Ole Bob you are a genius!
I finally got a larger piece (20 gage sheet - 3 ounces) of silver ($70
;-( and my own cheap Harbor Freight Tools current meter ($5.00 ;-) and
tried out my first cell with the wide anode and narrow cathode. The
sheet anode is 6" x 3" and the cathode was a piece of 12 gage copper
wire about 6" long. I had 5.5 inches of the anode in the distilled
water. Incidentally, I made 32 ounces, 1 quart, and the bottle was way
too small for the anode but I made it anyway. I brewed it for 1.25
hours and stopped with the current at 13.25 ma (@33.8 VDC). This comes
out to about 6.625 ma for 1 hour if you average it out roughly. Rule of
thumb calculation gives about 28 ppm liberated silver, and PWT says 27.8
uS. I normally get about 22uS. The current line on the graph was still
going straight (not bending to the right) but I stopped it anyway
because of the PWT reading. There was some dark buildup on the cathode
and it turned silver from plating, but the residue didn't seem excessive
compared to the 1 ma current controlled same size anode/cathode system I
usually use. The Tyndall was very minimal, can't see it in normal light
and appears about 1/4 (subjectively) of what I normally get. This has a
slight tint to it.
I know that this first attempt was very sloppy, but I was surprised at
the speed of the brew, the high PWT reading, and the low Tyndall.
Dan
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