Jump to content

KrisDeVo

Member
  • Posts

    14
  • Joined

  • Last visited

 Content Type 

Forums

Detector Prospector Magazine

Detector Database

Downloads

Calendar

Posts posted by KrisDeVo

  1. On 10/9/2020 at 7:43 AM, Steve Herschbach said:

    Sounds like you’ve done your research. The Poling and Clarkson reports are great. 

    Fine Gold Recovery of Selected Sluicebox Configurations 1989

    Gold Losses at Klondike Placer Mines - Gold Recovery Project 1989

    An Analysis of Sluicebox Riffle Performance 1990

    A review of placer gold concentrate recovery and upgrade options 2011

    I’m a carpet under miners moss guy due to Clarkson.

    Thank you Steve. Some of those I haven't read before. Great reads for sure. I've never seen actual 90 degree angle iron run in a dredge before. Its always been a modified type dredge riffle from Keene or Proline with more of a 45 at the top running flat with the box. The riffles in this old Dahlke are the same with the addition of 1 1/2 flat bar in some areas.

    The way this box is set up with the header going from 24" wide to 34" wide over the first 3 feet would seem to me to be the best location for un classified 1 1/2" riffles for bigger gold. Then run a 3/4 to 7/8  wire mesh screen over smaller riffles and expanded for the next 3 feet. Last 3 feet run 1/4 mesh over small expanded. 

  2. 7 hours ago, Valens Legacy said:

    My grandfather had a system similar to what you are wanting to build. His had the 1/4 mesh under the expanded so that it would catch the larger nuggets along with the smaller pieces. He had the 2 pieces separated with a couple of washers to create better catch for the small nuggets.

    I remember having to take it apart to do a cleanup and saw a bunch of gold of all sizes. He always said think outside the box and try everything to make it work the way you want it. I still try that today.

    If he still has the old sluice I will send you some pictures if I can locate it.

    Thats a pretty interesting way of using the woven wire. Never heard of that before.  Would be neat to see some pics if you end up finding them.

    • Like 1
  3. So we did end up pulling that old 8" out of the bush from an old mining camp (previous post). We're going to go through the whole thing and get it back up and running. Main question I have is about sluice box design. I've read "The Clarkson Study" a few times over the years and just re-read it. Did a bunch of googling, youtubing and searching forums, but its hard to come up with great information about sluice box design for a larger dredge like this. I like Keene's sump system for fine gold but I wont be building that. For the most part I'm going to use this on our claims that are on a larger creek. We do have fine gold but not a ton of it. What we do have is potential larger gold (1-5oz nuggets).  Most of the gold ranges from 30 mesh to 4 mesh.

    Looking for links to good information and/or input on ideas on how to put a box together. Sadly when the old AMDS forum shut down I stopped keeping up with any other forums with new information after bouncing around a while. I can build/fab just about anything needed. Also curious to what you guys think about some new types of matting in a large dredge. I have all winter for the build.

    Box is 9'x34". 1st 3 feet follow the flair angle till it meets the max width of the box. The old riffle set up leaves a lot to be desired. Had been thinking I wanted to do some smaller woven screen at the last few feet of the box for smaller gold and then talked to Mark Keene. He said they have been testing 1/4" woven mesh (1/8" thick) over expanded metal and it was really doing well. Dropped the water flow to 1/2 the rate when the screen was 1-1 1/2" above the expanded. 

    Was thinking 1/2-3/4 woven mesh for the first 2-3 feet over a combination of Hungarian riffles and expanded metal ( separately, not on top of each other). Then 2-3 feet of just hungarian riffles. Last 2-3 foot maybe run a section of 1/2" woven mesh and then 1/4" woven mesh over a combination of smaller riffles and expanded metal. I would like to make 2 sections in there for some hog mat maybe. Also curious what you guys think of just carpet and moss over carpet in some of these different sections, what size riffles and expanded for the different sections also.

    What do you think about this equalizing power jet design and hose attachment to the powerjet/flair.

    Dredge came with four 18hp Vangaurd motors and two powerjet/flairs.

    Any opinion on any part of this or links to information is appreciated! Thanks

    20200912_163239.jpg

    20200912_163240.jpg

    20201001_130304.jpg

    20201001_130320.jpg

    20201001_130346.jpg

    20201001_130442.jpg

    20200918_172751.jpg

    20200918_172815.jpg

    • Like 2
  4. 10 minutes ago, jasong said:

     

    Thanks for all that great info Jason! Will definitely get that a shot.

    Some of the ground can have tons of iron, enough that the hole vein will be hot. That was at least at the lode. There is so much ground at the top of the mountain that maybe I wont have to deal with that very much. Would you suggest the DD at all for that? Thats the coil I had on when I found that one pictured.

    Will also look at getting that other coil. 2hrs till go time

  5. 18 minutes ago, jasong said:

    Is there a reason you are using the 5000 instead of the other detectors? They are all better suited to crystalline, wiry, or lode type gold distributed in quartz than the 5000 is. Generally speaking anyways, depending on what sort of ground you are in though, but it sounds like they all worked well previously in that ground.

    The smaller the coil the better for small gold on the 5000 though, yes. Mono coils are more sensitive than DD's, especially when it comes to the old style or stock coils.

    If you are detecting the side of that hill pictured, and you have all the detectors mentioned, I'd be taking the Gold Bug 2 and the SDC. 

    The 5000 is all I have. The other guys who have the other detectors are not apart of this new area. My buddy with the helicopter is thinking about the minelab 1000 or maybe the fisher 19.

    Okay looks like I will run the smaller coil. Thanks

  6. 4 hours ago, mn90403 said:

    There are many threads here that suggest specific settings for specific spots and you should look those up but you should also consider just staying near the default settings.  I'd also get to know that 8" coil as well as you can.  It is a pretty nifty coil and can find some big gold if it is around too.  It is great on the steep terrain you are showing.

    There will be more people chiming in I'm sure.

    Mitchel

    I'll check those out and do a little more searching. Is the 8" coil good/better for small gold too? Thanks

  7. Going back out to a place I've been to a lot but with a twist. Finally talked my buddy into flying me out with his helicopter. We went last week but only got on the ground for a few minutes before we had to leave because of weather. In 5mins I had a little nugget (pictured, soaked in muriatic acid). I mined in this area last year running a test for hard rock. On out days off we went out with the detectors, GPX5000, GPZ7000, SDC2300, and two gold bugs (not sure the models). The gold bugs crushed it and the SDC2300 next and then the 7000. The 5000 was last. Non of us really are proficient with any of these. I maybe have 50hrs on the 5000 over the past 4 years. A lot of the pieces are small and kinda wiry.

    So im going back up with the 5000 and would like some help on recommended settings to start with. I have 3 coils. The two that came with it and a small 8" mono. What would you guys recommend? Thanks!

    IMAG5572.jpg

    DJI_0222_Moment.jpg

    117641505_694332227962823_3735236521235397637_n.jpg

    117444986_1586239751545689_3652835943047607981_n.jpg

    • Like 4
  8. 16 hours ago, 2Valen said:

    Glad that you found out more about the dredge as I thought it was something custom. The floats are used on many of the boat docks around here and they are pretty tough. Those power jets are also custom made and if I can find the old supplier I had from a Florida job I had done I will send it to you. I believe those were made in Texas, but I can't remember just where.

    Well thats great to know where the floats came from! Wonder how long the plastic lasts before they get brittle.

    Also wonder about the power jets, Dahlke is in Texas, wonder if its from them.

    Good info man thank  you.

    • Like 1
  9. 43 minutes ago, Steve Herschbach said:

    I can see it being a custom Dahlke. Not anything common, that’s for sure, as I’ve seen most commercial dredges made in the last 50 years, and that one is ringing no bells at all.

    https://www.dahlkedredge.net/product-page/mini-8-series-gold-dredge

     

    Thanks for the response Steve. Have you seen those floats before? Owner says his partner (who passed away) worked with Dahlke in 2001 to build it. Sounds like his partner made some of it. Does the power jet look familiar?  The dredge looks to be a commercial size and maybe not a mini like pictured on their site.

    20200811_225039.jpg

  10. Been a long time guys... Found an old 8" dredge im thinking of bringing back to life. Curious if anyone recognizes this make/model of dredge. Owner says it has keene pumps and thinks maybe tecumseh motors but not sure. Have a couple of pics but wish I took more. Motors were in a locked cabin so I didnt get to see them yet. Planning on picking this up in a couple of weeks. Will be a long trip to get. If anyone has any info it would be much appreciated. Thanks

    20190912_184740.jpg

    20190912_184734.jpg

    20190912_184749.jpg

×
×
  • Create New...