Hi Trem,
You write:
> The first thing that comes to mind is that you don't want buildup on the
> cathode(s). The easiest way to prevent that is to use polarity reversal. I
> use 30 second periods with our SG7 but arrived at that number empirically
> and of course I'm using very close electrode spacing (1/2 inch) and vigorous
> water circulation so I haven't a clue what time period to use with no
> circulation. Reversing polarity will give you some stirring effect in dead
> water so you will get double benefit that way.
One list member replied privately that the cathodes seem to stay clean
at these low currents, at least for a good while. I'll have to see how
it goes. Worst case is they do need 'dusting off' from time to time.
Reversing them once in a while to clean them off would work, and add
the stirring effect you mention. Keep the duty cycle low enough and the
wires really wouldn't contribute much to the brew and would last
forever. It'd grossly complicate the circuitry, however, which right
now consists of one componant besides the battery.
> Of course you'll need to use a different cathode setup and increase the
> surface area. Why not use three coins? They are pretty inexpensive.
Yeah, a Silver Eagle is just a bit over the spot price usually. I
recall this one being somewhere around 4-6 bucks, and, of course,
should last about 3 lifetimes.
> Are you planning to use a series resistor for current limiting or an actual
> regulator?
I'm using current limiting diodes as recommended by Steve here:
http://escribe.com/health/thesilverlist/m54654.html
Bought some from Mouser Electronics. Cute little beastie!
I'm waiting for Ole Bob to chime in. I vaguely recall something he
brought up about dissimilar electrode areas a while ago... Have to go
try to dig it out of the archives.
Be well,
Mike D.
[Mike Devour, Citizen, Patriot, Libertarian]
[[email protected] ]
[Speaking only for myself... ]
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