Shaun Clayton wrote: > > I built Bruce's pulsed DC CS generator, but am not getting the right voltage > out of it. I had to substitute a 1/2 watt 68 ohm resistor for the 1/4 watt > 75 ohm resistor. My power supply is 12 volts (max setting) with a 100/300 > ohm select switch. The input to the circuit is 15.4 volts and the output is > 7.6 volts when the switch is set at 300 ohm. 7.4 volts when 100 ohm is > selected. The unit is operating at a little over 18 kHz. Could my > substitutions be the problem? Any thoughts Bruce? > > Thanks much, > Shaun Clayton >
Your generator may in fact be producing a ~15 volt pulsed DC square wave, but most measurement instruments *average the reading* over their measurement period. If the square wave duty cycle was exactly 50%, then an oscilloscope would show a pulse of, let's say, ~14.8 volts half of the time, and 0 volts half of the time. Your DMM will read 7.4 volts, or 50% of the actual pulse's peak voltage. When monitoring current flow through the generator, the meter reading of 8mA is again an averaged reading, and what I go by to determine the end point cutoff for my batches. There's actually brief pulses of ~16mA, on 50% of the time, off 50% of the time. For those who are interested in the theory as to why pulsed DC may help avoid undesirable 'sludge mechanical bridging' between closely spaced electrodes, you'll find an extensive explaination on the CS pages at "The Alternate Health Approaches Forum" http://web.idirect.com/~showcase/althealth/csilver along with the project to build the pulsed DC CS generator / Zapper circuit in a no-solder approach, using an 'Experimentor's Socket' and parts commonly available from Radio Shack or mail order electronics houses. Be Well! Bruce -- 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: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] List maintainer: Mike Devour <[email protected]>
