DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
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 |
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| 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 |
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).
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.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.