If I recall correctly the bulb was used as a "done" indicator. It would start glowing around 8 mA and that mean that the CS was ready.
Marshall John Kolb wrote: > On Sat, 10 Nov 2001, I Anderson wrote: > > > Forget the bulb, it is not needed, and serves no useful purpose as far > > as I can see. > > You would need one that worked at 36+ volts anyway. > > There is a useful purpose, but hopefully not needed. If the rods > were to short together, there would be a large current drawn, > rapidly draining the battery. If there is a suitable voltage lamp > in series with one of the rods, the current would be limited to > that of the lamp rating and the light emmitted would be a warning > that a short existed. The lamps are a very low resistance compared > to the resistance of the DW and rods, so don't affect the brew time > or resulting CS characteristics. > > Looking through the Mouser catalog, for a 3 battery, 27 volt system, > the Chicago Minature # 6838, 28 Volts, 0.024 Amps (24 mA), Mouser > P/N 606-CM6838 $1.70 would be ideal. It has wire leads so a socket > is not required, and would limit current flow to 24 mA. Of course, > if a 28V lamp is used on a 36V system and a short occurs, the bulb > will be very bright for a short time, then fail. Two 18V 26 mA bulbs, > #7220 in series would work well for a 36 V system. > > > > > You could obtain 3 X 12V low mA bulbs and tie the legs together (three > > legs joined together X 2) but whether they would light at the <8mA > > that you would be using, I don't know. > > > Three legs tied together sounds like a parallel connection, not > series. With three 12V bulbs wired in parallel, the combination > would still light with 12V applied, but use 3 times the current. > Series connection is what's needed. > > Of course, those of us that never make mistooks and never let the > rods bump into each other don't need the light bulbs. > > John > > -- > 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] > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > List maintainer: Mike Devour <[email protected]>
