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Additional Pictures 

 

The boxy design of the Sanyo ICC-0081.

It is heavy but still portable. Looks similar to Sanyo's transistor radios.

The rechargable NiCd batteries.

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

The calculator brain assembled 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. 
The backside of the printed circuit boards gives a explanation: They were exchanged end of 1971.


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

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