On Mon, 17 Mar 2008 18:25:11 -0700 Jim Cathey <[EMAIL PROTECTED]> wrote:
> > I have a friend who is a wizard with lighting systems. He said > > that 410W MR16 lamp will put out as much light as that old 1000W > > _and_ have a built-in reflector. But it's 82V, not 120V. > > I thought a lot of these 82V lamps were like photoflood lamps, > rated 82V but to be run on normal wall voltage. Very bright, > very short life. > > > So my first thought was a transformer. But I'm not having much > > luck finding a 120V-82V 500VA transformer. > > A variac would do nicely as a transformer. But... > > > The "snag" is I don't know how the lighting dimmer is going to > > react to a half-wave rectified load. > > Dimmer? You can't put a transformer downstream of a > solid-state (chopper) dimmer. On the other hand, it > probably won't mind a diode cutting off half the cycles. > But see point 1 above. Actually, the DC component of feeding a transformer with a diode will likely saturate the magnetics and cause all sorts of problems. You could use a 24 V transformer and a 12 V transformer, both rated at 4 amps. Wire the primaries across the line and the secondaries in series with the light bulb, phased properly to buck the 120 V from the line down to 84 V (and measure it BEFORE you connect up the bulb!). Craig _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
