To run lots of material through such devices is not suitable for my 24 volt pump. I need to make up my mind what I want to do: suck up and process a ton of gravel or suck out the crevices? As with the infinity jets, I made several with different properties.įield test.no gold but plenty of gravel. Not knowing better, I used 3 types of matting to (hopefully) catch the gold. The riffles are designed to be pulled out for cleaning when in operation. Putting riffles into a round pipe is a bit of a problem and I ended up with a double story gold separator, or so to speak. Once satisfied with the suction, it was time to design an underwater operated sluice box, just like the original but smaller. 45 decree intake, 90 degree intake.anything.
I also experimented with the infinity chamber size, length and made adjustable ones. Once I figured out the building principle with the available material, I build them in in all sizes to find the smallest and largest design suitable for my 24 V pump. I am just used to hit the nail with the first blow, but not here.īeer and Mr Google came to the rescue, and the above picture is my first working infinity jet. I build half a dozen prototypes and none worked, to my frustration. I settled for an infinity, just could not get a workable venturi going. My first task was to build a functional venturi or infinity jet.
This 1 km stretch of river has been heavily prospected. The gold source is about 300 meters upstream from the hills. Most gold is in rather shallow water, deep inside the thousands of crevices. The stainless steel nozzle supplied with the AP dredge was too bulky for my intended area. Li-polymer 20 AH 29.6V batteries in waterproof 3m deep and hard proof box. Next I resolved to use the pump and battery and build my own from PVC pipes.ĭC 36Volts/16A, 300 L/min heavy-duty pump (4700 gal/min) with fuse protection Not claiming I can build a better one, I tried to make modifications first, still no good. While it does suck, it jams up the box with gravel and just won't work. I bought this AP underwater gold dregde from Down Under and tested in the local (Taiwan) river with dismal result.
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