I use 12 ga. wire, 12 inches long and put 2 of them connected to the
anode. That gives me 24 inches. The rods don't have to be a continuous
length as long as you have them connected properly.
I don't use the LM117, I use a regulator that I made using the LM334Z
with a 30 VDC power supply that I robbed from an unused printer that I
have.. My current limiter limits the current to 3.4 mA.
I don't see why you feel that you need 40 inches of wire, I make 15 to
20 PPM CS in about 24 hours at 3.4 mA. If I were to use 20 mA I would
produce my CS much faster, and am not sure that is good to make it that
fast.
Jim
Mike Monett wrote:
Re: CS>Attaching 12 gage silver wire electrodes to container lid
From: Jim
Date: Wed, 7 May 2003 04:50:49
> I make a gallon at a time and use current limiting set at 3.4 mA
> and it takes about 24 hours for 15 PPM CS. The generator that you
> speak of uses current limiting set at 20 mA so it should be much
> quicker.
> Jim
Jim,
With a current of 20 mA, and a current density to 1mA sq. inch, the
anode would require 20 inches of 12 ga. wire. The cathode requires
at least the same. How are you going to stuff 40 inches of wire in
that small container?
Also, the 7805 is a 5V regulator and requires 7V to operate. The
LM117 only needs 3V, so it would provide more voltage to the rods.
But it has a minimum load current of 5mA. This means the anode and
cathode each have 5 inches of wetted length, which is much more
reasonable.
The only problem remaining is the maximum output voltage of 37V.
This puts the system on the exponential part of the current-vs-time
curve, so the results would be subject to the normal process
variations of purity of the distilled water, ion channel formation,
and hydrogen bubbles forming at the cathode. Same old problems.
Best Regards,
Mike Monett
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