotech1.com/forums/showp...9&postcount=51
IR (infrared) + FM radio = 7 m in distance, depth for coin max. 50-70 cm.
Absorptive can catch 20 m or a little more, but depth is other theme. I think treasure at more 4 m depth can't be detectable at this distance (30 m), but in vecinity yes.

http://www.geotech1.com/forums/showp...76&postcount=4 IR + FM radio + magnetic absorption antenna = 25 m


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The concept of "absorption" means a low impedance coil usually on a ferrite is connected to a receiver/amplifier with an RF detector circuit, similar to an AM radio receiver. Whatever signal is received is passed through a threshold detector and made to beep when it becomes stronger than the threshold setting. This is called "absorptive detection".

Best wishes,
J_P