12vDC 1.5" Dredge

Has anyone on here made one of these?

I'm planning to make one but I have a question before I get started.

My pla is to use 2 bilge pumps for this and have 1 run the suction nozzel and the other working a power jet.

Hose eill be 1.5 or 2 inches and the hose feeding the suction nozzel probably be 3/4".

I'll also have a flush nozzel to use as needed.

So...using 1000 gph pumps will I be able to push the gravel for 15‘ along an almost straight line?  Minimal vertical lift is involved.

Thanks all...

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  • What pumps are you going to be running? a 220ah sounds a little big, even if your running two 20amp pumps continuous thats still 5.5 hours of run time.

  • I'm looking to make one this summer. I was thinking of a suction nozzle but a power jet may let you get into small places easier. But as cheap as the gold snare is would it be worth just getting one and modifying it. Plus is a 1-1.5" worth building?  

    I have looked at the Gold Snare videos Has anyone tried it in the field? 

    I was thinking of making something on the lines of a 1 to 1.5 unit like this and running the pump off 18v Ryobi battery's There light and give a good run time you would only need 3 for the day plus with a waterproof box you could do away with all wires. Making a nice little self contained unit. the Sluice is what I'm not comfortable with, can you get the fine gold with this design?

    •  Both Ed and I use both  the  SGS-1 and the SGS-2,  Both do a great job at what they are designed  for the 1" goldsnare is great for doing cracks and crevasses, sniping and testing and other things like making your dredge cons into super cons, the 2" is a two inch suction dredge that you put in a backpack and carry in you only need a one and a half inch pump to operate. https://youtu.be/mv2P4GUEo_Y

      '

    • If your pump is 12 volt the most you would want to run to it is 14.5 volt, a 12 volt pump running off of 18 volt may work but it wont work long.  what i use in the field is a little 10AH sealed lead acid battery http://www.amazon.com/dp/B00ENN4Q7S/ref=sr_ph?ie=UTF8&qid=14615...     and it will run the 1100gph pump for the GoldCube for about 4 hours.

       

      • Thanks for that link Don.

        Between that and your post I now have something solid to go on for battery power.

        Since I'm going to run 2 pumps I'll go with a little bigger battery.

        I found an AGM 220 ah that weighs 12 lbs. @ the auto parts store.  Cost $120.

        But I'm going to keep looking whle I build the nozzles and buy the hoses 1st.

        I'm hoping that by then I'll find a lighter one....an li maybe??

        Anyway...thanks again!

      • I have one I use for emptying the fish pond It has run fine for 2 times now I don't know how long it has run but it shows no singe of failing yet. But your right it is only rated for 12 v and 18v is pushing it, that was just what I had at the time. I did not think of that kind of battery I one of have those for the gate Hydraulics I can try out.

        I think I may just try and see how long the pump will last on the 18v just to see the pump is already rigged to an old Ryobi flash light Handle. I don't mind losing an old Harbor fright bilge pump. I have a lot of tinkering to do on this project there is no telling where it will end up.

        Thanks for the idea of the 10AH lead acid battery I may have to change my plans.  

  • Thanks guys.

    I have watched those already...along with every other electric dredge/sluice box video on yuotube.

    My design is significantly differentfrom others in that I plan to use a suction hose that's 15' from the box to the nozzle.  At some point (I'm guessing about 6' from the box I will put a Power Jet in the line.

    From what I understand this would almost triple the amount of suction and while helping the material to make it to the box.

    My plan is to use a seperate bilge pump on each line having a total amps of no more than 10.  Thiis would limit me to 1000gph pumps I believe.  

    On the suction nozzle the pump would be probably be mounted a foot or so in back of the nozzle and feed into the nozzle via a 3/4" line to create the suction.

    At first I'll probably feed it all into a standard sluice box while I complete the floats, etc.

    My biggest hold up right now is figuring out what is the most powerful, light weight, and yet affordable battery to run it.

    I'll be packing this thing itm 1 - 5 miles. So weight is critical.

  • Mike Pung pointed you  to the goldsnare. Ed Marvin and myself use the goldsnare it works great check out our team goldsnare videos on youtube.    https://youtu.be/mv2P4GUEo_Y 

  • https://www.youtube.com/watch?v=X_mFFvIMITo ; for a video on the Gold Snare

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