DATAMATH CALCULATOR MUSEUM
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|
|Program steps:||Courtesy of:||Joerg Woerner|
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.