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Calculators: Handheld: Victor 104R
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Size (approx): | 81mm x
155mm x 20-35mm (w,h,d) Weight g excluding batteries |
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Power: |
4.5V DC, 3 x AA size batteries. Accepts an adapter/charger (undefined ) through socket on the top side on the right. A warning note on the back says "If AC adaptor is used, batteries must be Ni-Cad AA type". | ||
| Case: | Solid two-piece case with the top in beige and the bottom in darker grey. It is wedged shaped with a more pronounced tilt towards the top. A neutral (and quite light) display filter gives a clear display. It is surrounded by a silver painted escutcheon that had not survived well on my example. It also has a raised Victor which was originally painted silver too. The keyboard area is surrounded by one large light gold brushed aluminium panel which sits in its own recess. It has some small printed black text around the power switch. They keys (somewhat reminiscent of Rockwell colours) are squishy and wobbly but work well enough. | ||
| Display: | 8 blue VFD display with a ninth digit for minus. memory and error indication. | ||
| Features: | Standard four functions, change sign, square root, reciprocal, squares, pi, percentages and four function memory. | ||
| Age: | 1977 | ||
| Manufacturer: | Made in Japan for Victor Comptometer Corporation, Chicago, Ill, USA. Serial number 7150574. | ||
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Comments:
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Quite well built American brand calculator from a small range that Victor did. They keys are somewhat reminiscent of Rockwell colours. The design appears to a bit old fashioned and bulky for this late date. The logic is sound with only negative square roots letting it down. |
| Components: | 1 x IC Texas TMS 1044NL 7710
(week 10 of 1977) 1 x 9 digit flat faced VFD display unit, 9ST-08 2 x transistors 3 x diodes 5 x capacitors 5 x resistors 1 x transformer Zebra DCT-33 |
| Boards: | The whole assembly sits loose in the case held by some plastic guides. The keyboard hovers above the main board (FH-015-1) assembly (connected by 15 strong copper wires connectors) whilst a third board (FH-015-D) holds the display components. |
| Construction: | Very difficult to open as the sides are held together with large lugs and the stiff thick plastic makes it difficult to lever them open. Not recommended. If you do, the front section will lift off. |
| Logic comments: | (CE) is used to cancel the last number entered and (C) to clear the whole calculator. |
| Input overflow is suppressed, inputting a ninth digit is ignored | |
| Negative numbers are shown with a minus in the far left (ninth) digit thereby allowing full eight digit negative numbers. | |
| There is automatic constant on all four functions | |
| Divide by zero shows a "C" in the far left (ninth) digit and is recoverable using (CE) | |
| Overflow shows the result and a "C" (or "E" if negative) in the far left (ninth) digit and is recoverable using (CE) | |
| Memory storage is indicated with an upper "n" in the far left (ninth) digit. | |
| Negative square roots are allowed | |
| The change sign key can be used in mid number entry |
