Wireless Coil

[CDI]

Maybe is question stupid and asked before, but, does anyone tried to convert coil and md to be without cables?

[Davor]

Deus is such a device.

[CDI]

Deus is such a device.

Znam Davore za Deus. Jel' postoji negde tema o tome u kucnoj radinosti?

I know for Deus. Is there any theme about that in homemade work?

[Davor]

Not exactly. We had some discussion on wireless headphones, but even those tend to come with a quirk or two. Analogue are prone to interferences, and not fancy at all. Digital are prone to delays, and often variable due to retransmission.
Separating a main box from a coil would require a coil to have many functions included. It means you can't have a big battery there, so it must be low power. Also the communication link must be low power, which means the information going to a main box must be heavily digested, and the coil circuitry must have some brains on its own.
Communication link must be slow, and with constant bitrate. Hence the most of signal processing must happen at coil side.
As an amateur, I'd rather spend my time chasing targets with a more simple solution, than waste my youth on designing such a monster. It makes for a nice gadget though.

[CDI]

Thank's Davor, really good explanation. So, seems the guys from XP had a lot of work to make all of that functional.

[Davor]

It must have been a tightly coordinated group of people of diverse design profiles. A marvellous feat.

[Koala]

It must have been a tightly coordinated group of people of diverse design profiles. A marvellous feat.

There must be some advantage in putting the preamp in the coil even if its powered by a cable. Often wondered how much there is to be gained.

Loss and interference of a small signal in the cable to the control box

verses the loss and interference of a large signal must have a percentage gain.


little surface mount board that can be epoxied in maybe.


Having batteries in the coil can be a pain if they go dead and have to be in a waterproof compartment

[Qiaozhi]

Having batteries in the coil can be a pain if they go dead and have to be in a waterproof compartment

That's the elephant in the room for the XP Deus. What seems [at first sight] to be a really cool solution, has implications later on in the product's life. Also, purchasers of second-hand Deus machines need to be cautious, as there's no way to replace the battery when it loses the ability to recharge.

[CDI]

That's the elephant in the room for the XP Deus. What seems [at first sight] to be a really cool solution, has implications later on in the product's life. Also, purchasers of second-hand Deus machines need to be cautious, as there's no way to replace the battery when it loses the ability to recharge.

Didn't knew that about Deus batteries cannot be changed when they go out. What to do with coil after batteries go damn? Simply, i will use my lovely tool from garage, his name is hammerhead.

[Skippy]

The Deus coil LiPo cell can be replaced quite easily, and it's not too expensive either. And due to battery technology improvements, it's possible to fit a new cell with noticeably more capacity than early Deus models had. What concerns me about it is how critical the position of the cell is, I can't help thinking if it's 5mm off from where it should be, might the coil null be upset too much?

[Qiaozhi]

The Deus coil LiPo cell can be replaced quite easily, and it's not too expensive either. And due to battery technology improvements, it's possible to fit a new cell with noticeably more capacity than early Deus models had. What concerns me about it is how critical the position of the cell is, I can't help thinking if it's 5mm off from where it should be, might the coil null be upset too much?

This is what is says in the Deus user manual: "The search coil battery is sealed for obvious reasons of safety and impermeability. It must be returned to our service department or an XP distributor for replacement."

It also says "The LiPo batteries are designed to bear hundreds of charges and to last several years in your detector, thus resulting in significant savings in terms of purchase of batteries. After 300 to 400 charging cycles the battery still has 80% of its capacity, which then gradually begins to decrease over subsequent cycles.
As an indication, the batteries should last for around 3 to 4 years when used on a weekly basis.
Attention: long-term storage of discharged batteries may reduce their overall durability. If the detector has to be placed in storage, First charge the batteries to half of their capacity (40 to 70%).
Ideally you should then discharge/recharge them at least once a month."

[Skippy]

You're a metaldetectingforum.co.uk member, George, I guess you don't visit often?
There's several threads on the topic. You can do it yourself (YouTube videos to help you, I understand), or Regton can do it. Here's a couple of threads:
http://www.metaldetectingforum.co.uk...?f=239&t=59152
http://www.metaldetectingforum.co.uk...?f=239&t=76513

[CDI]

https://www.youtube.com/watch?v=bND5Ius163o
Looks easy, but we back to question: What about nulling...

[Qiaozhi]

You're a metaldetectingforum.co.uk member, George, I guess you don't visit often?
There's several threads on the topic. You can do it yourself (YouTube videos to help you, I understand), or Regton can do it. Here's a couple of threads:
http://www.metaldetectingforum.co.uk...?f=239&t=59152
http://www.metaldetectingforum.co.uk...?f=239&t=76513

OK - thanks for that.
So it's not impossible to do, but also not that easy. The best video is the one on the XP website, where they demonstrate the battery replacement using a Deus Battery Kit - costing 45 euros.

[Koala]

Watched the video. Yep not really a user replaceable part then. Doubt you will be able to get the connector or cover off as easy as in the vid.

Something I would tackle but we now live in a society where some people have to pay someone to change an ordinary plug

As for nulling as its away from the center of the DD I doubt the null will change very little as long as the battery is the same size a few mm out will still work the same.