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Offline xavier
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« Reply #20 on: July 16, 2015, 12:11:03 pm »
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I'm sure that the DBP2010 would do the job and I know that it works. Don't know what you are looking for mate but I'd hate to have to dig them holes.

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« Reply #21 on: July 16, 2015, 03:46:34 pm »
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 Guess he is looking for 64lb Ingots of gold.

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« Reply #22 on: July 16, 2015, 08:50:53 pm »
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HOMZFIRE mybe more than 63 lb ,because a lot of places in my region  , and many rich civilisation passed on one region   Kiss

Posted on: July 16, 2015, 08:50:00 pm
where i can buy one

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« Reply #23 on: July 16, 2015, 09:14:41 pm »
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gOOgle should find it for you.

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« Reply #24 on: August 13, 2015, 08:13:47 pm »
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I ordered my Surf PI kits today.  Mad (yes, 2 - more than 1  Grin ) one is going to be a base model, the other heavily modified. It's only taken me 4 1/2 years to actually get round to it Violent, but now they will be arriving in the post in the next few days ... soo excited  Rider Great

now to worship the lords of MD technical help  Pray and ask for some divine inspiration (help): Amen

I been reading a lot about coils and seen some info about fast coil (sub 10us) on the geotech1 website, being made from Teflon coated wire.. now my questions are;
1)Is that single strand or multi strand wire I should be usiing? I'm thinking multi strand wire, but I'm not sure.
2) On the modified one I'm planning on putting the pin-pointer function into the circuit. Will shielding on the coil interfere with this function? or because it is grounded to the circuit, this should nullify any feedback generated by the shielding when the resonance in the coil happens?  :Smiley

yes,know there are manufactured coils out there... but that is not quite the same as building your own and understanding how they work.

Thanks again....

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« Reply #25 on: August 13, 2015, 08:37:24 pm »
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   Best to twist up a Easy Mono to start.  Cheap to play with and you can Mess around with it as you wish.

Here is everything I have on it.  Emmm Can't send to large.  Send me PM you E mail and I will send you a Zip.

I have a kit and Original Coil to play with.

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« Reply #26 on: August 13, 2015, 08:48:44 pm »
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As I understand it you want the pin-pointer to be working of the same circuit as the detector? well it has been done by a few of us and there is no problem doing it at all. You will need an SPDT switch to change from the detector coil to the pin-pointer coil, making the coil of the pin-pointer is very simple, you will need a piece of ferrite rod, the smallest that I have used was 100mm long and 10mm in diameter as for the coil I used 0.5mm magnet wire, before winding the coil onto the ferrite rod I insulated it with a winding of insulation tape. I did not try to get the same inductance or resistance as the detector coil when I did mine I just wound the rod all the way then when in use I turn down the power. You could use a 1/2 w resistor connected in series with you coil to get the same resistance as the detector coil. I then placed the assembled coil into a piece of electrical tubing that I filed with candle wax, placed a cap on the end and the job was done. 

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« Reply #27 on: August 14, 2015, 04:38:46 am »
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hmm... nice builds.. not quite what I had in mind.. . . but the ferrite rod would help focus the emf field.. did not think of that.. I was thinking of a small 2 - 3" coil in the centre of my primary mono hooked up to a common ground. A SPDT switch to jump between coils and a momentary switch to activate the pin-point function. ... yes 2 coils.. but a little worried about the second coil absorbing some of the flux from the 10" mono and loosing depth/sensitivity, but that is yet to be found out.
Another idea is to connect the two coils in series or parallel and see if things improve or worsen ... one thing I will definitely have to manage is the flyback voltages. especially from the smaller inner coil. it might be that I'll have to add a second sample circuit to the detector with a larger. resistance, so I sample the two coils separately.   ... yes, did I mention HEAVILY modified.  Grin

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« Reply #28 on: August 14, 2015, 06:21:00 am »
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Don't think your two coil Idea is going to fly but you can do like the dual field and wind on coil with two sections one within the other.

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Offline xavier
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« Reply #29 on: August 14, 2015, 04:12:39 pm »
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Quote:Posted by Lord Dracon
hmm... nice builds.. not quite what I had in mind.. . . but the ferrite rod would help focus the emf field.. did not think of that.. I was thinking of a small 2 - 3" coil in the centre of my primary mono hooked up to a common ground. A SPDT switch to jump between coils and a momentary switch to activate the pin-point function. ... yes 2 coils.. but a little worried about the second coil absorbing some of the flux from the 10" mono and loosing depth/sensitivity, but that is yet to be found out.
Another idea is to connect the two coils in series or parallel and see if things improve or worsen ... one thing I will definitely have to manage is the flyback voltages. especially from the smaller inner coil. it might be that I'll have to add a second sample circuit to the detector with a larger. resistance, so I sample the two coils separately.   ... yes, did I mention HEAVILY modified.  Grin

Well I have been using this pin-pointer for the past 4 years and depending on how I turn the power determines the detection depth, I think that if you respect the resistance of the coil you will be able to leave the power set to where you have it and have a good depth +-100mm on a one Euro coin. If your going to make all of them mods you may as well get another PI kit and use it for a pin-pointer.

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