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Idaho Jim

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Everything posted by Idaho Jim

  1. Went down along the Utah border last weekend. Visited an old gold/silver mine looking for pyrite nuggets. Ran the Sweep Jig (patent pending) dry to see if it could recover the pyrite. Obviously, it did OK. I'm wondering about the "coppery" color. If anybody knows what that is, I'd appreciate the info. The GMT doesn't detect the nuggets, but easily "sees" the coppery sand. https://youtu.be/UDATYX62tt4 Jim
  2. Idaho Jim

    Newcomers beware

    Yup...that's exactly why I go to those places. I'm sure that, at many of the places I detect, I'm the only person who ever has. I may never find anything, but if I do I expect it may be really good. I'm not prospecting for flyspecks...I'm looking for a STRIKE!...LOL I'm heading out again tomorrow. This trip heading for an old silver "occurrence", and another spot where gems were recovered. Many years ago I did coyote hunting all around this particular area, but never ventured into it. Always wondered what was back in there. I'm looking forward to finding out. I doubt it's ever been detected. The only downside is a long, uphill hike to get there. Have to climb about 1,200 vertical feet...not much fun on these 69 year-old legs, but I'll manage. Jim
  3. Idaho Jim

    Newcomers beware

    I've been at it for several years without finding a nugget. I have found a couple of nifty coins, but that's it. But, I figured out a long time ago that finding gold isn't really why I'm out there. I just like the outdoors. If I wasn't nugget-hunting, I'd find another activity that puts me in the outdoors. Also, I don't hunt good areas. I often go where there was an "occurrence" of gold, but no mining. There just weren't many gold mines in my area that had nugget-sized gold. I accept that, but I still go. I hope, this fall to make it down to Rye Patch. Might do some poking around the Eugenes. If I find something...great! if I don't..well, I'll have seen some new country, and that's enough. Jim
  4. Idaho Jim

    New video of my Sweep Jig....

    The prototype had rollers on the arms. I may end up going back to that, but every extra detail adds to the complexity, labor time, materials, and thus the cost. I'm trying to keep the price under $600, and it's not easy. If I used rollers, they'd have to be omni-directional, as the direction of rotation changes as the position along the arms changes. Also, using rollers doesn't help much with the diaphragm wear. The ease of rotation is offset by the point-loading of the rollers. The spot where the roller rubs has moire load, and thus more friction, and wear on the diaphragm. The whole thing works well as it is....wet or dry. Currently, I'm working to get the weight down. Jim
  5. Idaho Jim

    New video of my Sweep Jig....

    Thanks, Micro. I'm already making some changes. The bungee doesn't hold the diaphragm tight enough, so it needs a winch-tightening strap. Not a big deal, but an improvement. We also found out it draws more current than we thought....roughly 4 amps, so I need to advise customers they'll want a bigger battery pack. I put a 10mil visqueen diaphragm on mine, and I've run almost 5 hours dry, so far. Running dry is harder on the diaphragm than running wet. I'm also working on a different version that may become the standard version I sell. I won't get really involved with that until the weather goes to cr-p...probably in November. I'm waiting to hear on the recovery of gold from black beach sand. The run is done, but still waiting to find out the results. The run was done without water, so I don't have high hopes. Trying to recover gold from black sand is tough, wet. Much more difficult dry, so I'm not optimistic, but we'll see. Jim
  6. Idaho Jim

    NEW! Hand Made Drywasher

    Yup...I was too impatient! Really nice build! I have a lot of respect for the guys that can build equipment like that. Jim
  7. Idaho Jim

    NEW! Hand Made Drywasher

    I get a page saying "call me", and a few other choices. Go to main page and get an advertisement for MineLab. Jim
  8. Idaho Jim

    Awesome new technology we're enjoying

    The stuff I ordered came from Namibia. Jim
  9. Idaho Jim

    Awesome new technology we're enjoying

    Well, Homefire, I ordered up a pound of the Devil's Claw. Will give it a try. I appreciate the advice, and will report back on how it performs. Jim
  10. Idaho Jim

    Awesome new technology we're enjoying

    Never heard of Devil's Claw, Homey. I'll have to look into that. Jim
  11. Idaho Jim

    Awesome new technology we're enjoying

    Looking forward to trying it, Unc. I'm really pain-tolerant, but this sciatica, is driving me up the wall. Ibuprofen handles it, but I hate taking it constantly. Jim
  12. Idaho Jim

    Awesome new technology we're enjoying

    I just ordered a small bottle. I assume it comes with instructions. I'm having a lot of pain in my hip...according to the docs, probably sciatica. Figured I might as well give it a try. Jim
  13. Idaho Jim

    New video of my Sweep Jig....

    Ya know, Saul, I've noticed that "selective" hearing isn't all it's cracked up to be...LOL In my case it seems to select what I don't want to hear instead of the other way around. Jim
  14. Idaho Jim

    New video of my Sweep Jig....

    LOL...my poor hearing is a blessing at times, but I had no trouble hearing that squeak. tried to get rid of it as best I could in the viodeo, but I guess from what I'm hearing from everybody, I failed....Ha. Maybe I should be marketing an elk bugle. Jim
  15. Idaho Jim

    New video of my Sweep Jig....

    Thanks, Bob. The actual concept occurred to me last August, but I'd been working on dry gem recovery for about 8 years, building 8 or 10 different designs. As it turns out, you can't recover gems dry. A physics phenomenon called "Granular Convection" aka "the Brazil Nut Effect, prevents it. So I built this for that purpose (not being aware of GC), and when it didn't work for gems I tried it for gold, and it worked great. A few bugs to work out, and it's now a pretty nice little wet/dry gold machine that can be built in almost any size. I sell the 18" unit for $550 + shipping, with a solid body of HDPE corrugated pipe. That model weighs 19lbs. The one I use myself is a skeletonized version that sells for $650 + shipping. It only weighs 11lbs. I'm amazed myself at how well these perform. They only draw about 1 amp, so can get by with a fairly small battery pack, and when used wet, they require very little water...just enough to keep the material on the diaphragm sort of soupy. Water has no impact on the recovery...that's all in the mechanical action.
  16. Idaho Jim

    New video of my Sweep Jig....

    LOL...there's a thought! Yes, this has been used at Bonanza bar on the Snake River to recover flour. Video here:Sweep Jig at Bonanza Bar The biggest gold on the Snake is about 50 mesh, and not much of that. Most is sub-100 and smaller. I also ran it at the LDMA/GPAA outing at the Blue Bucket in May. Actually recovered black sand and gold from damp tailings without water. Using water, in a demo, recovered 100% of black sand and gold in front of several miners. Asked to re-run the tails and found zero black sand or gold. Jim
  17. Idaho Jim

    New video of my Sweep Jig....

    Yup...I'm starting to believe there's graphite in this stuff. The sand is definitely conductive, but not at all magnetic. None, zero, nada response to a magnet. That means it's conductive, without iron, and it's probable the conductive element is graphite. I retried the GMT on it, and it detects both the nuggets and the dried sand. But, the GMT indicates the probability of iron at 70%. But that just means the phase shift is close to the iron range. Doesn't mean definite proof the material has a high iron content. Another thing arguing in favor of graphite is the streak test....almost black, and it glides across the surface as easily as a pencil. So, probably the black in the sand is graphite, and the coppery color is some sort of pyrite....judging by the color maybe chalcopyrite. What I'm the happiest about, however, is how well the Sweep Jig recovered those fines while running dry. If there was free gold there, it would have recovered it. That's what the trip was all about. That, and the recovery of some nice pyrite specimens. I'm sure I'll go back, but I'm taking the chainsaw next time...LOL Jim
  18. Idaho Jim

    New video of my Sweep Jig....

    I have no idea, Jack. The tailings are all a dark gray color. The geo report said the mine had limonite, shale, metasedimentary quartzite, etc. Whatever it is has a really oily look to it, and the material I dumped out of the tubs last night has a very black, shiny appearance this morning. I know it's hard to get off my hands....really gets into the pores of the skin. I'm assuming the dark gray material was the shale. I find it a little strange that ALL the tailings are the same dark gray material....very little other gravel, like quartz, etc. I know the belt of material it comes from is a metasedimentary quartzite. That belt extends about 6 or 7 miles into Idaho, and is about 1 mile wide. Lots of quartzite intrusions in the belt. Lots of prospecting of the belt, but not much to show for it, at least in Idaho. Jim
  19. Idaho Jim

    New video of my Sweep Jig....

    Many thanks, guys! I hate greasing these bushings...it just collects dust, but I'm making an exception in this case...LOL. Actually, I need to either go back to the UHMW plastic bushings, or try the HDPE. obviously, the Delrin against aluminum isn't going to work...LOL Jim
  20. Idaho Jim

    New video of my Sweep Jig....

    AAhhh, that's what it is. I wondered about the copper color. Many thanks! BLM's records show no mention of copper at that mine. That's really interesting. The sweep jig is something I developed late last summer, and through the winter. It is the absolute nuts! Works wet or dry, and recovers a very high percentage of flour gold. I applied for a patent in January. We'll see how it goes. It allows me to prospect places I'd passed by before. I've sold two of them...one to a guy in Edmonton who is using it on the NSR, and one last week to a guy in Arizona. He's got an old mine tailing pile, with gold, but no water. I'm looking forward to his reports. He also plans on taking it to the beach in Oregon next month. Here's a pic of another rock I found a few years ago about a mile from the mine. It also has a coppery sheen, and feels waxy. I thought it might be a mica schist, but now you've got me wondering. These rocks are only found in a small area of maybe an acre. really strange. Some of them are as big as a bathtub. A detector does not see them.
  21. Idaho Jim

    Near UV Flash Light

    Hmmm...I've never even thought of the surge issue....LOL Maybe I should have. I built two 12v packs for mine. They're NiCad's. Each one is 10 'D' size batteries. Each pack will run mine about 1 1/2 hours with both bulbs on. I usually only run the LW as I'm looking for gems. I use the SW occasionally just to get an idea of the general fluorescence of the minerals in the area I'm working. I'm getting old anyway, and I find that 3 hours of fluorescent prospecting is about all I can do in one night anyway. I wonder how one of those Li-ion auto-starter boosters would work? Jim
  22. Idaho Jim

    Near UV Flash Light

    What I'd like to do with mine is separate the ballasts from the bulbs. Have the bulbs on a wand, like a detector, and the rest in the control box with a belt, or chest mount. That setup would be the nuts. I've used mine with a wand, but trying to swing that 4 or 5LB weight on a wand is really tiring, even with a support strap. Jim.
  23. Idaho Jim

    Near UV Flash Light

    Yup. I'm thinking it probably had the same setup as mine, at one time. Either filament, or both could be on. Jim
  24. Idaho Jim

    Near UV Flash Light

    Yup...don't want SW on your skin, especially. Fortunately I live at high elevation, and usually UV prospect even higher, so it's cool enough at night, I usually have a coat on, or at least a long-sleeved shirt. Jim
  25. Idaho Jim

    Near UV Flash Light

    It may be that I'm extra sensitive to UV, though others have reported the same problem. It may also be that the reason I don't have symptoms from sunlight is the white light produced by the sun mitigates the UV sensitivity. So, when the only light is UV, I get sick. The goggles block the UV, so they make a big difference for me. Apparently about 1/3 of the population is sensitive to UV to some extent. I've never noticed any special sensitivity to fluorescent lighting....just UV at night. Jim
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