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Additional Pictures 

 

The sticker on the backside of the SR-40 with an impressive
serial number: 001P or 1st Prototype. 

The printed circuit board (PCB) of the SR-40 is similar to the later SR-16 II. 
Please notice the different arrangement of the battery contacts, 
the TMS1111 using a socket and the small coil of the power supply. 

The display of the SR-40 with a standard 14 digit stripe known from the SR-50A. 


horizontal rule

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

Bob Patton and Joerg Woerner, February 18, 2003. No reprints without written permission.