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Additional Pictures 

 

This Radio Shack EC-497 was manufactured in June 1979 by
Texas Instruments in Abilene, TX (Date code ATA 2579 » wk 25 yr 1979).

 
The flexible printed circuit board (PCB) of the Radio Shack EC-497.

The TO0321 single-chip calculator circuit known from the TI-50.


horizontal rule

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

© Joerg Woerner, May 29, 2016. No reprints without written permission.