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  1. Dawn of the stealth dredge

    So within vortex bazooka it looks like the catch chamber is closed off? Is this the case and if it is how does it not overload with heavies? In the pic below it doesnt appear to have an outlet in the catch area. I’m designing my interpretation in autocad and I’m trying to figure out if the...
  2. Dahlke micro 4b initial thoughts.

    here are some of my numbers that I used when building my 4 inch tri jet. It worked well. It allowed me to run the 4 inch Keene ultra mini with a Honda gx120 and a Keene p160 pump.
  3. Dahlke micro 4b initial thoughts.

    From what I can tell the dahlke hasn’t ever really had a standardized riffle design. Most seem to have slight variations but all include the dovetail riffles. It should be pretty good on fine gold but probably not equal to a full size 4 inch dredge. That motor and pump is undersized in my...
  4. Dahlke micro 4b initial thoughts.

    Finally got the dahlke out again. The Honda gx160 ran much better then the crappy motor that I originally put on it. A few other things I did that improved suction, was to increase the high pressure line size to 2 inch so that the little pump doesNt have any constricted areas to fight before...
  5. Dawn of the stealth dredge

    Yep that’s where I got the idea from. Limited amount of info on it though. I’m also going to try and make most of the 2.5 inch version 3D printed. I’ve read his book and believe some of his design thoughts are sound and would do well if done with some modern tech and materials. I’m not...
  6. Dawn of the stealth dredge

    Awesome thread! Have you gotten any further with it? I'm working on something along the same vein. I have some of the subsurface recovery system drafted. Going to attempt to spin the water to get the heavies to separate to the outer wall while the lighter material goes to the faster flow in...
  7. Looking for Gold Divers information

    Hey guys I’m looking for any and all information in regards to Gold Divers products. I recently picked up a Gold Divers 1556 pump and have always been fascinated by their circle jets. Want to learn as much as possible about any and everything Burl produced under Gold Divers. Thanks guys!
  8. Dahlke micro 4b initial thoughts.

    Yep I’ve read the post many times. And did most the things that you recommended. I didn’t buy the complete dredge. I bought the mono body, the riffles, the frame, the pump and the powerjet. I put an engine on it that I should have and have since put a better engine on it. We will see how...
  9. Dahlke micro 4b initial thoughts.

    Reed I can’t currently move the engine back any further if I do it won’t be able to lock down on the frame rail. But once a compressor is added that should help balance the weight out better. If I can’t get the current engine I put on it running correctly I’ll be switching it out to a Honda...
  10. Dahlke micro 4b initial thoughts.

    Reed - I’m going to be playing around with powerjet lengths on it and a vacuum gauge to see if I can have some numbers give positive proof of the effect of the length of the power jet. The material seemed to always fill the dovetail riffles about 3/4 full. I’m not sure if that’s how they...
  11. Dahlke micro 4b initial thoughts.

    I finally got my dahlke micro 4b in and had the chance to run it some over this past weekend. A few pieces of info: I did not by the entire dredge from Erich who is the current owner of Dahlke in Sealy Tx. I bought the mono body, the DP150 pump, the dual venturi powerjet, the riffle tray...
  12. Thinking of getting a "back pack" dredge ,Question

    I may be late to the discussion but I’ll have a dahlke micro 4b by the end of this month. And will be doing plenty of videos, comparisons and articles about on my YouTube and website. Erich who owns dahlke now has been great to work with and I wouldn’t hesitate to recommend his stuff to...
  13. LIDAR website is up and running!

    I agree that mylandmatters is an incredible tool, but for what i generally do google earth cant be beat. I like to be able to make my own maps and add in things like geology overlays, soil survey overlays, topo map overlays, as well as my own data from the field. I have yet to find a program...
  14. LIDAR website is up and running!

    et1955 - The raw data is free but in most cases that data needs to be taken and run through a number of programs to be turned into something viewable and usable. And generally the free viewers that ive seen like what Oregon does is still not as high of resolution as what can be produced. And...
  15. Proline vs Keene full size 4 inch dredge review

    Thanks for the reply and info Reed. And my buddy has a newer proline and the jets are now mounted on the top and no longer on the side. N-Lionberger we have rocks out east but they generally arent as big as the west coast ones lol.
  16. LIDAR website is up and running!

    Underburden thanks for the input, ill try and play around with the small print some to get it pop better.
  17. Proline vs Keene full size 4 inch dredge review

    Thanks Russau! I tried to be fair and come at it from a functional standpoint of issues that ive had with both in the field! As i say in the video if your in the used market and either one pops up at a good price buy it! Mainly trying to get potential first time purchasers to truly think...
  18. LIDAR website is up and running!

    Hey everyone! I recently managed to get my website launched that is dealing primarily with providing LIDAR to prospectors and detectorists. I will say after taking almost a month to build i appreciate the people who build and run these types of forums even more now! The website is directed...
  19. Any core drilling experts on here?

    I worked for about 6 years logging soils and core samples behind geotechnical drill rigs. A diamond tipped core barrel is made for removing cores from bedrock and will not work sampling soils or alluvial gravels. For soils and alluvial gravels we used split spoon samples that were advance in...
  20. Proline vs Keene full size 4 inch dredge review

    Been awhile since I last posted but I plan to start posting more again. Proline Vs Keene review/comparison of their FULL SIZE 4 inch dredges. I go through each one piece by piece and discuss the ideas and reasoning on why i like or dislike each component. So if you want an in-depth nitty...
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