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Texas Instruments BA-II (Italy)

Date of introduction:  1985 Display technology:  LCD
New price:   Display size:  8 (5 + 2)
Size:  5.3" x 2.8" x 0.45"
 135 x 70 x 11 mm3
   
Weight:  2.3 ounces, 64 grams Serial No:  
Batteries:  2*LR44 Date of manufacture:  wk 48 year 1989
AC-Adapter:   Origin of manufacture:  Italy
Precision:  11 Integrated circuits:  TP0322
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The production of the original BA-II was shifted in 1985 from Taiwan to Italy and USA but the overall appearance kept very similar.

Main difference between these calculator pairs is their origin and internal construction:

Model Origin Introduction PCB construction
TI-30 III Taiwan year 1984 rigid PCB
TI-35 II Taiwan year 1984 rigid PCB
BA-II Taiwan year 1984 rigid PCB
BA-35 Taiwan year 1984 rigid PCB
TI-30 III USA, Italy year 1985 flexible PCB
TI-35 II USA, Italy year 1985 flexible PCB
BA-II USA, Italy year 1985 flexible PCB
BA-35 USA, Italy year 1985 flexible PCB

TI-BAIIN_Detail.jpg (28701 Byte)TI-BAIIN_1_Detail.jpg (31925 Byte)Even the display frame of the BA-II siblings is different, just compare the position of the thin lines above and below the window. (Left picture shows original design).

TI-BAIIN_PCB.jpg (61965 Byte)TI-BAIIN_1_PCB.jpg (52870 Byte)The internal construction of the two calculators is completely different, the original design (left side) uses a rigid printed circuit board (PCB) with a solid metal frame for the LC-display and a conventional battery holder. The later design manufactured in Italy uses a flexible board with a clamp to contact the display and batteries. We know this type of construction from a long line of TI calculators. 



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

Joerg Woerner, December 5, 2001. No reprints without written permission.