Texas Instruments TI-1798

Date of introduction:  1986 Display technology:  LCD
New price:   Display size:  10
Size:  4.7" x 5.0" x 0.80"
 120 x 128 x 20 mm3
Weight:  3.9 ounces, 105 grams Serial No:  
Batteries:  LR41 + LR1130 (30A) Date of manufacture:  mth 01 year 1985
AC-Adapter:   Origin of manufacture:  Taiwan (C)
Precision:  10 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Texas Instruments introduced in the United States with the BA-20 a very useful calculator. Beside the basic calculator functions 6 additional keys enable the COST, SELL, MARGIN calculations. You enter either two of the variables and get instantly the result of the remaining value. 

TI-1798_1_PCB.jpg (99038 Byte)Both the housing and the clock module were used with this TI-1798 and its European sibbling TI-610.

Please notice the  designation on the printed circuit board (PCB), a hint that leads into the search of a TI-1796 calculator still missing in the collection.

+++ Update April 2011: Fellow collector Michel Zwawiak provided the Datamath Calculator Museum a TI-1796 calculator. Thanks! +++

The next generation of the TI-1798 looks completely different.

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If you have additions to the above article please email:

Joerg Woerner, April 12, 2005. No reprints without written permission.