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peluk
03:16:35 Mon
Nov 30 2009

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"Goldgrabber"pans-from Alan Trees

Recently,I made a comment about the efficiency of two goldpans I have.both are of the same design.There's no logo visible but they were from AMDS.They have two sets of steps,large and to the side,smaller ones.These are excellent.They are Keene or Eastwing.I don't want to take away from that suggestion and I use them in combination with these next ones.Let me explain.

For me,a round pan has limitations.swirling the dense smaller specimen presceened sands and gold in the pan bottom will not let the gold penetrate to the bottom.Stick your finger in the material as you swirl it.You will feel the material is still packed on the bottom.You nudge it to the stepped area gradually but it is still a dense mass there.
As you gradually tilt to run off lighter material over the stepped edge,gold,or some gold will go as well...too often.

Next limitation is encountered here in backwashing.You chafe away at the bottom of the crescent shaped pile with an induced wave action but gold will sneak down around the perimeter of the bottom.

Here are two remedies one of which will be the "Goldgrabber"pans of Alan Trees from www.golddredgebuilders.com

If you only have round pans,you can use your tub(if square/rectangular shaped0.
As you tilt the pan to run off material over the steps,rap the pan perimeter against the corner walls of the tub.The action will settle the gold into the depth of the steps fairly well.Before backwashing,with less of an angle,do the same and gold will be pushed into the bottom top edge in a compact collection.With a round pan,this collection can open up to the sides and start to lose as it is backwashed.

Here's where the "Goldgrabber' design comes in and excells.
When you rap the edge of the pan against the corner walls,the force of the displaced water cannot be lost.The pan design is rectangular except for one end.It looks like a section of a standard pan...but with very deep grooves.Only the smaller one has the deep grooves incidentally.I'll discuss that too.
Back to my point.Because the force of the displacerd water cannot dissipate yo the left nd right around the arc,it curls back and opens the material in the steps.It keeps it fluid allowing even flake gold a better chance to settle deeper.
You will decant waste,bring the pan down again and repeat.when finished the pan will be in a verticle position with only two tablespoos of material in the grooves.This can then be put into a round pan of choice or panned in the "Goldgrabber".I feel its best point is in concentrating the material for a round pan in a more easily controlled quantity...2 tablespoons.

Now,the larger pan was a disappointment at first.I wanted the same deep steps as the smaller.I was going to send it back.When I thought of the lost postage,I decided to give it a try.

First of all,if it(the larger"Goldgrabber") had the deep grooves,it would hold material and be clumsy for one handed use.It has somewhat rounded steps.I assumed it would lose small gold in a wink
but it does not.
Look at the video of it's use from the site and you'll see a very good separating device.

In the first stage of the panning,you'll see that the water splashing off the side walls will open up material much better than a round pan.You put your finger in the pan during this movement and it goes to the bottom without material resistance.

I think the next step is to have an automatic oscillating corner shape to butt the pan against to really accomodate long term concentrating using the larger pan.Sitting the pan on a vibrator just makes the material pack.Side to side action with directional inertia generated by tilting works very well with the large and small "Goldgrabber" design.

  
baub
03:26:20 Mon
Nov 30 2009

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Re: "Goldgrabber"pans-from Alan Trees

Peluk,

How would you compare these pans with the Le Trap square pan ?

b

  
peluk
04:22:06 Mon
Nov 30 2009

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Re: "Goldgrabber"pans-from Alan Trees

Baub,I have leTrap rectangular pans and this design surpasses them I think.
When I was first messing with the LeTrap pan,I mentioned it to a very competent beachminer who now dredges exclusively.I asked his opinion and he was luke warm on it.I didn't know why.I continued to use it until I got into gold in combination with a heavy content of suspended solids.
I found the material would pack in the apex of the steps and keep gold from displacing it.That, combined with the fact I could not observe the material going over the side because of the opaque color of the slurry,made me cautious of it.
In a pan with muddy, suspended content,I can't say much for the "Goldgrabber"because I haven't tried it.I can say this however.I gradually got awy from the LeTrap pan because I didn't like the characteristics of the backflow action.This "Goldgrabber"has a controllable backflow.

I think if I were trying to pan material with lots of suspended material,I wouldn't.I'd first water it so the suspended material would be run off maybe in a larger tub with upwelling flow.

Study that post on the trommel and one manufacturer's comments on "watering"or fluidizing.See how this is an important consideration in many designs.

I brief,I think the arched section of the "Goldgrabber"gives better selection activity than the Letrap linear steps...because...the water can put the gold back in suspension from the side to side sloshing in the LeTrap even if you were tapping it against something.The "Goldgrabber" will concentrate the gold in the deepest point in the steps because of the curling back waves.The curling action beng caused by the deflection from the side walls at the ends of the arcs.

  
cubsqueal
04:24:39 Mon
Nov 30 2009

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Re: "Goldgrabber"pans-from Alan Trees


And maybe any comparisons to or comments about the Maverick pan while square pans are being discussed. Has anyone tried one and had favorable results?

http://www.goldpanprospectors.com/maverick.html

* * * * *

Some experiences with the Maverick:

http://gpex.ca/smf/index.php?topic=2189.0


  
dragline
05:09:12 Mon
Nov 30 2009

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Re: "Goldgrabber"pans-from Alan Trees

Here's a youtube video of the Maverick in action...
http://www.youtube.com/watch?v=SXnDdGGMVJg

  
Danfromny
06:10:53 Mon
Nov 30 2009

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Re: "Goldgrabber"pans-from Alan Trees

Heres a pic, we used them all summer in Nome, worked Great on the fines, couldnt knock the gold out of the pan.

  
peluk
07:51:30 Mon
Nov 30 2009

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Re: "Goldgrabber"pans-from Alan Trees

Cub,I have those as well.They were made by LeTrap also as far as I know.I had 2 and one actually had LeTrap embossed on it.You can get them with a set of screens that fits inside.I goit the first one from Canada via ebay.
The larger LeTrap rectangular pan is made of the same material as the LeTrap sluice while those referred to as "Maverick" pans seem a bit thicker.

There is a different action with them.The steps in both versions are shallower than the small "Goldgrabber"in Dan's photos.If you were to slosh the water from side to side in the Maverick,it would just drag some values to the outer end and put them right back on the top of the material from the subsequent rush of water.
The arched steps as you can imagine let the wave course along the step but in so doing,the heavies settle in the depth of the arc...not here and there.
If you were to operate it along the long axis in a fore and aft motion,there's no contest.The steps are almost a 90 degree cut in that Maverick/LeTrap design.Holding onto fines is a hit and miss thing.

  
peluk
08:01:15 Mon
Nov 30 2009

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Re: "Goldgrabber"pans-from Alan Trees

Hmm...?I think I gave that same explanation twice.It almost feels like I'm back in my bar at Ester listening to former thawfield hands from Mintasota....only now I'm them.

  
Danfromny
18:54:37 Mon
Nov 30 2009

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Re: "Goldgrabber"pans-from Alan Trees

Heres some gold in the riffle slightly elevated

heres the pan flat

theres lots of room in those riffles to hold gold

  
Danfromny
19:44:29 Mon
Nov 30 2009

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Re: "Goldgrabber"pans-from Alan Trees

Heres a spot to get a great deal on a Gold Grabber Pan and clean up sluice box
http://cgi.ebay.com/Gold-Grabber-Pan-and-12-x12-sluice-box_W0QQitemZ260515862530QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3ca7f49802
good luck, later Dan

  
Danfromny
22:52:54 Thu
Dec 3 2009

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Re: "Goldgrabber"pans-from Alan Trees


  
baub
11:39:51 Fri
Dec 4 2009

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Re: "Goldgrabber"pans-from Alan Trees

Thanks Peluk and all.

b

  
Danfromny
13:16:42 Sat
Dec 5 2009

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Re: "Goldgrabber"pans-from Alan Trees

I bought a bunch of pans and am selling them at a great deal to get some cash up for my drilling thru the ice prospecting expedition this winter. The theory behind the idea, is to auger some holes in a grid pattern in the recreational mining area off the coast. Take samples with a "spoon" on the end of a 4" PVC pipe, GPS coordinates, pan out sample. This in all to find the best spots to go this summer. Later Dan

  
peluk
00:45:58 Sun
Dec 6 2009

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Re: "Goldgrabber"pans-from Alan Trees

My guess would be that the torque necessary to sample with a plastic pipe would crack it.A rock or rocks would make sampling impossible with either hand or power equipment.

This project would have to be done in a light shelter on skids if attempted.That would mean the tube would have to be jointed unless the tube was just a section on the end of jointed aluminum or steel rods.

When would you hope to start, Dan?

  
Zooka
00:54:14 Sun
Dec 6 2009

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Re: "Goldgrabber"pans-from Alan Trees

Dan, sounds like you need to look at Trev NZ's method of mining beach sands in relative indolence and glory. He used gravel pumps, and had a live jet on the head of a suction nozzle, it would eat its way to bedrock mighty quick as the live jet fluidized the sand around it and sank like a stone to bedrock unless held up by planks.
Hard to get a meaningful sample though, it was certainly not an accurate system unless you go by the "P Factor" - you run a bunch of material, check the sluices for gold, see a golden trail, and say :
"that ought to be Plenty"...
-Z
[1 edits; Last edit by Zooka at 00:55:02 Sun Dec 6 2009]

  
Danfromny
21:56:09 Mon
Dec 7 2009

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Re: "Goldgrabber"pans-from Alan Trees

Sampling would be done around Iditarod time ,Mid to Late March while the ice is still frozen and lights starting to come back out. The making of a sampling "spoon" to just pick up small amounts of material from the bottom, I dont want to go more than a foot deep into whatever type material is down there. Im working on a hand vacuum type deal something like the crevice PVC tool thats been available for years. Yes hitting rock means something too. as well as hitting spots with nothing but sand. Thanks for the pointers, Dan

  
Danfromny
20:56:17 Mon
Dec 21 2009

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Re: "Goldgrabber"pans-from Alan Trees


  
Danfromny
20:59:59 Mon
Dec 21 2009

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Re: "Goldgrabber"pans-from Alan Trees


  
Geo_Jim
07:57:51 Thu
Dec 31 2009

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Re: "Goldgrabber"pans-from Alan Trees

Dan, do you still have these pans for sale? What are their approximate dimensions?
Geo Jim

  

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