alloy2 
I have been looking hard at these tables.
Part of what I am saving up is silicon chips, flatpacks, thru hole, plug ins and the 'j' legged eproms for incineration and the Gold/Copper leg recovery. Also the power transistors which I find out have Gold wire connections too.
Since I have a lot of this saved up, and returns seem to be about 0.6-0.7gms per Lb.
I have a good amount of Gold there.... Ounce plus... :-)
And since I have about 200kg of plastic coated Copper wire, selling or burning is my only option, till the shaker table and a homebuilt chopper would give me the chance to get #2 price with a clean process and over 99% recovery of Copper.
My yard only pays the lowest return % for plastic coated wire.
And 50kg of my wire is the 4 x2 strand telephone wire with no outer cover = 85% return...
My quick question is, are the riffles tapered in height towards the end?
I am thinking that 'baby corrugated iron' could be used as the riffle board if its not nessesary to taper them.
Everything else seems pretty easy, I have lots of time to build one, its a investment in that time too.
A couple of days ago my neighbours son popped over to ask me about 'making a home built casting furnace' for melting Ali.
He had a mid 70's book with some rough details in it.
I pointed out some stuff for him, like we cannot get the cement here, crucibles are far too expensive here and his size ideas a bit too small.
And it will not melt Cast Iron..
But, I dragged out a diesel furnace burner/blower I have, showed him some gas bottles for casting in, mentioned using kittylitter & sand & cement, along with some refractory insulation as cement and recycling cast Ali as Ali for casting.
So I think we could make one between us. And I can use it to incinerate silicon chips....
He can do the actual physical work and I supply parts and ideas, nice deal.
I gotta say alloy2, without the shaker table idea, it'd be a used gas bottle as curcible on gas hob and Gold pan the wires out....by hand.
Using a shaker table would be perfect for Gold mining in our areas too, there's no 'claims' for hobby panning/mining here, just free areas to do it in and a 'environmental' guide to follow.
Hobby mining is about a Ounce a week and less...per person. NZ$1300 a Oz?
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