Hello Victoria, I suspect your readings will be about the same with or without CS in the water with your present setup. I think you would have better luck if you were to put the CDS at right angles to the laser beam and cenered on the CS container. That way you will get the scattered light that reflects off the silver, rather than the full beam which is only impeded a little bit by the silver in the water. I have done some experiments along this line using high intensity LED's and found the experiment to be more sensitive that way.
You also might try keeping the container with CS and the setup in a light tight box. It also helps to keep the CDS in a tube so the scattered light only comes at it from right angles and also through a straight tube. That also increases sensitivity. Another thing that increases sensitivity is to let the laser beam not strike anything on the far side of the container so it won't reflect any light back into the container. Or paint it black so as to absorb the light. That way, all you get on the CDS is scattered light. Hope this gives you more to think about and perhaps try. Trem ----- Original Message ----- From: Victoria Welch <[email protected]> To: Silver-List <[email protected]> Sent: Saturday, September 04, 1999 7:52 PM Subject: CS>Laser/cds preliminary testing... > Hello all, > > Well, I have done the priliminary pass on this thing and don't know > what to think. > > I've attached a JPG of the jig from my digital camera for your > perusal, I hope this is acceptable (sez she donning helment, flack > jacket and nomex drawers :). > > Below is what I shared with Ole Bob on the subject: > > The preliminary testing of the laser/cds jig do not encourage me. The > following is what data I did compile: > > Cullysprings DW (all batches so far use this), right out of the bottle: > 0.27 ohms > > Batch 9301, 10 second switch, IcO: 0.305 mA, Icf: 2.81 mA, Initial > resistance: 129 ohms, Final resistance: 43 ohms. Four hour run. This > also gave a 0.27 ohm reading off the cds. > > Batch 9302, 1 second switch, Ico: 0.439 mA, Icf: 1.051 mA, Initial > resistance: 261 ohms, Final resistance: 56 ohms. 5 hour run. This gave > a reading of 0.35 ohms. > > Batch 9401, 5 second switch, Ico: 0.419 mA, Icf: 3.01 mA, Initial > resistance: 194 ohms, Final resistance: 8 ohms. 3 hour 15 minute run. > THis gave a reading of 0.31 ohms. > > Initial and Final resistances were measured at one set of probes giving > about a minute for the readings to stabilize, used 2K scale. > > Positioning of the laser on the cds makes a difference. Not totally > sure about this yet, but the "center" of the cds somewhat wider than the > laser beam seems to remain stable. I had to beef up the jig to minimize > the movement caused when turning the laser on. > > Batch ???, this is a DC batch that I still have around - noticibly > yellowish. This was before I started keeping tags on the samples so no > other data is available. This one gave a reading of 0.33 ohms. > > Thoughts? > > Thanks & take care, Vikki. > -- > Victoria Welch, WV9K, DoD#-13, Net/Sys/WebAdmin SeaStar.org, > vikki.oz.net > "Walking on water and developing software to specification are > easy as long as both are frozen" - Edward V. Berard. > Do not unto others, that which you would not have others do unto you. ---------------------------------------------------------------------------- ---- -- 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]>
