Dec2012 A casual couple of hours shovelling. For Rick and Matt a first time experiance. I included 2 clips to show where the riffle box really belongs. 'Technical': (Bearing in mind, to me it is all just an enjoyable doodling hobby.) All made out of scrap from around the workshop. Sluice box: 900mm long, made out of roofing-iron grade flat; Riffles 127*22*22mm with 30mm gap; Sides 100mm high, allow 10mls to turn over at the top. The other Plaything: First that sluice box really works. I keep panning the tailings; 'no' gold. Anyway it is so easy to dig a couple of shovelfuls near the end and put it through again at the end of a run. Of course its efficiency is governed by the art of getting the angle right for the boiling effect between the riffles. The size of it was designed to cater for a 5 HP driven pump * 2 inch lay flat hose * ¾ inch jet nozzle to be washed over the 3/8 inch punch plate (from a log fire flue protector). The outlet pipe under the screen into the riffle box has a '1/2 baffle' to cater for the surge.
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