Original poster: Mddeming-at-aol-dot-com In a message dated 2/27/04 1:21:02 AM Eastern Standard Time, tesla-at-pupman-dot-com writes: Can anyone point me to a device that does not have a linear resistance but yet does not display a negative resistance? Is there such an animal? Thanx Luke Galyan A plain 100w lightbulb shows this nicely.. Matt D.