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jrbeatty

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jrbeatty last won the day on October 15

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About jrbeatty

  • Rank
    Copper Member
  • Birthday 03/05/1951

Profile Information

  • Gender
    Male
  • Location:
    Burragate NSW Australia
  • Interests:
    Geology, history, Electronics, Prospecting.
  • Gear Used:
    QED detector with GPX 5000 in reserve.

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  1. The Reg Wilson Gold Album

    Now you know some of his story Reg ran into Ian a while back, but I haven't seen him for many years.
  2. Perfect Hunting Season

    Well done! No need to press that "panic" button now - -
  3. Busted A Fatty Today!

    The big brother's hiding somewhere - -
  4. That's correct, Jin Higher sea levels meant auriferous paleochannels formed deltas where they met the shorelines of the time. For example, the Murray basin was an inland sea during much of the Tertiary epoch. The problem, however, is the shoreline changed as the seas retreated - and the auriferous gravel deposits moved with it. This means that there is no particularly enriched contour elevation for prospectors to follow. Nonetheless, I've discovered certain elevations are noticeably consistent for alluvial gold. Now, I could tell you, but then I'd have to --- well, you know the rest!
  5. Big coil Jin. The impedance of the windings would need to match the GPX specs (among other factors) for it to work though. At that price I'd personally take a rain check. Tony mentioned that it was not a straightforward coil to make (unlike mono's) with a lot of interacting factors to consider The ground loop type coil is intriguing though, the principle being that you walk around (within the laid out transmit windings) with just the receive coil. Tony and Jim were developing a working prototype when Jim died. Tony tells me the depth advantage is staggering, but he hasn't got a reliable system perfected yet. Nenad probably has more info on the subject:
  6. According to my sources, Nuggetfinder have been field testing prototype coils for the GPZ for some time. These are somewhat lighter than existing coils. I suppose, in relation to aftermarket licencing, the ball is firmly in Minelabs court.
  7. Tony (an old detecting friend) has inherited Jim Stewarts coil winding expertise. They spent a lot of time together in the workshop at Laanecoorie Park experimenting with ground loops, different coil configurations, etc. He also communicates regularly with Rowan (Nuggetfinder) Tony has wound a number of concentric (coplanar) coils for the GPX and demonstrated some of them to me at the Laanecoorie test site earlier this year. Here's one not yet painted: On deep targets this type of coil clearly outperformed (depth wise and size for size) all the other coils we tested. These included flat wound and DD's. Tony related how, using this type of coil he had clearly heard a 14 oz colour deeply encased in solid ironstone (in WA, dug up with a Makita jackhammer) when no other coil he tried could hear it, even when partly excavated. Although we didn't test one on the day, Tony is of the opinion that this type of coil (size for size) will outperform the GPZ on deep targets: So far I'm unable to bribe him into making me one
  8. Right on the money! I've had good success on old deep patches doing just that with an 18" Coiltek DD. Jim Stewart and I found that using DD coils larger than 18" (on SD/GP detectors) gave minimal advantage and any slight depth advantage was outweighed by the inconvenience factor. Apart from the obvious size and weight issues, this includes deep false signals caused by mineralisation when running in "sharp" timing.
  9. Big Coils -- Do You Still Use Them?

    It's amazing how much expense anyone with a bit of imagination can save by making or modifying/repairing their own prospecting gear. In this day and age of diminishing gold returns every penny saved is important. It seems to me that the market for prospecting and after market gear is heavily loaded towards the affluent weekender. Sorry Mitchel! Off topic, rant over!
  10. The Gold I've Missed

    Aha! That's where I found my first piece (1 oz) with my brand new GT 16000. John H S had a lease encompassing the area where the "Pride Of Australia" had been found, and allowed me to detect it. This was long after you were there. My piece was about 40 meters from the worked discovery site. John and Ian then pushed the area where I found mine (result unknown) The day I bought my SD2000 (later again) I found a sharp 6 gram "splinter" of gold on the nearby ironstone blow. That area must have been a "jewel box" to the first detector operators.
  11. I have a 20" of similar age which I no longer use. It dates back to when Rowan and his dad Barrie were working together. For a time it was my main search coil but I eventually downsized to a 14" Coiltek orange coil. The Nuggetfinder was quite light for its size, but it became touch sensitive, which usually indicates shielding failure.
  12. Battery Alternative For SDC 2300

    I took some images of my 26650 lithium ion battery substitute for 4 heavy "C" cells. I use these in a cattle prod but the same setup will work fine for the SDC 2300 and is waaay cheaper than using 18650's in commercial sleeve adaptors, and has much more runtime. Because the 26650's with protection circuits have slightly larger diameter than normal "C" cells and are longer, you will not experience power disconnects in use. The power pass adaptor is a standard "AA" to "C" cell sabot adaptor with a short length of stainless rod substituted and cut to match the exact distance required. The charge adaptor is easily made up from pipe fittings and enables both batteries to be rapidly charged in series by my Imax B6 Mini. The extra voltage may not help a regulated detector but it sure boosts the cattle prod! Weight of four alkaline "C" cells = 260 grams. Weight of two 26650 lithium ion cells = 90 grams.
  13. The Gold I've Missed

    Very droll, Reg Here's our old cocky mate working another patch he found: Don't worry Jin, I'm always in trouble one way or another! Helping others with basic information (most prospectors know this stuff backwards anyway) never does harm and often has benefits eventually. Jim Stewart was worse than me, often revealing his finds exact locations to others (top bloke he was!) I suppose he figured he'd done his best with them and left little behind, but I remember when I first stayed with him, he let me loose on one of his patches within walking distance of his Laanecoorie Park. He had flogged it with an SD prototype (pulling about 15 ounces) but this machine had developed a fault and was no longer sensitive to deep gold. I dug several nice slugs with my 2100 before feeling guilty and showing him what he'd missed. He seemed shocked momentarily but absolutely refused my offer of an even split, insisting I keep it. I shouted him a slab of beer and we drank most of it that night, with the stories and gold theories flying freely. Next day we dug the rest of the gold, and that was the beginning of our partnership. I sure miss him. Like Reg, he had a great sense of humour as well.
  14. Big Coils -- Do You Still Use Them?

    Hi Mitchel: This low quality image (also from the Reg Wilson album) of Jim Stewarts "Bismarck" (36 inch mono) is the largest I've carried. Jim wound the coil and used to struggle carrying it until I designed and built the shoulder mounted PVC pipe frame shown. This used the SLA 6v battery as a counterbalance behind the operator, with the coil height adjustable by the nylon rope. The shoulders were well padded. Although heavy, the rig was surprisingly comfortable and well balanced. You swung it by moving your shoulders and the coil could be tilted on edge (for "pinpointing") by rotating the handlebars. You could actually operate it with your hands in your pockets in cold weather The detector is mounted on the frame on the right hand side of the operator (not visible) We also used a "36" double "D" but this was not as successful, and heavier. This setup found much big gold. Later, John Hider Smith made another variant which consisted of a long pole (8 foot or so) with his 36" flat litz wound mono on one end and battery on the other. This was attached via quick release hook to his belt at the balance point and also found much big gold, just how much we don't know because "Mr Secrets" never told us the full story.
  15. The Gold I've Missed

    Sometimes we are, unfortunately!
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