Hi kahyal,
I can see you are a believer that a locator that detects metals will work long range when you put it in a pistol.
Maybe this is true and maybe no.
I see many people make pistols that will detect metal, but they have problems for finding long range.
I know of a circuit schematic for a detector of metals that works by transmitting VLF radio signals very far away from the pistol, then uses a receiver coil to listen for some changes in the signal that is being received.
This locator is so sensitive that it must use a nulling adjustment as well as a sensitivity control for finding signals that can originate in very distant locations.
This circuit was designed by some top electronic engineers in the USA many years ago, but it was forgotten.
What most people do not understand is this locator does not use integrated circuits which filter out the tiny signals that modern designs cannot find.
But LRL experimenters know better.
They know how important these tiny signals are for locating treasure.
They know these signals are lost when they use modern components.
This is why so many LRL experimenters look for this circuit.
I have seen many different versions of this circuit with different transistors and components ... and they do not work for most people who build it.
Maybe this is because they do not use the correct methods for building their PD.
Or... maybe it is because they do not have the correct schematic version.
I hear rumors that the pistol has a difficult time to work when the parts are changed for modern parts.
But I have the original circuit design using the original transistors and all the original components.
Some years ago I read that one of the Geotech engineers has this original locator design made into the pistol project.
He did not build a copy using modern parts.
He has the original locator from 30 years ago which he modified into a PD without changing any components.
He never will tell how much treasure he found.
I am thinking he found many ancient hammered coins, but I do not think he will tell if he found some Celtic gold treasures.
I don't know for certain because he did not say what he recovered or not recovered.
But I remember he said he received some very strange signals that he never received from any of his metal detectors.
Then he became silent.
We never again heard about any more treasures he found...
I can only guess he spends his spare time treasure hunting using his original version PD locator.
Maybe he wants to keep the original design as a secret so only he can use it.
But I will tell all details...!!
http://www.geotech1.com/forums/images/smilies/good.gif
You can look below for a complete schematic.
Nothing is missing. It shows all the original parts that you will see if you open the locator and look on the circuit boards.
There are very few of these original locators left in the world.
People buy them as soon as they are listed for sale, so you will not be able to find one.
But you can build a copy from the original parts, because I show everything below.
Note: one transistor is no longer manufactured, so I put the substitute transistors that you can use to get the same results.
Also, you will need to find a mica capacitor. You can find these on ebay.
Good luck with your PD that detectors metals :)
J_P
