Reid, your problem is that you are not an electrical engineer, and hence are having difficulty undeerstanding the problem. so I will asttempt to provide the missing data. Some things you will have to take on faith.
You are puzzled about 109 volts dropping to 82 volts and the current going from 15 to 55 ma. What you have is a "constant voltage system" that does not have sufficient "stiffness" to deliver the current that your cell is demanding. The voltage drop is due to inadequate wire size in the transformer. If your transformer had enough "beef" the voltage would have stayed at 109 volts even as the current increased. It sounds like your transformer has less than a 100 va rating. In a "constant current system" set to regulate at 5 ma.the voltage will stay at about the no load value i.e. say 36 volts as the current increases from 0.20 ma to about 3 ma. then the voltage will start to drop as the current increases. When the current hits the 5 ma. set limit the voltage will be about 5 to 8 volts and will stay at that level and the current will stay at 5 ma. Hence the name "constant current." Realize that when inadequate parts are put together all kinds of screwy results can and do happen. The amazing thing is that inspite of all of the "shade tree" engineering or lack of it, people make good CS. I happen to be a retired registered professional engineer witth degrees in electronics and power, so I tend to look at things with a different eye. I hope this clears up things for you. "Ole Bob" Reid Harvey wrote: > Ole Bob, > Thanks for helping me along with my understanding on this (and to Trem > for straightening out the current vs. voltage situation). But are you > saying that the two alternative approachs offer either a limitation on > current by voltage or the other way round, a limitation on voltage by > current? When you indicate the final voltage reading will go down it > appears this system is not constant at all. > > In view of the two constant systems I'm a bit puzzled that when last I > brewed CS neither the voltage nor the current remained constant. (N.B. > It has proven fortuitous that for both of the two types of generators I > use, for dilute and for concentrated CS, optimal results were achieved > in the first times used, all variables at what they should have been, so > I didn't see the problems that could come up until after achieving good > results.) I'm now puzzled because the last time I brewed CS I had inital > voltage of 109, with a final reading of 82 volts. Current initially was > 15mA, the final reading 55mA, so neither current nor voltage remained > constant. Why then are they referred to as constant systems? Or should > they be referred to as a current limiting system and a voltage limiting > system? > > I should also say, by way of knowing that on this last occasion the CS > I ended up with was by no means optimal that I was aware the water was a > bit impure. This appears to have been primarily due to contamination in > transport because of the wrong kind of plastic lid. (I have since made > gaskets out of the sides of a clorox bottle.) And I was compelled to > let the generator go longer than it should have because the electrodes > were initially too close to the glass and I was making a lot of silver > oxide, not ions. So I had initial current of 15mA and final current of > 55mA. Clearly I got large particle size CS, but not to worry since I > know how to get it all right next time. > > Now I am merely a bit puzzled by your assertion that either the current > or the voltage should remain constant. And I assume you meant that I > would get a final reading of 80 volts, and not the 8 volts you > mentioned. As usual I'm learning a lot from what you're saying, swo > nothing negative is intended in my comments. > Thanks again. > Reid > > Ole Bob wrote: > Hi Reid, > The two low voltage systems are; > 1.) Constant voltage like using several 9 volt batteries snapped to > gether and connected to the silver in the brew cell. the voltage across > the cell stays at constant value of the batteries. > > 2.) Constant current is were there is an electronic regulator in one of > the wires to the cell that senses the cell current and when it > approaches that limit, the internal electronics places a variable > resistance in circuit so that the current cannot exceed the pre-set > value. In this system the voltage across the cell drops to hold the > current at the pre-set value. > > Since you are using 110 volts D.C. then you must be using a constant > current mode. > > If you have a volt meter then the next time you make a run connect the > voltmeter across the silver electrodes. Set the meter to read a voltage > higher than 110 v. As the brew progress the volage will stay about > constant for a while and then start to drop. I would guess that its > final value will be about 8 to 10 volts. > > "Ole Bob" > > -- > 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 > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > List maintainer: Mike Devour <mdev...@eskimo.com>
