Texas Instruments TI-2500B Prototype

Date of introduction:  never Display technology:  LED-stick
New price:   Display size:  8
Size:  5.5" x 3.0" x 1.7"
 139 x 76 x 42 mm3
Weight:  6.7 ounces, 191 grams Serial No:  none
Batteries:  3*AA NiCd or 4*AA Alkaline Date of manufacture:  wk 42 year 1973
AC-Adapter:  AC9130 or AC9120 Origin of manufacture:  USA
Precision:   Integrated circuits:  TMS0119
Program steps:   Courtesy of:  Joerg Woerner

TI-2500-VX-PCB.jpg (66648 Byte)Before Texas Instruments replaced their own LED-modules with the Bowmar Opto-stick they manufactured some calculator prototypes. This early TI-2500B prototype is based on the TI-2500 Version 3 and used already in October, 1973 the Bowmar display.

Two month later the TI-2500B was introduced on the market. 

Please notice that the battery compartment of this calculator is missing the small groove to open it without damaging the nails. We noticed this flaw already with the TI-2510.

Datamath™ is a trademark of Texas Instruments.

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© Joerg Woerner, October 31, 2003. No reprints without written permission.