----- Original Message ----- From: Tom Parkhill <[email protected]> To: <[email protected]> Sent: Friday, 4 June 1999 03:08 Subject: RE: CS>yuck-o black stuff
> The black is caused (in my experience) from excessive current. Also, 36 > volts is on the high side. Try putting a 10kOhm series resistor with the 36 > volts. With a high impedance voltmeter across the electrodes, you should see > the voltage fall to 8-10 volts very soon. My constant current generator > starts with an open circuit voltage of 30 volts, quickly falls to 8-10 > volts, and finishes at 3-4 volts. At 10 MAmp, it takes only a few hours to > make a good batch. 2 mA takes 10-12 hours. TomP > Tom I agree, excessive current causes a dirty solution. However, your currents and times do not correlate with mine. Of course these factors depend upon electrode length, separation, water volume etc. My parameters are: electrodes 2mm, 45mm wetted depth, 45mm apart. 200mls d. water (7oz?). 30 volts, current limited to 0.75 mA Hot water - 1 hr = 8 - 10 ppm 12 volts (9 V AC adaptor, not current limited) Hot water - 1.5 hrs = 10 ppm rising to 15 after 24 hrs, final current 0.99 mA Cold water - 3.0 hrs = 10 ppm, 10 ppm next day, final current 0.59 mA Ivan -- 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]>
