northwest DIY SD2000
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australian electronic gold prospecting forum.com  |  DIY forum  |  DIY forum  |  Topic: DIY SD2000 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: DIY SD2000  (Read 1089 times)
nnasskoo
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« on: Sunday February 28 2016 21:04:52 AEDT PM »

Hi friends  smile
This is my modded copy of sd2000 .Detect  1 euro coin at 30 sm  with 11" mono commander .
Is that ok?
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Doug
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« Reply #1 on: Sunday February 28 2016 21:18:17 AEDT PM »

  
Hi friends  smile
This is my modded copy of sd2000 .Detect  1 euro coin at 30 sm  with 11" mono commander .
Is that ok?


I don't know if anyone has ever tested a ML detector here with this particular coin.
doug smile
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All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin The QED contains NO patented or protected IP!!! No fake users on this site! This forum does not depend on  guest posting liars to survive!1/2 wit powerless to login and post! LO
WM6
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« Reply #2 on: Sunday February 28 2016 23:58:48 AEDT PM »

  
  
Hi friends  smile
This is my modded copy of sd2000 .Detect  1 euro coin at 30 sm  with 11" mono commander .
Is that ok?


I don't know if anyone has ever tested a ML detector here with this particular coin.
doug smile

Here in EU, Minelab PI series are used mostly for coin and relic hunting and not for prospecting like in AU.

nnasskoo results at 1 euro coin is more than OK. Congratulations.

What are your further plans nnasskoo?

To open publish your excellent SD2000 PCB design or to go commercial with pro made PCB's?

If you have surplus of your SD2000 PCB's what would it cost?


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crazy78
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« Reply #3 on: Monday February 29 2016 00:34:03 AEDT AM »

Congratulations wonderful work  respect
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crazy78
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« Reply #4 on: Monday February 29 2016 01:31:20 AEDT AM »

Hi my pcb coming from china.
Analog version
I see processor version (Ml 2000) nnasskoo
Good luck  nnasskoo  smile
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IBGold
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« Reply #5 on: Monday February 29 2016 16:14:38 AEDT PM »

  
Hi friends  smile
This is my modded copy of sd2000 .Detect  1 euro coin at 30 sm  with 11" mono commander .
Is that ok?

Hi nnasskoo,

I run a very much modified SD2000 with both multiple crystal and processor control of the timings but I do not have a 1 Euro coin to do a comparison for you I hope your version runs as good as mine.

Regards, Ian happy face
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Regards, Ian.
nnasskoo
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« Reply #6 on: Monday February 29 2016 18:18:40 AEDT PM »

  
  
Hi friends  smile
This is my modded copy of sd2000 .Detect  1 euro coin at 30 sm  with 11" mono commander .
Is that ok?

Hi nnasskoo,

I run a very much modified SD2000 with both multiple crystal and processor control of the timings but I do not have a 1 Euro coin to do a comparison for you I hope your version runs as good as mine.

Regards, Ian happy face
Hi Ian,
Give some examples depths of coins that you have on hand
Thanks in advance!
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GARY
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« Reply #7 on: Monday February 29 2016 21:17:47 AEDT PM »

  
  
Hi friends  smile
This is my modded copy of sd2000 .Detect  1 euro coin at 30 sm  with 11" mono commander .
Is that ok?

Hi nnasskoo,

I run a very much modified SD2000 with both multiple crystal and processor control of the timings but I do not have a 1 Euro coin to do a comparison for you I hope your version runs as good as mine.

Regards, Ian happy face

I do have a 1 Euro coin so I placed against some of our Aussie coins and it is the slightly smaller in diameter at 23.25mm to our $1 coin 25mm and its thickness slightly less at 2.33mm to our Aussie $1 at 3mm. Weight wise 1 Euro 7.5g and $1 at 9.0g.

A check on the net shows the 1 Euro Composition having it's outer segment: nickel brass and the Inner segment: three layers: copper-nickel, nickel and copper-nickel. However not sure of %'s of copper nickel and brass whereas our $1 is 92% Copper, 6% Aluminium, 2% Nickel.

I had a look back at some of my air tests with coins when I owned my modified 2000 and found I got our $1 at 32cm with the 11" DD which would be similar to using an 8" mono.

Gary..



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gef12
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« Reply #8 on: Monday February 29 2016 22:43:58 AEDT PM »

Love ur work...with the processor does it do auto ground balance...
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IBGold
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« Reply #9 on: Tuesday March 1 2016 16:04:31 AEDT PM »

Hi nnasskoo, I will do some coil tests with the 2000M tomorrow for you and Geff no we did not go that far now working on other things.

Regards, Ian. happy face
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Regards, Ian.
moodz
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« Reply #10 on: Tuesday March 1 2016 17:18:45 AEDT PM »

Dont call it an sd2000 copy ... if it contains trade secrets then you could be challenged ... coke is not patented but they sued lots of ppl for "copying" the formula which is a trade secret. Trade secrets dont have to be registered and can outlast patents ...see coke again.
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Doug
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« Reply #11 on: Tuesday March 1 2016 17:36:19 AEDT PM »

  
Dont call it an sd2000 copy ... if it contains trade secrets then you could be challenged ... coke is not patented but they sued lots of ppl for "copying" the formula which is a trade secret. Trade secrets dont have to be registered and can outlast patents ...see coke again.

I doubt that there are ANY trade secrets with the sd 2000.The full schematics  have been on Geotech for many  years.
doug smile
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bugwhiskers
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« Reply #12 on: Tuesday March 1 2016 18:40:47 AEDT PM »

RCD snubbers have been around for years. Colani in his 1960's patent referred to a switch between the HV and amp.
Eric Foster created a null summation of samples to cancel EF in 1968. Eric later expanded the use of an integrator as an averaging means to cancel log linear ground response. 5576624 expired in 2009 and 2011200515 was lodged in 2006 to segue.
When anyone mentions Minelab's IP, don't hold your breath waiting for them to elaborate.
Moodz, can you see any "Trade Secrets" in the SD2000?
Nothing is a secret if it's in the Public Domain.
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IBGold
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« Reply #13 on: Thursday March 3 2016 15:50:25 AEDT PM »

  
  
  
Hi friends  smile
This is my modded copy of sd2000 .Detect  1 euro coin at 30 sm  with 11" mono commander .
Is that ok?

Hi nnasskoo,

I run a very much modified SD2000 with both multiple crystal and processor control of the timings but I do not have a 1 Euro coin to do a comparison for you I hope your version runs as good as mine.

Regards, Ian happy face
Hi Ian,
Give some examples depths of coins that you have on hand
Thanks in advance!

Hi nnasskoo,

I ran some tests for you with my 2000 on the standard timings and I got the results below with the same coil as you used.

$1 Aust. coin                 = 305mm     Diam 24.88mm   Thickness  2.63mm  composition as in Gary's post above.

10 Cent Aust. coin          = 310mm     Diam 23.47mm   Thickness   1.69 mm.  silver type coin not sure of exact composition.

2 Cent Aust. coin           = 275mm      Diam 21.56mm    Thickness  1.89mm.  copper type coin not sure of exact composition.

Regards,  Ian. happy face
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Regards, Ian.
Blacksand
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« Reply #14 on: Sunday March 6 2016 09:16:28 AEDT AM »

Hi all.

Did a test on a 1 euro coin and got signal at 31 cm with the sd2000 set at 2.4mhz. At 2.7mhz got signal at 33-34cm. Due to emi, could not use 2.1mhz as I live close to the city, 2.4mhz was most stable. Also tried which channel gave best signal, channel 1 was best of both. Coil used was Minelab 11" mono commander.

Happy hunting
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GARY
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« Reply #15 on: Sunday March 6 2016 14:20:52 AEDT PM »

IBGold and  Blacksand,

Always good to see test results from others as you both have displayed also that may aid others such as nnasskoo for DIY.

DIY was not my thing so left it to others to do any mods inside to my 2000 when I owned one. It having not only the popular 4 Position Freq. Meg Crystal Switch a VCO also added further frequencies to the mix. Variable voltage adjusted manually via an external regulator allowed input voltages between 6.7v to 8.4v which I set at max although extra input voltage could be set if one wished with the regulator from the 12volt battery. However for me 8.4v was the sweet spot.

I assume IBGold's results using standard timings was either 1.8 meg or 2 meg frequency as there appeared to be slight differences between 2000 models if my memory is correct.

As I recall for me I found 3.1 meg setting as a good all round frequency using 8.4 volts feeding the detector with a DD coil connected.

Also operating in BALANCE II  instead of SEARCH produced some extra sensitivity on smaller targets.

Gary..  
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IBGold
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« Reply #16 on: Sunday March 6 2016 16:36:49 AEDT PM »

Hi Gary and Blacksand,

My tests were done with everything standard frequency ,Gain and voltages etc with all the Modifications turned off other than the new power supply and filtering which has to be there I did it that way so as to be a closer test for nnasskoo with his results it shows he is in the ballpark I could also have changed  timings ,Gain and voltage and a few other things which would improve the depth by 25% but that was not what was called for, Gary and Blacksand I find 3.2MHz or there abouts is near perfect but mine has complete control of the frequency so I virtually do not get any EMI the advantage of the Mario Mod.

Regards, Ian. happy face
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Regards, Ian.
nnasskoo
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« Reply #17 on: Monday March 7 2016 06:27:29 AEDT AM »

  
Love ur work...with the processor does it do auto ground balance...
Processor is only for timing. It's to easy to change timing with processor,now use SD2100 timing (may be is not 100% correct,i am sure only for tx pulse)
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nnasskoo
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« Reply #18 on: Monday March 7 2016 06:37:21 AEDT AM »

IBGold and  Blacksand,
Thanks for you made tests. You helped me a lot.
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moodz
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« Reply #19 on: Monday March 7 2016 07:52:19 AEDT AM »

  
RCD snubbers have been around for years. Colani in his 1960's patent referred to a switch between the HV and amp.
Eric Foster created a null summation of samples to cancel EF in 1968. Eric later expanded the use of an integrator as an averaging means to cancel log linear ground response. 5576624 expired in 2009 and 2011200515 was lodged in 2006 to segue.
When anyone mentions Minelab's IP, don't hold your breath waiting for them to elaborate.
Moodz, can you see any "Trade Secrets" in the SD2000?
Nothing is a secret if it's in the Public Domain.

...how about adapted and arranged ...
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