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About ophirboy

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  1. Minelab Fix For The GM 1000

    I think that the GM being such a new beast , with a very fast processor that some users are calling some of the genuine abilities of this machine as being faults rather than genuine advancements simply because the older gen machines don't behave this way . This vlf machine has features never seen in A vlf nugget detector before and as such will have idiosyncrasies that just have to be learnt and understood to get the best out of it . I too have struggled to understand some of the behaviour of the monster. But it has to be remembered the technology I was familiar with is know getting quite long in the tooth. Running the monster in full auto means that the machine is adjusting sensitivity and ground balance in unison and the response to ground conditions will be a lot different to a detector like the Gold Bug where the operator sets the response parameters.I too have some bump issues with the coil but usually if I'm rough with it and I'm running high sensitivity, but I can't honestly say it distracts me all that much. I guess a machine with such high sensitivity and audio is going to be a bit touchy . We will have to see what minelab comes up with but it's certainly not a deal breaker for me. PM🇦🇺
  2. 15 Pieces For The Zed

    Good on you JW , you have the gear , the time and the patience and that's how you get the gold .its funny how the GM has become an expensive pin pointer, it seems that's about the only serious use I've seen for it on these pages . PM🇦🇺
  3. Early Minelab - Original Eldorado

    Thanks guys .it was an oldie but a goodie . Simple to use and lightweight with minimal controls . The mineralisation control seemed to be a simple 50% ~100% sensitivity switch. There was another detector around at the time called an A1 prospector that had a similar sensitivity switch but included an analogue signal strength meter similar in size to the Garrett A2b groundhog.
  4. Early Minelab - Original Eldorado

    Thanks JR , I can remember the up market red model but not much mentioned on this one . Interestingly minelab address is listed as 36 George st Sydney.. I do remember the mark 2 it was the first model to resemble the later underslung models like the eureka.
  5. One of my early vlf prospecting detectors , it's a minelab but I can't find any history on the unit . It was one of the first units to offer a high and low mineralisation switch and a ten turn GB but not much else , it was converted to hip mount hence the fox like plug where the handle would normally be , there's no information on it on the Minelab site. So if any body remembers it they might be able to fill in the gaps on specs etc.
  6. The six pieces I Dollied had a combined content of just over 3 grams of gold and the largest piece of quartz was the size of a baseball , very iron stained and in one piece , the gold could be seen once cracked open with a hammer. All gave a positive reading on the meter once dug and scanned close to the coil. At depth the meter swung more to the ferrous.
  7. Pyrite?

    Good enough for me , ive never found it in large enough quantities to test not that I've ever had the urge to, I'm still trying to work out why my GM picks up my hand , it makes it almost compulsory to use a plastic scoop. The metal detectors we have at work for food packaging screening certainly will pick up your hand although the coil is a square unit that's about 4 foot square and must have very high sensitivity as they have to find tiny metallic particles inside 20 kg bags of flour based products.
  8. Pyrite?

    Here's a question for Steve . If iron pyrite is paramagnetic does this mean it could cause an effect on an induced magnetic field in the same way as permanent ferromagnetic mineral Even if it's only short term whilst it's in the coils influence. regards PM
  9. Pyrite?

    G,day Mike . Iron pyrite is a type of iron sulphide , it has a crystalline structure that is usually brassy or gold in appearance . Pyrite or "fools gold" is often seen in the alluvials in creeks and streams and due to its shine and light reflective qualities is mistaken by prospecting newbies as gold . A metal detector would "see" iron sulphides as background mineralisation due to the fact that it is rarely found in large lumps but rather broken and scattered in sand particles although at times crystals can be found in quartz and ironstone in bulk deposits . As gold deposits in Australia are usually associated with iron of some description we are constantly battling this presence in an effort to find the gold hidden within . Articles written in this forum will give you a good idea on the brands available and the various models ability to handle the effect of ground mineralisation . Regards PM
  10. Bit Of Zed Gold

    Good work JW. Your lucky a lot of the ground around Otago is in places people are not likely to camp or dump a lot of rubbish on , a lot of spots that may be be likely to have potential in my area are close to the current river or creek beds and as such have property sheep fences that over the time since the rushes have led to enormous amounts of steel wire and fencing articles rusting away , and being so accessible have camp rubbish as well . A lot of the ground was also reworked by the Chinese who were extremely efficient , although when I see those pictures of yours I may be getting too old to climb those sort of hills and still have energy to detect. The most annoying rubbish in my area is the foil wrapper that comes from inside a cigarette packet , these pieces weather into tiny pieces and give a strong non ferrous signal on the GM . Now the snows melting over there you should be able to get into it again, we have just had the hottest September day on record so it's going to be a long hot summer. With scenery like you have it's almost immaterial if you get gold or not . It's good to see your getting results for your effort. regards PM
  11. Makes Ya Think

    Yep, that's our russell. He's a real coight.
  12. I have found some specimins that had to be dollied and panned as the gold was not visible , with the GM 1000, , these pieces where on dumps close to mined areas.
  13. Aussie Gold Monster Appraisal

    Thanks Steve . I have not tried general searching using the manual as you would on knob detectors , I tend only to use it that way in pinpoint and dig mode . Bhogg was interested in the discrimination tests so I thought I would throw in the details . I had a 2 gram nugget ( see picture)that was slightly crystalline found first time out with the Gm that I buried in a test spot in what I would call medium to high mineralization soil ( see ironstone sample from that test spot in picture ) . I then drilled a 3/4 hole 5 inches deep and dropped the nugget in as not to disturb soil density. I then set the monster to auto plus and scanned from multi directions and through the ground was noisey a typical non ferrous zip showed the presence of a good target ( the meter was pegged to the left on all passes) . I then switched to manual 5 but the ground was to noisey so backed down to 3 to get a comparable noise to auto plus. ( the meter would still show no movement to non ferrous . But the signal was good . After retrieving the nugget I tested it in the same loose soil and the meter showed positive non ferrous around max 1 1/2 inches from the coil , it bounced between at 2 - 3 inches . So let this be a lesson to all you Aussie GM owners who only dig by the meter reading . And as Elma Fudd would say " be vewy vewy careful. .
  14. Aussie Gold Monster Appraisal

    G,day Bhogg . Yes it's certainly an interesting machine . A nice machine for first timers if they can't afford a PI . As others have said , you have to punch up the sensitivity for specialist crevice work , but the auto and auto plus are great for trouble free switch and go detecting .users have also commented on its beach ability so it might end up being a general purpose detector for a lot of people . I have found the user friendliness of the discriminator depends very much on how tough the mineralisation is your area . The Americans seem to be able to wind up the sensitivity a lot more and the ferrous - non ferrous bar graph becomes more reliable . Try it yourself with a lead shot or small nugget down around 5 inches . The monster pings it as sweet as honey but the graph won't budge to the right for love or money until you get it out of the ground . Sometimes just one swing to the right on another coil direction gives it away . I have become totally dependent on sound identification until it's in the surface pile .ive watched 2 videos of guys in Victoria passing over and missing larger nuggets with the GM , but they are running full sensitivity in high mineral conditions and simply overloading the ground response , running in auto or auto plus would have shown much better results . And your right Gold is not a renewable resource when it's gone it's gone. Good luck. Paul
  15. Boot Alert

    I had a really comfortable pair of Merrel boots , however the two part soles seperated and rendered them useless and they where an expensive item , I think about 300 Australian . So I have gone back to senthetic toe cap work boots .Less comfortable more durable as I'm always scraping leaf litter of the ground with my right one.