DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Canon F-61
| Date of introduction: | year 1977 | Display technology: | Fluorescent |
| New price: | Display size: | 8 + 2 | |
| Size: | 5.9" x 3.2" x 1.1" | ||
| Weight: | 6.2 ounces | Serial No: | 836290 |
| Batteries: | 4*AA | Date of manufacture: | year 1977 |
| AC-Adapter: | Origin of manufacture: | Japan | |
| Precision: | 8 | Integrated circuits: | NEC uPD955C |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
The Palmtronic
F-61 is another calculator manufactured by Canon missing
a calculator chip from Texas Instruments. The brain of the F-61 is a NEC uPD955C
chip, obviously an enhanced version of the uPD951C found in the F-51.
Running Mike Sebastian's "Calculator forensics" gives an unacceptable bad result of 9.2079408 instead the expected value close to 9.0000. This places the F-61 in the league of boring calculators like the Canon F-6 (12.199423) and Rockwell 61R (10.4328).
The other calculators in the early scientific line are the F-31, F-41, F-51 and the F-71.
Within one year Canon introduced much sleeker calculators with
LC-Displays, don't miss the F-52 and F-62
sibblings.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, March 27, 2003. No reprints without written permission.