I read that the 40 mA bulb was used to limit the current to 40 mA maximum -- and lower currents would be desirable, (if smaller bulbs were available) to minimize colloidal particle size.
George's current is no where near 40 mA, and the results seem to be compromised or questionable, already (at 36 vdc). Does anyone know how to design a 5 mA current regulator ? (Any references or ideas appreciated.) Or, could one use 6 vdc, and keep a batch running 24 hours a day (in a dark place) ? --Bill At 10:10 AM 7-13-98 -5, Mike D. wrote: > >On 13 Jul 98 at 22:15, George Martin wrote: > >> When the current read 8.0 - 10.0 ma >> I noticed something different occur. In addition to the CS >> 'floating' around in the vicinity of the electrodes there was >> also a rather thick 'stream' of CS that was sinking to the >> bottom of the container. > >Hello George, > >Excellent set of observations. Your setup is very similar to mine. >I see the same effect at about the same current. > >I wonder if those are larger particles. A long time ago Rose used a >microscope at work to look at some CS I made that was run for a long >time (different apparatus and recipe than I'm using now). She saw >much larger particles mixed with the almost invisible smaller ones. > >Above a certain current, some people have talked about "burning" the >silver particles. I doubt that's a proper description, but it conveys >the notion that the particles made are different. > >So it makes sense to try current limiting at something below that at >which the descending cloud of darker particles is seen. That's what I >would try. > >I've long thought that current limiting schemes of various sort would >emerge as the best strategy once we start to really study the >process. I've also wondered if there is a calculable property that >would let you predict that threshold level, such as current density >(current flow vs. surface area of electrodes). You're welcome to try >the experiments. > >Be well, > >Mike D. > -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: silver-list-requ...@eskimo.com -or- silver-digest-requ...@eskimo.com with the word subscribe or unsubscribe in the subject: line. To post, address your message to: silver-list@eskimo.com List maintainer: Mike Devour <mdev...@id.net>
