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Additional Pictures 

 

The boxy design of the Sanyo ICC-0081.

It is heavy but still portable. To us it looks very similar to Sanyo's transistor radios.

The rechargable NiCd batteries and the amber glowing display..

The calculator brain with four Sanyo chips (manufactured under license of General Instruments Corp.)
and the discrete display drivers.
Please notice the different date codes of the 4 chips: 
The LM8001 and LM8002 were manufactured early in 1971, the LM8003 and LM8005 later that year. 
The backside of the printed circuit boards gives an easy explanation: They were replaced end of 1971.

The display board of the ICC-0081 with 8 single gas-discharge tubes.


If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, October 9, 2002. No reprints without written permission.