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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