Buildable machine close to the GPX-5000

[usefi5961]

what's the image?

[Andi68]

There is snow on the board

[usefi5961]

[kt315]

There is snow on the board

i had wrote many times that patented trolles of ML are monitoring forum alltime. they killed QED, the will kill any good project.
no chance.

[green]

best discriminator ferrous-gold

[Gunslinger44]

I'm not a ****ing ML troll, my first project was a Sniffer which I have pics of the build.

[filos]

like

[kt315]

i believe. but we can not to speak about a detector of QED or qpx-6000 class buildable. that is restricted area.
or you wait full data on TDI (code, gerbers, pcb for 10USD, schematic, part list) here designed by Moreland and Foster?
we can do only simplest detectors. i meet two mentions about ML for just one week. so why ML is not sure sponsored
Geotech1? i see huge noise generator spam from ML followers. then why ML does not want give us a KIT? a soldered pcb for 50USD?

[Qiaozhi]

i believe. but we can not to speak about a detector of QED or qpx-6000 class buildable. that is restricted area.
or you wait full data on TDI (code, gerbers, pcb for 10USD, schematic, part list) here designed by Moreland and Foster?
we can do only simplest detectors. i meet two mentions about ML for just one week. so why ML is not sure sponsored
Geotech1? i see huge noise generator spam from ML followers. then why ML does not want give us a KIT? a soldered pcb for 50USD?

ML will never produce a kit for metal detector hobbyists. It's not part of their business plan.

The QED was targeted by them because it violated one or more of their patents, and the QED designer and supporters were particularly vocal and constantly attacked ML on other forums. If someone starts cloning ML designs and selling them to a wider audience, you could well expect some action to be taken. There are plenty of other ways to skin the proverbial cat without copying someone else's design.

[dbanner]

https://m.made-in-china.com/hot-chin.../Gpx_5000.html
Chinese specialist in skinned cats.

[Qiaozhi]

https://m.made-in-china.com/hot-chin.../Gpx_5000.html
Chinese specialist in skinned cats.

I suspect the innards of these detectors are nothing like the ML originals.
https://www.youtube.com/watch?v=aJqD6R2GwCA

[dbanner]

The Chinese could easily make perfect copy of any Minelab detector. Whether or not they do so is a matter of whether or not you bring your factory production and parts train to Beijing. Pseudo-economic blackmail.

[Carl-NC]

The GPX5000 uses "dual voltage technology" (DVT) which in under active patent. Patent law allows you to build it only to evaluate its claims, you cannot legally use it beyond that. Furthermore, helping someone build a patented device for end use is itself actionable under "inducement to infringe." All that said, I have no problem discussing the technology and how it works but a Geotech-based project that infringes the patent probably isn't in the cards.

DVT uses a low voltage for a long TX pulse and a high voltage for a short one. It then likely uses multiple samples for each decay and then does some math to determine ground/viscous response, plus some attempt to identify ferrous. All probably done in software where you can't see it. The design of the TX circuit alone is pretty challenging so I would recommend sticking with a simpler design and work to tweak it up in performance. The TDI, ferinstance, leaves a lot of performance on the table because of the dual-field coil and the need to be mass-produced. Focus on a faster coil and faster front-end and you can probably get down to 6-8us, maybe less. Switch to bipolar TX and you can get the rep rate way up. There are other strategies to pursue, all easier than DVT and patent-free.

[kt315]

If someone starts cloning ML design
---
sorry before cloning something you have to get the full schematic and code. we did not see that never.
yes, we did see just QED schematic. thats impossible to compare something we know with something we do not know.

[Carl-NC]

sorry before cloning something you have to get the full schematic and code.

If an exact clone is what you want, yes. If you want a functional equivalent, that can be designed without the full schematic & code for the '5000 once you understand how it works.