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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bugwhiskers
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« Reply #20 on: Monday March 7 2016 12:31:21 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.

...how about adapted and arranged ...

Adapted and arranged is old hat, worn out, the art has been advanced, it's now arranged and adapted.
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All posts are my opinion and are stated without prejudice and in the public and consumers interest.
Blacksand
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« Reply #21 on: Monday March 7 2016 14:18:49 AEDT PM »

The major secrets of of the sd2000 were of the significant finds discovered with this detector that users kept quiet about.
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Alluvium
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« Reply #22 on: Tuesday March 8 2016 11:44:14 AEDT AM »

  
The major secrets of of the sd2000 were of the significant finds discovered with this detector that users kept quiet about.

Hi Doug & Members,

Black=sand was that a shot about the start of the SD 2000 in Australia

Here below is a story, it’s an interesting one, and was told to me by an early Minelab director.
This was also confirmed to me by one of the original detecting team, who was out there “testing” this money making wonder.

Cheers Alluvium.
=======================================

The Story of the SD 2000 PI’s.


July 1986. The Gold Seeker 15000 VLF was released.

Behind the scenes as each new Minelab VLF was being developed by the Consultant R&D Team at Adelaide University, things were also going on in the back ground.

These R&D people were quietly working away together on the development of their original University project, from way back in 1984, Dr. Don McCoy’s Pulse Induction Detector.

How much time was employed in perfecting this is not known, but it was happening behind the scenes, yet most of the Minelab group knew very little about it at that time.

But there is a very intriguing story about all this, especially over the years from 1987/ 88 up to 1995. Really it is a fascinating revelation.

Anticipating the abundance of gold to be found with this new prototype PI detector in Australia, these designers decided an arrangement should be put into place first.

That was to get a percentage of the gold from the “testing” of the PI. I am told this figure was set at a 25% share of the proceeds from the sale of all nuggets found.
                                                                                                                                                              

The Gold came thick and fast from these field trials, and the money or gold arriving in Adelaide was greatly received. Pieter H, and his friend were soon rolling in it too.                                                                            

More proto PI’s were made and “(lent out)” to other “trustworthy” and successful Aussie Pro’s over in the West, now things were really starting to snowball.

Then not long after this, a selected group of professionals, working at detecting for a living, mainly around the Wedderburn district of Victoria at this time, were bought into the fold, and provided with these new PI detectors.

Over the next few years, the goldfields were being gleaned (Some might say raped), of their golden bounty. This gold was being found by an ever increasing number of only, (especially chosen) lucky individuals.  Many large nuggets were found during this time.

As each new model VLF Minelab detectors  GT, FT, XT etc, were released to the public, behind the scenes, the New PI boards were neatly cut in half and slotted into the now smaller VLF plastic control boxes.

These disguised PI’s were effective enough to keep the big secret intact. This charade went on with many coloured cases used, e.g. both of the 2 Grey 16000’s cases, the Blue XT 17000’s and even the Red Gold-striker box were used.                                                

To put this saga mildly, many fortunes were made, and many thousands of ounces rolled in over those years.
Some enormous nuggets were found, and we the detecting public knew nothing about what was going on.


With this wealth also being distributed in Adelaide to a lucky few
, you can be sure we the common Folk, would have all been kept in the dark for a lot longer, but for a few silly people.


Now that’s another Story in itself:

Edit for small corrections A.

=============================================================================
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crazy78
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« Reply #23 on: Wednesday March 23 2016 20:52:50 AEDT PM »

I hope this time success smile
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WM6
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« Reply #24 on: Wednesday March 23 2016 21:03:07 AEDT PM »

Looking good. Congratulations.
Awaiting for your final success report.
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Global capital is ruining your life?
You have right to self-defence!
nnasskoo
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« Reply #25 on: Monday March 28 2016 06:46:38 AEDT AM »

Does anyone have sample timings SD2100?I need timings for channel 1 and ground channel
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crazy78
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« Reply #26 on: Wednesday April 6 2016 20:13:42 AEST PM »

Hi. Do your use extarnal speaker.
Do you have any advice?
  
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crazy78
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« Reply #27 on: Monday April 11 2016 21:53:53 AEST PM »

Hi  smile  ml2000 finish. I used crystal 2.65mhz, 11"mono coil test
 coin = 26.5cm     Diam 22.6mm   Thickness  1.6mm
  
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Doug
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« Reply #28 on: Saturday April 16 2016 10:58:35 AEST AM »

  
Does anyone have sample timings SD2100?I need timings for channel 1 and ground channel

The only timings that i know  are in the public domain are those of the SD2000 on the geotech forum. If you can borrow an SD2100 you can find the timings by using a CRO on the synchronously demodulated outputs.
doug smile
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When is 1halfgram4three (a proven hacker and  village idiot!) going to stop telling lies on his “forum”?
nnasskoo
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« Reply #29 on: Tuesday May 2 2017 19:34:39 AEST PM »

My new project happy face Added Iron Reject

  
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crazy78
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« Reply #30 on: Tuesday May 2 2017 21:47:13 AEST PM »

Congratulations  good work
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