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Success With EMI

About a month and a half ago I started experiencing significant EMI wherever I hunted, or so I thought it was EMI. At first I thought it was just a run of bad luck with my hunting locations. And when I went to a park and heard chatter where I'd previously had no EMI problems, I shrugged it off as nearby stray interference that probably wouldn't be there the next time I hunted that spot. But time after time on each hunt I'd turn on the machine and the chattering would begin immediately. It didn't matter if I used the remote without the headphones, or the headphones without the remote, the chattering was consistent. It occurred whether I was using preset programs or my custom programs. I followed all the rules for turning on the machine: telescoped-out the Deus, held it waist high or higher away from all metal/power sources, turned on the remote first, waited for calibration to end, then turned on the headphones. Chattering would start immediately after calibration--with the remote and then with the headphones. If I turned off the remote, the headphones would still chatter. There was no debris whatsoever between the coil and coil cover as I clean it after every hunt. 4K gave the worst noise and would progressively ease with higher freqs, but still continued at an irritating level. Turning down sens to 80 would quiet it down some, but the chattering was still obnoxious enough that I had to reduce sens further. Those of you who've read my posts in the past, know that I don't run my machine hot and I usually use manual GB. I like to run stable and don't need much power in my area anyway--targets here are at worst 8 inches deep. I read some of the recent posts here on the subject of EMI and while some of the suggestions eased the chatter a little, the problem continued. I even reloaded 3.2 with no relief. I continued to hunt; mostly in 12K because it was quieter than 4K or 8K which are the freqs I normally use. I flipped over to 4K only long enough to confirm some targets, but it was finally dawning on me that I was going to have to contact XP, which I did. I sent the coil, remote and headphones in so they could troubleshoot the problem. Moe, an XP technician (in Massachusetts) contacted me today and told me that something was indeed wrong with my 9 inch coil--he didn't know exactly what, and said he's only seen two cases like this in the past two years. They're packing my machine up tomorrow and sending it back with a new coil (which Moe has already tested). I think it's a pretty big (great) deal when a company's technician contacts you to give you information about your situation--that's the rare kind of service that I'm glad to see is still a priority for some companies.

When I first got the Deus, it ran silent ALL the time. I could run it next to my buddy's Minelab and next to my girlfriend's DFX with no noise whatsoever. But later, once the chattering started when I turned on the Deus and got worse next to other detectors, I should have suspected the noise was no coincidence and sent it in right away. I don't know what caused the problem and neither does Moe. I've not dropped the machine or banged the coil; I've generally been very protective of it.

Despite the problems, I was still able to make some finds since this began happening. It wasn't easy; checking signals with EMI is not a fast process, so I count myself lucky to have continued to make finds considering the situation (see attached in no particular order).

Although I haven't posted much here lately, I'd like to thank all of you, new and experienced Deus users for keeping this forum alive with extremely informative posts. When you provide insight into your experiences in the field and let others learn from it, that's worth something. As far as I can tell, this forum has the most current and useful Deus-related information for U.S. users.

Here are my finds over the past month and a half or so. Most of these finds were on private property. Some of the finds were easy, some were found using the Deus' ability to sniff out good targets collocated with not-so-good targets...
 
Glad to hear they were able to resolve the problem and provide good service. If you were able to find all those nice keepers with a faulty machine, I look forward to seeing what you find with a machine that is working properly.

Thanks for the good detailed information on the problem you were having. It helps us all.

I look forward to your next post.

---Cladiator
 
Sounds like just the issue i had with my original 9" coil. Horrible sounding chatter in places, where i had previously no problems at all.
 
New coil has returned home and it is QUIET! Looking forward to getting back out with it!

Appreciate Cladiator and Finder for taking the time to comment :)
 
I'm trying to pin down what may have caused my coil to go bad in the first place...assuming it was not defective when I got it new in May. This is how I manage coil usage/charging:

My batteries are topped off from the previous hunt when I returned from that hunt. So when I go out for my next hunt, I use the cigarette lighter adapter to charge all three components enroute to the hunt site. When I see the coil flashing, indicating a complete charge, I unplug the adapter while driving, and when I get to the site, I unplug the cable from the components and begin hunting. Is it possible this could somehow cause a coil problem?

The other thing I do upon returning from a hunt is charge the batteries. I use a timer as someone here suggested. Then, when everything is charged, I unplug the AC adapter from the wall and disconnect the cable from the AC adapter itself. I leave the cable attached to each of the three components until it's time for the next hunt. So, the cable is connected to the charging clip, which is also attached to the coil...it may stay like this for several days until my next hunt--which I already stated gets plugged into the car adapter. Is there any way this could cause damage to a coil? Does anyone else do this?

I follow the manual with regard to not charging during storms, etc., so I'm scratching my head as to how this could have happened (so it doesn't happen again, assuming the coil was not defective when I purchased it).

Any ideas? Thanks.
 
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