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  1. Some buddies of mine that were dredging down streem from me last year let me use there letrap to do a cleanup from my 6, and man it worked great! Not a spec in the taillings and ive tested several other sluices and has found a disapointing amount in the tailings of others. I been keeping a eye out and have only seen one online shop have 2 in stock. Of course i didnt have the money to blow at the time and they both sold quick. Are they discobtinued?
  2. I've been trying to come up with a unit to recover gems dry, but finally realized that the "granular convection" problem can't be defeated. In the process of building and trying various ideas, I came up with this unit. While the dry recovery of gems requires some very tight classifying, and thus isn't practical, I tried it for gold, and was simply amazed at its abilities for heavy metals. I have tried it on all sorts of raw materials, running bank feed at roughly 2" minus, and have yet to find a material it doesn't work on to one extent or another. I ran it dry...no water, on damp material at the LDMA Blue Bucket outing near Baker, Oregon a few weeks ago, and recovered flour and black sand from old tailings from previous outings. Running wet, the day before, on new material I recovered very near 100% on black sand and gold in front of several witnesses. They suggested re-running the tails, and zero black sand, or gold was found. Last weekend I attended a local club outing at Salmon, Idaho. The material was a heavy clay with lots of rocks....not a fun material, at all. At the common dig, one of the guys next to me, running a highbanker, mentioned that my little unit was handling the clay really well. I was the only person running 2" minus directly into the machine, and the rocks were agitating the material so the clay broke down, and the rocks were mostly clean before they went out to tails. The day prior to the common dig I went down to the locale the common material had been hauled from, and ran the material dry. This was a nasty, damp material. I expected nothing and was surprised to see both black sand and gold when I did the cleanup. Certainly I lost quite a bit, but any recovery working dry from damp material is an accomplishment. This unit works wet or dry. Very little dust running dry. Very low water requirement when running wet...roughly 50 gallons/hour. The full utility US Patent has been applied for. You can see the prototype running at Bonanza Bar on the Snake, along with pics of the recovery here: Jim
  3. Do we have any beach miners here? I'm in Oregon and do a bit of sand sifting. The Oregon laws for the beach include No Power equipment so you have to ground sluice or have a recirculator above the high tide line or above the grass line. Kind of a pain but doable. Anyway I have a thread going over at TreasureNet that is a little rambling but it will show ya what kind of equipment I use and some of the results.... Nope nothing like the Nome beaches but it gets me off the couch and I manage to eek out a little color. So here's a link to the thread, hope you find some humor in it as well as maybe a little info. too. http://www.treasurenet.com/forums/sluicing/454120-got-out-little-today.html If we get a discussion going here I will just post anything new here instead of a link to another forum. Thank's for looking. Also does anyone have any info on beach mining in northern cal.? I can't find a thing on it and I have heard of a couple very promising beaches. But I won't spend the time and energy on them and the trip without some knowledge on the regs.
  4. So, after playing around with a few ideas, I figure it's time to go ahead and make a larger scale sluice. No tiny 95GPH flow, this is going to be 500GPH. That's just over 5 times as powerful as my previous "pocket sluice". This is basically a small Gold Cube. Half the width, and scaled down in some areas. This one is designed to take real gold sluice rubber matting. I bought two types, one is generic "High-Low" matting that's 2.3mm tall. The other is "Vortex" matting, and it's 7mm tall. The trays I have are designed to print with minimal supports and material, hence the honeycomb grid. There is a little angular lip at the top of the matting area that keeps the top of the mat in place, and places the water and material flow completely onto the mat. The little pegs at the bottom keep the mat from sliding down, and and small enough to not impede water flow in any meaningful capacity. The underflow section at the top is actually the exact same dimensionally as the Gold Cube, so that the water flow works correctly. Under the foot where the underflow is, is a cutout that fits into the raised pegs at the top of the bottom end, so they can stack neatly. There is only 0.3mm of play between the parts, so that it's a nice, tight fit. The top tray, or "slick plate" is the same general idea, and has a 9 degree angle, just like the matting tray. The red lid slides into the slot around the top, and creates a tight sealed box that directs the water flow. It has only 0.3mm of clearance. The back of it will end up having a threaded tube, 3/4" to allow a bilge pump to be hooked up to it. What's not pictured here is an additional piece that directs water flow down to prevent excess splashing and uneven output.
  5. I found some good gold in clay. Sticky, greasy stuff but shows promise. So I ask you old sourdoughs, what is the best way to process this material? I have been smooshing it by hand and then panning but it's not very efficient!
  6. Just finished this project, figured somebody might like it around here.
  7. Well, as far as I can tell, it's the smallest FUNCTIONAL sluice box. This isn't a cute scale model to look like a neat paperweight. This thing actually WORKS! Let me know what you think! This has taken me well over 4 months to develop past where you saw it last time. I still have a few minor tweaks I want to do to it, but all in good time. As long as you can spoon feed it small enough material, this will work for you. I guess this would be more suitable for processing concentrates, but it should still be a hefty worker! Features: * Self-contained power (4x AA rechargeable batteries @ 1350mAh each) * 3x 120 LPH micro pumps @ 6volts each * Self-recycling water system * Can be used as a single or double tier system * Sluice trays are set at 8 degrees * Removable riffled drop-ins (currently printed in green) (upgradeable/swappable) * Debris catch bin for removing excess material from the basin * Scotchbrite scouring pad used as a particulate filter to prevent pump clogging * Fully disassembles and packs into itself for painless transportation * Watertight, isolated battery compartment won't get wet from splashes or overflow * Drain holes to prevent water buildup around solder connections to pumps, and in storage area * Spare storage area can be used for rubber mats, vials, filters, etc * Riffled trays (3D printed) designed for use in this system with its specific flow rate/angle * Quickly comes apart for cleaning of the trays or storage * Currently takes 687.52 grams of PLA filament @ 1.75mm (52 hours to print on my settings) Things I want to improve in my next version: * Isolate the pumps better so they don't suck up material or silt * Raise the edges to allow it to process larger piles of material without spilling over the sides of the trays * Make a better trap to catch the waste material, rather than let it build up in the main basin * Design riffle drop-ins that are more easily removable * Possibly design different types of riffle drop-ins This one was just before this 2-tier version, when it was at a single level. Check out this point in the video, where a pretty good size nugget shows up!
  8. This is a 3D printed blue bowl version 1, it worked amazing for doing my last big clean up and sucked the sand away very quickly. I didn’t want to pay an arm and a leg so I built my own, leave an e-mail if you want the file. The whole project cost me less than 30 bucks or so. Parts: -172 GPH Pump -3/8 Tubing -On/Off Valve -12 #10-24x1in Screws -9 #10 Washers -Rectangle Tub -Small Bucket -Printed Parts
  9. I have been working on this for a couple weeks. It's a collapsible, customizable, self-contained, super light, 3D printed sluice box! I know there are other folding sluice boxes, but none of them actually fit in a backpack, or are light enough to carry in one hand. This solution would be EXTREMELY helpful! I'm on my phone trying this, so when I get to my laptop, I'll write in a bit more. So I'm currently in the CAD stage. I have a guy that does 3D printing for me, and his machine is limited to 12"x12"x15" so I might have to shrink the size of the project down to fit, as I don't have access to, or can even afford, a larger 3D printer. I have this up on Patreon to attempt to raise some funding to start getting prototypes printed, and boost this project towards the finish line! This is my Patreon page: https://www.patreon.com/M1dn1ghtN1nj4
  10. I tripped over this extensive article, available as a free download. Here is the abstract: The article sets out to clarify the special character of the North American gold pan and why it remains so popular – in spite of widespread dissatisfaction and many modifications and innovations. The North American pan is distinctive in being circular with a flattish floor ringed by an outwardly sloping wall. Its identity is confused by over-use of the terms 'pan' and 'panning'. The North American pan gyrates in a distinctive orbital motion driven by both hands of the panner. Although many other motions are resorted to (tapping, to-and-fro, tilting, and tick-tock), it is the orbital motion and flattish floor that together distinguish the pan from most other hand-held gravitational devices. In spite of its enduring popularity, no scientific tests have been published on the North American gold pan or for any of the innovations covered by 30 US patents awarded since 1861. It remains unclear if the North American gold pan is more efficient at recovering fine gold and flat gold than is a lotok, batea, dulang, ninja bowl, grizzly pan, mat, bucket or any other sort of hand-driven gravitational device. Some innovations are long-forgotten but merit attention. For instance, bars to keep the panners hand clear of the water, cables to hold large heavy pans, and several pans designed for panning without any water. Traditionally the North American gold pan was a combined digging and washing device, but today most models are not designed for digging and require a spade to be used. Gold recovery in Gold Pans -the term... (PDF Download Available). Available from: https://www.researchgate.net/publication/313562132_Gold_recovery_in_Gold_Pans_-the_term_'Panning'
  11. Does any place still make and sell the rubber Knudsen bowl liner? Google seems to just lead to a bunch of spam pages. I acquired an old bowl and the previous owner thought there was a store in Reno that made or sold them but I haven't had any luck locating said store. Also semi-related I am rebuilding an old jig, never used one before, and I was wondering what people use for shot? Do you just buy steel shot in bulk like from an ammo place or is there something cheaper and better to use specific to jigs? I see tungsten shot available for jigs but it's the same density as gold more or less so I'm having trouble seeing how that would work, especially if I want to save the black sands too. I'm curious what people use here?
  12. My sister ran into a fossiker when out camping who was having an issue with tiny shot while finish panning. He was sucking the shot into his snuffer bottle when trying to collect the gold. Any suggestions? I have a feeling he's not the first person to be annoyed by this.
  13. I ran 2 Ozt of my -50 mesh, black sand concentrate through the Blue Bowl. It came out to .5 gram. This was 2 oz dry concentrate off the top of the container, I suspect the bottom my be richer after all the jarring around for the past 2 weeks. I'll send the Blue Bowl tailings and about a couple lbs of concentrates to Rege in PA to see what his Miller Table can do. If I could fill the back of my truck with this stuff it might be worth something, but as it stands not really a game changer. Still waiting on Rokon parts, then back to Gold Country. I've got a new plan, of course. 118 degrees here in Sunny Yuma tomorrow, but it's a dry heat. Yeah great!
  14. Hi there RR, All this gadget is doing is mechanically classifying material into a gold pan. Nothing you couldn't do with a manual classifier over your gold pan which you could possibly get away with. I know with my sluice boxing I made & use a bucket classifier than can process a lot of material pretty quickly to feed down the box. Clean up time Good luck out there JW
  15. Super Cool! If it can handle the punishment of Hardcore Diggers? Enjoy! Cheers, Ig
  16. Check out my new setup for those remote areas where gas powered engins aint allowed
  17. Unfortunately due to weather my plans for a gold hunt today are destroyed. I was going to hit my favourite creek with my sluice. It's a Keene A52, I normally run the gravel through a 1/4" classifier before putting it into the sluice and I am finding quite good amounts of gold, even the tiniest little flour gold bits are staying in the sluice. The creek has quite a good fast flow and I've never had an issue with the sluice not handling my gravel, is it necessary for me to classify and am I using the right size classifier, it sure slows me down a lot but I don't want to lose gold by just shovelling straight into it. Also, is it safe to leave the sluice in all day, with water flowing through it while I stop for 30 minutes or so for lunch, or should I pull it out if nothing is going through it for a while? Just worried that I may lose Gold if there is nothing passing through it. Thanks for any tips!
  18. OK I am new to gold panning but I want to purchase one so I can do some sampling around my property have searched the web for what would be best for a beginner there are so many different types on the internet that for a beginner gold panner it is pretty confusing what does everyone suggest for a beginner at panning I know panning is not easy at first and there is a technique to it its a learning process as everything is thats new to someone just looking for suggestions I figure a gold pan would be the easiest way to sample and see if there is gold here and the cheapest to start
  19. I took a picture of my collection of crevice suckers for the Classifieds and figured it would make a good photo to post here for people to see a few designs old and new.
  20. Has anyone tried one of these? Looks like a versatile piece of kit! I'm wondering what kind of run time you would get out of the electric pumps on say a 29 series deep cycle battery... https://keeneeng.com/mini-max-power-sluice/
  21. Hello, my first post. I purchased a deceased prospectors never used, no brand name, no manual spiral wheel recovery system (and other goods from the son). I can add that it came in a Rubbermaid protective ultility case marked "ActionPacker", is about two feet tall when assembled on a frame type stand with control panel.
  22. After researching every gold wheel available, priced under $1,000.00? The Keene GW25, 25in diameter gold wheel proves to be the most bang for the buck, being able to produce gold dust-sized gold, and feed 400+ lbs of material per hour. At $475, it can't be beat.
  23. I'm looking to get a plunger style magnet for removing black sands from concentrates when finish panning. I've seen a couple which are labeled 8 lb and 16 lb respectively. Often bigger/faster/stronger means better, but not always. Any suggestions? Does the choice matter if the material is dry (as in bone dry) or wet (as in submersed in water)?