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Additional Pictures 

 

This SR-50 was manufactured in May 1975 by
Texas Instruments in the Netherlands (Date code 225 wk 22 yr 1975).

 

The printed circuit board (PCB) of the SR-50 is centered
around the TMC0501 / TMC0521 building blocks.

The additional PCB found inside the SR-50 with the display drivers,
the LED-display and the keyboard assembly for the keys.

The date code of the Integrated Circuits (IC's) indicating a
manufacturing date of week 16 in the year 1975.
 


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

Joerg Woerner, November 1, 2011. No reprints without written permission.