EX-Z3
ƒ/2.6
5.8 mm
1/50
some marketing from the manual of this 1964 analog computer…. with some patch panel wiring, it can solve various differential equations.
6 responses to “Analog Computer”
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SYLVANIA Color Television Picture Tube Development …
I used one of the to create a colorimeter in 1965-66, including training at EAI headquarters. We worked with Bournes (helipot) to have unique wire-wound pots produced to create the eye sensitivity curves. These pots were motor driven in sync with a rotating grating specrtroradiometer to generate the R, G, B functions. With integration (also on this analog computer), we we able to derive color phosphor coordinations on the CIE curve. -
Pots are potentiometers (variable resistors). These "Helipots" were constructed with precision helically wound resistance wire, able to achieve extreme resolution necessary to simulate the function of the unique red, green, and blue color eye sensitivity curves. As the potentiometer shaft was rotated, a non-linear resistance response curve was generated. This became the multiplication function of the analog computer operational amplifier. The "curves" were achieved by custom "tapping" of the potentiometer coils and connecting these short sections in series and parallel to achieve the desired function. This custom tapping was a labor-intensive process, and a fine example of American ingenuity on the part of the Bournes Company. Questions to DLSno1@aol.com
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