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Offline CorneliusTopic starter
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« on: January 29, 2009, 01:40:38 pm »
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Click on 

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www.exploracja.cyberdusk.pl/pliki/sandbanks300pi.pdf
    and you will see the schematic for the Sandbank PI metal detector by P.J.Wales .  This is a simple detector which could be build by just about anybody . If you wanrt to build it let me know because the transformer T1 is very hard to be found , however you can do without it .  Transistors  Tr5 and Tr 6 have alternatives  .  Cornelius

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Offline Sauerkraut
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« Reply #1 on: January 29, 2009, 02:26:30 pm »
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Nice, but from 1979... 

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Geotech
has quite a few more Projects.
I am working on a "Microcontroller PI Treasure Hunter" (from 1994), also called "Stuart II".

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Offline CorneliusTopic starter
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« Reply #2 on: January 29, 2009, 02:33:38 pm »
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Geotech does not have their old forum any more . Carl was a hell of a guy and had a lot of good projects . I am far ahead of the simple PI detectors but I thought it would be a nice project for newcommers . Sorry if I offended you . Regards  Cornelius

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Offline Sauerkraut
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« Reply #3 on: January 29, 2009, 02:44:12 pm »
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Well, Geotech moved to

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http://www.geotech1.com
and Carl is still there  Smiley
If you are far ahead of the simple PI detectors - which is the best ?



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Offline CorneliusTopic starter
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« Reply #4 on: January 29, 2009, 02:52:01 pm »
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Sauerkraut , with some modifications the DBP 2010 is the best PI metal detector ( with discrimination ) I ever built . I built two units to try out the modifications . It is not a simple detector but certainly worth building it .   Coils are simple to make .   I have one Probe and three different size coils . The largest coil is 1 Meter  X 1 Meter . This large coil will detect a large metal object ( like a cannon ) at 20 Ft depth .  Regards  Cornelius

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« Reply #5 on: January 29, 2009, 03:05:38 pm »
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I didnt see this one yet, the Schematics and stuff are a bit rare.
20 ft sure is long Range, but i wont dig that deep anyway.
A Shovel wont be efficient for that.

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Offline CorneliusTopic starter
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« Reply #6 on: January 29, 2009, 03:14:53 pm »
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No  Sauerkraut nobody in his right mind would dig a hole 20Ft deep .  I certainly w?uld not ! . The reason this detector is helpfull is when you are searching for shipwrecks . A cannon may be quite deep under the sand  . That is the place I use the big coil . It has helped me in Florida in discovering a Spanish wreck .  Regards  Cornelius

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« Reply #7 on: January 29, 2009, 03:28:17 pm »
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I would dig about  that deep and no way it would be by hand ifsomething is that deep in a remote location you can bet it aint some guys wifes old  [detecting]stove   

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Offline CorneliusTopic starter
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« Reply #8 on: January 29, 2009, 03:37:51 pm »
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You are so right about that one  Outback . That is why you should never detect along the Oregon trail .  Cornelius

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« Reply #9 on: February 01, 2009, 02:02:00 pm »
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Hello Cornelius , right when I found out last week you became a Member of Thunting.com I knew you would become a "Tech-Moderator" .......Congratulations  Clapp Clapp Clapp...............Do not forget to mention the Cx and Rx capacitor modification you implemented in 2002 for the sandbanks !! ....... Wise Wise Wise......Regards............Eugene52

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