Ode Coyote wrote: > At 10:38 AM 3/16/2006 -0500, you wrote: > > >Ode Coyote wrote: > > > > > Resistance type bulbs will run on DC just fine..and last longer as DC > > > eliminates filament wiggle from rapid heating and cooling while AC changes > > > phases. > > > [Put on a pair of dark sunglasses and watch an unfrosted light bulb to > > > see it.] > > > > > > You'll need something like a 5 amp/ 200 volt rectifier bridge. > > > > > > Due to a steady state voltage, a 300 watt bulb might draw a few more watts > > > and output a bit more light running on DC??? > > > > > > Ode > > > >You have to put a filter capacitor on it to get DC. With a full wave > >bridge you > >get pulsating DC, and the effect on the filiment will be no different than > >AC. > >The reason is that the filament turns attract each other when current > >flows, so > >the filament tends to want to pull together during the highest current part > >of > >the cycle. The direction of the current is irrelevent. But if you add a > >big cap > >to make it truely DC, then the vibration will disappear. > > > >Marshall > > Sure, rectifier ... and a cap. > Many filaments don't have coils to attract to each other and they still > wiggle. > Expansion and contraction. [not that coils won't attract] > Ode
If there is no coil, then the action is likely with the earth's magnetic field. In that case, rectification, even without a cap, should decrease the vibration, and double it's frequency. Marshall -- The Silver List is a moderated forum for discussing Colloidal Silver. Instructions for unsubscribing are posted at: http://silverlist.org To post, address your message to: silver-list@eskimo.com Address Off-Topic messages to: silver-off-topic-l...@eskimo.com The Silver List and Off Topic List archives are currently down... List maintainer: Mike Devour <mdev...@eskimo.com>
