Never been to Lower Slobbovia but have visited Upper Slobbovia on a couple of occasions and its not a pretty place (they nailed me with the ugly tax both coming and going). If you believe the brochures they are the worlds leading manufacturer of muffler bearings and headlight oil.

So for the untrained ear what does the ballast resistor do exactly? Sounds like it reduces the voltage but does it do so at a fixed level or does it reduce it by a percentage of the input? Say you put Sal's ballast resistor on a 12 volt line would it reduce that to 9v? If I put the same resistor on a 40 volt line would it reduce that to 9v? Or some other voltage?

Thanks - Bruce