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filternozzle

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  1. I have now had a chance of using this coil on farmland for several continuous days. For such a large coil I am really surprised in its ability to pick up tiny targets. It is a great coin hunter for both hammered and milled. My only problem at the moment, because the fields are very stoney making target retrieval hard work. It's hard work to get down 5" or 6", and it's just a whole lot harder when in excess of 10"... It took me 20 minutes to dig an 18" deep hole. By the end of the day I was exhausted and although no great finds came up I was very happy with my haul and the coils performance.
  2. As I am a coin and artefact hunter I don't generally use fine gold soil timings. However I do use Sharp and Sensitive Extra, and they work well with this coil. This coil is now my coil of choice with the GPX 5000. Probably the only times I will change is to an Anti Interference in the event of detecting near electric fences or under large power lines or a smaller coil if the site dictates it.
  3. We have been given a provisional date of 26 Apr for travel within Scotland to be permitted. So I'm hopeful, weather permitting, of getting onto my sites to give this coil a chance of showing me what it's capable of. Really looking forward to swinging it! Will keep readers updated.
  4. The manufacturer describes it as a concentric. One coil transmits and the other receives. The weight is not bad for such a large coil, probably due to it being encased in carbon fibre. At 1100g it compares well with the smaller Coiltek 14" Elite Mono (1100g) and Nugget finders closed 15" Round Evolution Spiral Mono (1000g). I also use a bungy, so no need for the weight lifting. LOL
  5. Still not been able to get out in the field because of Covid restrictions. However, I have been out into the back garden and am delighted with it. The most striking point is the ability, at the flick of a switch, to change from a 21" mono to a 21" concentric coil. It will probably be sometime in March before travel restrictions are lifted but as soon as they are, I will be heading to a site or two to see what this coil can turn up for me. The sites have in the past produced medieval hammered coins, but the last few years have been extremely lean.
  6. With the coil control switch on CC, I would have the GPX on DD, with the Coil control switch on M, the GPX will be set to Mono. With the GPX on Cancel, the coil control switch with be on CC. Yes, the original coil switch settings were referred to as "hot ground, or mineralised ground" and "maximum depth". I believe some people found that confusing, so it is now named CC & M. M is mono, and will give max depth, CC is concentric which may be better in highly mineralised soil and also offers the opportunity of discrimination. As mention, I haven't had a chance to use the coil yet because of Covid lock down here in the UK. However, I will post my thoughts once I have had a chance to swing it on one of my detecting sites.
  7. I have no idea of the scientific principles involved. I am just a very enthusiastic detectorist. This coil is different to any others for my GPX, in that it is concentric and whilst used as a concentric discrimination can be used. Alternatively it can be used as a mono coil for maximum depth without discrimination. As a mono it makes use of the 21" outer coil. As a concentric it is using both the inner oud outer coils. Once I am free from the covid lock down, I will be able to see how it performs in the field. I hunt coins and artifacts in the UK.
  8. My Nexus 21" Concentric coil has arrived, yippee! A whole lot faster than expected. We are in lock down here so I think it will be some weeks before I can get onto a decent site to put it through its paces. However, as soon as the rain stops I will paddle out in the garden to get a feel of it, not ideal I know but I just can't wait to give it a try. Will take a couple of photos and post up as soon as possible.
  9. Reading a recent thread reminded me of the Nautilus and how it was perceived and received by detectorists here in the UK. My detectors of choice are GPX-5000 and Nexus MP/Ultima, with a selection of coils. Prior the Nexus my favoured VLF being the Nautilus DMC-IIB. At the time, relatively few UK detectorist had heard of the Nautilus and of the few who had and went on to purchase, most gave up on it. They couldn't get their heads round the necessary coil balancing or get to grips with the unique way it could ID iron and the way the batteries were exposed on the underside was a total turnoff. Nevertheless, as a lot of readers will know, the Nautilus was a very good detector, deep with good iron discrimination. The fact that some expressed negative opinions, didn't and couldn't change the fact that the Nautilus DMC-IIB was a very good detector. I have recently ordered the Nexus 21" Concentric coil for use on my GPX. This coil is like two coils in one. With just the outer coil in operation it's a 21" mono (no discrimination and max depth), when both the inner and outer are in use, discrimination comes into play. Two cables come from the coil into a small box, this in turn connects to the GPX coil connection. The little box has a two position switch for maximum depth (mono) and discrimination (Hot Ground) by using both the inner and outer coils. I will let readers know my opinion in due course.
  10. I am pretty sure you will reject some hammered with 10-11, 13-14 and possibly 18.
  11. If this is the case, what is the advantage in using the Nox over other good machines?
  12. You mention high EMI in that area. EMI can/does affect performance, maybe that's the culprit???
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