DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
MELCOR Model 380
| Date of introduction: | 1973 | Display technology: | LED Optostick |
| New price: | $100 | Display size: | 8 |
| Size: | 6.0" x 3.1 x 1.00" 152 x 80 x 25 mm3 |
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| Weight: | 5.0 ounces, 142 grams | Serial No: | 745888 |
| Batteries: | 9V | Date of manufacture: | mth 07 year 1974 |
| AC-Adapter: | Origin of manufacture: | USA | |
| Precision: | 8 | Integrated circuits: | MOS MCS2521 |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
If
we trace back the history of Melcor
we locate the rare Mariner NRC 7200 as starting point
of their calculator business. The NRC 7200 was introduced already in December 1971
and looks similar to the Bowmar 901B. Both
designs used mainly technology and components from Texas Instruments, e.g. the
calculator chip, keyboard, display drivers and even the display. In 1972 TI
started their manufacturing of calculators and consequently changed their
perspective for Bowmar and
Melcor from component manufacturing to competitor. As a logical result
a lot of "TI-free" calculators appeared. This Model 380 uses:
| • Keyboard technology from Ramsgate • A calculator chip from MOS Technology • A display manufactured by Bowmar • Display drivers made by ITT |
Compare
this assembly with a Bowmar MX55 and Sears
Digi·Matic 8.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, May 23, 2002. No reprints without written permission.