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Minelab CTX 3030 Detecting Forum


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Re: CTX 3030 circuit design - what's under the hood?
Posted by: Jason in Enid
Date: December 27, 2017 08:26AM
Quote
bklein
I’ve never seen a dead one for sale.... what have they sold for?
It would be a cool project to figure out the coil interface so we could experiment with coils.

Its not often but I have seen a few over the years. I don't remember the final price, but search through completed auctions could probably root them out. I think they end up going for a couple hundred because people are hoping its just a dead PCB and they can re-use/re-sell coil/face pad/battery/stems

Re: CTX 3030 circuit design - what's under the hood?
Posted by: Chrisdw
Date: December 27, 2017 05:24PM
I suspect that the chip in the coils is both an identification and calibration memory chip.

Re: CTX 3030 circuit design - what's under the hood?
Posted by: IDXMonster
Date: December 27, 2017 06:12PM
Quote
Chrisdw
I suspect that the chip in the coils is both an identification and calibration memory chip.

Chris-AFAIK the chip is for signal conversion. This makes for a “cleaner” signal to and from the coil by cleaning up possible interference coming through the cable itself. It’s digital TX to the chip,analog from chip to target and back to chip,and then digital RX back up to the machine. There very well could be other things embedded in it for various reasons but as I understand it,signal converting is its main function.

Re: CTX 3030 circuit design - what's under the hood?
Posted by: bklein
Date: April 06, 2018 05:32PM
I have obtained a test coil but not sure it is bad so not opening it up just yet. If anyone knows I'd like to know if the board is encapsulated in epoxy and where in the housing it is.

Re: CTX 3030 circuit design - what's under the hood?
Posted by: trojdor
Date: April 07, 2018 12:52AM
My understanding is the same as described by IDXM.

Additionally, I've heard references to an accelerometer...to determine sweep speed.
(Whether it's actually/really used...I don't know.)

Re: CTX 3030 circuit design - what's under the hood?
Posted by: bklein
Date: April 07, 2018 03:28AM
There have been videos posted showing the board taken out of a CTX coil and E-trak coils attached./working. Check tech section in geotech. I'm not getting very much help from him, probably due to the language differential.
I did get a coil I was going to use, but I discovered a faulty plug (see thread I posted). Too nice of a coil to destroy.

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