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Sharp Compet 30 (CS-30A or CS-30B) Desktop Calculator

Sharp Compet 30 (CS-30A)
Image Courtesy Shinichiro Osaki

It appears that there were two versions of the Compet 30 developed and marketed, the CS-30A, and the CS-30B. At this time, it is not known what the differences were between the two versions. Both machines used static Nixie drive circuitry (not multiplexed), identical keyboard and Nixie display assemblies, and appear to be visually identical. Until an example of a Compet CS-30B can be found to compare with a CS-30A, the differences will likely remain a mystery. The museum is interested in acquiring either version of the Compet 30.

Sharp Compet 30 (CS-30A) Specifications

Manufacturer: Hayakawa Electric Co., Ltd. (Sharp)
Model Number: CS-30A (Compet 30)
Manufactured In: Japan
Date of Introduction: 1966
Display Technology: Nixie Tube, 14 Digits
Logic Technology: Discrete Diode-Transistor Logic
650 Transistors, 1600 Diodes
Digits of Capacity: 14
Decimal Modes: Fixed via keyboard pushbuttons
Math Functions: Four Function
Memories: One memory register
Performance: Addition/Subtraction: 15ms; Multiplication/Division: 150ms
Size: 17 1/4" wide, 18 3/4" deep, 8 1/2" high
Weight: 29 pounds
Power Consumption: 25 Watts
Copyright 1997-2008, Rick Bensene.