Retired Tektronix engineering executive David Brown is constructing a working replica of Raymond Scott's sequencer invention, The Circle Machine. “I thought it would be fun to build something with motors and lamps," Mr. Brown says. "The only information I have is the picture on the Raymond Scott site. I used a Hammond vibrato scanner base as the base for the Circle Machine and mounted it on a plate with 16 potentiometers around it. I only have 8 lamps installed but I have it playing an octave scale. I’m not sure how practical it is but it’s kind of fun to watch."