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nordic

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Everything posted by nordic

  1. I think it was mentioned somewhere, apologies for repeating if so, the water can get either through a ruptured speaker (salt water, etc) or battery compartment seal. Either way, it should be under warranty.
  2. Thanks for the suggestion. I looked on the web for galena, it looks like it should be close to lead in softness? However it did take me a while to cut it, I'd say it is as hard as steel, or rather stainless steel as it does not seem to oxidize in normal conditions. Maybe chromium... Washed it few times, few burnt crust flakes came off, other than that it looks solid. Not sure what it is. Not a meteorite most likely, but interesting to know what it could be. It was found in the farming field that is far from anything industrial or even habitation. Not sure how to do a steak test, does the back of usual bathroom tile work?
  3. Would it be correct to assume that multi-freq is outperforming any single freqs in most cases, except certain special need situations? Because that is what I witness normally - the depth and accuracy is far superior when using multi. Also, looking at the test box, it looks pretty small, wonder if there is a chance of magnetic field leaking through sides of the box too, as in, meeting no obstacles through air. On a side note, perhaps nothing new to some more experienced people here.. When looking at the RX signal scope, any magnetic, ferrous material was literally not only shifting the phase a lot, but also rising the whole impulse in the RX channel to such extents that any small signal from desirable object may become lost. ML take on this is that they are looking for small/fast signal changes in the context of slow and big as coil moves over them, primary reason why correct swing speed is rather important. Also, their RX line has about +/-1.6V (after the coil amp) of headroom, so any large ferrous object may potentially exceed/clip this, as a result, cutting off important details. In other words, perhaps, it make sense to distantiate the coil from the ground in certain conditions to get more headroom for the signal. I did notice this a while ago while detecting in tall grass, about 5-6" tall, and yet finding coin size objects 7-8" deep? Further looking at the scope, desirable objects mostly effect the very start of the RX wave signal, while all ferrous cause a significant shift and effect middle of the RX wave signal. It is also important to mention, I think, that it seems, that Nox TX strength and RX gain never change in analog domain, and perhaps digital too. The user sensitivity adjustment is merely an adjustment of the signal floor threshold. Lower it goes (higher sensitivity), more detail (and noise) it will start to process.
  4. EL NINO, interesting. Is there a difference with different GB values? in multi freg or/and single?
  5. The only pic I have at this moment, apologies if not too clear, the bend is under red cover (latex bike tyre tube 🙂 ) To be honest, this is my 3rd middle shaft because one of them snapped bending. I was using pipe bender. There is certain limit when aluminium simply snaps. Also those holes at the back, they tend to implode or give up 1st. Can't recommend trying it, breaks too easily. I also heated up the arm cuff and made it narrower. Standard it is clearly designed for Popeye arms
  6. One other thing, most of places I go, GB would jump from 0 to 80 within 20 meters, so there isn't one setting to suit at all times. I do use GB tracking now and then, but could never confirm it does anything good or bad. Information about GB is pretty vague - what people say vs my experience: - tracking GB can iron out good targets - not my experience - tracking GB is too slow - I find it tracks better than GB manually now and then - tracking GB robs processing power from useful work identifying targets - probably true? - incorrect GB will limit depth - not sure, need more tests like in post above - high GB makes more false-positives on bumps - yes, is Nox running hotter on high GB? - GB is irrelevant in multifreq mode - possibly? - GB is important in single freq - never use single freq, so not sure
  7. Thanks for that. Just have to add to this, read somewhere on ML papers, they do seem to have an automatic sensitivity adjustment outside user control, at firmware level, which, kinda, makes depth tests or any tests inconsistent. Hard to tell what else they do in the background.
  8. Got 2 middle shafts, so bent one to an S shape - much better, feels more direct. I think ML should've made coil ears off centre or an s-shaft. Had a constant fatigue in the upper forearm, which is no more. It is the twisting of the shaft during swings that the arm needs to counteract causing fatigue, as much as I could figure it out...
  9. Thanks, I’ll have to research who could verify it here. More pictures, sorry for the quality. It is not magnetic, but fairly heavy, about 10g
  10. Perhaps not enough information, but how does it look to you? It's about 15mm in size. Thanks in advance
  11. I think it is worth pointing out, that Carl and other people there were counting frequencies via a pickup coil, not directly tapped into the TX line. The difficulty there was to see how many frequencies due to their harmonics. What I could see by tapping right into the TX lines is that ML fires square signals into the TX coil independent of each other. It's not that these frequencies are embedded into overall signal, as with analog example, but they fire at their time separate to each other, not sure if they overlap, but it does not change the amplitude of the signal. Think of it as a varying length PWM signal.
  12. Tiny correction, I think it is pin 6 floating free. Pin 8 (middle) is the data from the security chip it seems. Pin 8 disconnected, the control box reports Cd and shuts down. It needs only 3 pins to power on correctly, Gnd, Vdc and Data.
  13. Hard to see on the photo, but they seem to have changed the coil side plug to a different type with lesser pins. The wire soldered to the connector casing is probably just a shield wire. All what it has now is 2 TX, 2 RX, 1 shield.
  14. I walk woods as well, along with fields and use primarily Park 2. Have never been fan of Field 2, it seems to be quite chatty and does not feel deep, perhaps aimed more for smaller shallower stuff? Then modes Park 1 and Field 1 I use for target checking. Recently started using Gold 2 for checking as well, it seems to ID iffy targets a little stronger than any other mode. I always run All Metal on, especially in the woods. If area is fairly clean from iron, finding a ferrous object may be a piece of meteorite (you never know). I'd recommend to not through away small ferrous objects at the spot, especially if they feel very heavy. Iron Bias helps to separate ferrous object better, but it in clean forests it may be not a concern, hence I would set it to 0. You can also try recovery speeds 2-3 to get deeper. If ground is clean, there is no need to have high separation. Run sensitivity as high as environment allows. Some trees have little fallout during the year, hence older objects may still be shallow. Pair of garden snips will help you with digging though roots and clearing dense areas. Hope some if this helps... One thing also to mention, if places that you explore were part of WW2, pay some caution. Nox can pick up large objects from immense depths. When you have a hole 30cm deep and no target yet in sight, know it will be big, and certainly not a coin! Just recently I dug out an aluminum kettle from 70cm deep and it sounded as it was on a surface 🙂
  15. From my experience, I could never tell the difference, but I GB it anyway, but not always. The soil here easily jumps into 70-80. I think the range is subtle. Compared to PI machines, where GB setting is audibly different, on Nox, there is just no difference... The only thing I noticed is that on higher GB settings, coil bumps become audible. I would rather relate the difference in PP to the firmware version. Original 1.5 has the sharpest PP, 1.7.5 and the latest v2 sound identical, but give somewhat broader-wider footprint signal... I find it is easier to size the target with the 1.5, as it cuts the sound right off when coil center is no longer over the target. There is no easy way to tell which firmware you have between 1.5 and 1.7.5, only through PC update utility. V2 has got the F2 setting and multiple backlight levels on 600.
  16. No problem at all, I'll repeat the test once again today, just need to find this button in the pile of others 🙂 I'll check if it is magnetic as well. I had a whole saga testing firmware versions, I think I dug it out with 1.7.5, but now running 1.5. Also maybe my hand had something to do with it.
  17. This is my experience so far as well, up to 5, nothing of interest came out. 1-2 - coke or energy gels, 5 - foil. If these come too scarcely, I do dig them however...
  18. Thanks. The fact that I have dug this button out, it should have indicated positive, I'm just not sure why it is giving me negative swinging it in air. I'm not wearing anything on me that would foul it. But all who replied, it really coincides with my findings as well, swings from all angles before deciding to dig or not. If I may extend this thread as well, if anyone has found meteorites, how do they id on the equinox, negative?
  19. I actually have this very same folding joint, but I could not get on well with it, so had to purchase a new middle shaft. Once installed, the rigidity was gone, especially with the heavier 15" coil. It is an excellent idea, but the plastic just does not do it. It felt like a wet noodle. It really needs stiffer material to work. Perhaps one can get used to it, not sure, but any wobble in the shaft distracts me from enjoying detecting.
  20. Thanks for replies. I forgot to say, I was air testing it. It is an old copper button about 10mm in diameter, pretty thin, with 4 holes, but due to age, all 4 holes merged together forming a big hole, I'll snap a picture of it when I have a chance. It was giving -1 on 6" coil. There were no other objects beside it, so got me thinking. It reminds me reading somewhere about a stacked coin situation which was giving negative TID as well. FE was 0. Anyway, it is not a big deal really, I did dig it out before somehow!
  21. Hey everyone, Just curious, has anyone tried lowering the tone break T1 to negative numbers or all the way down to -9 on your hunts? Is it worth it, did anything good come out? Or is it just a recipe for headache? Reason being, I was playing yesterday with the coil and found an old button that is clearly non-ferrous, but gives negative TID in multi-frequency and positive/negative on some single freqs. Thank you
  22. It took me 5+ times to get through the registration form vicious cycle, just pay attention to details. Referrer field wants a user name of Geotech forums, leave it blank if you don't know anyone. Lots of useful info there on Equinox, which will give lots of clues how it works, but the thread hasn't seen any activity for quite a bit. Nobody has a complete pinout diagram unfortunately. It made me hook up the oscilloscope and spectrum analyzer to see for myself, things check out - tremendous work people did there. Worth a read. Update: coil pinout is now available on Geotech. All credits to that forum, so not copying here.
  23. Guys, I wonder, does anyone know or have a diagram of the coil connector pinout? Many thanks! Apologies, didn't mean to start new topic, but it was moved separate. It may come handy for others perhaps. I'm going to tap into those wires to find out what they are once I have an inline connector made.
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