Category:Tektronix

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These were plotted using a Tektronix graphics computer[1] sometime between 1975 and 1978 or so.

All of the designs are based on wide-interval samplings[2] of sine waves plotted in various different ways. This was a technique I discovered more or less by accident when I mistakenly had the trig functions set to "RAD" (radians) with a plotting program that was designed to work in degrees.

Footnotes

  1. I think the model number was something like 3017, though Wikipedia indicates that it was the 401x series which was active at that time -- so maybe it was 4017, 4016, 4015? I don't know if there are any photos... (Update: 4015 is starting to ring a bell, so I think that's what it probably was.)
  2. Feel free to ask me to explain what I mean by this.