New Stuff
Author
Links
Guest book
Web-log
Bric-a-brac
Calculators
Components
Ephemera
Events
Glossary
History
Hit or Miss
Radios
Transport
Valves
Wanted
Metal Puzzles
Caravan
Calculators: Handheld: Sanyo CX-8131 Memory Calculator
|
|
|
Size (approx): | 80mm x
150mm x 18mm (max) (w,h,d) Weight 134g excluding batteries |
|
Power: |
3V DC, 2 x AA size batteries, 0.3W. Does accept an adapter (2.7V DC, Ref. No. CU-15) through socket on the top side to the far right. | ||
| Case: | Two-piece case is black base and silver spray painted top with a black matt keyboard surround. A light green display filter lets in a bit too much ambient light but does have printed numbers showing the digits. A small plastic panel with logo is inset at the top and printed silver. Bold coloured keys are squishy but quite positive to use. | ||
| Display: | 8 digit green VFD with a ninth digit for minus and memory signs and error flags | ||
| Features: | Standard four functions, percentages, change sign, square root and three function memory | ||
| Age: | est 1974/5 from the large component count where even the capacitors are Sanyo! | ||
| Manufacturer: | Sanyo Electric Co., Ltd. Serial No. 09003681 T, made in Japan. | ||
|
Comments:
|
Really lovely! Solid feeling calculator that is surprisingly good condition; the silver has not worn at all on this example. Square shaped black soft plastic case is open topped. Display is a little difficult to read as the filter lets in all the light. Cannot find any info on the web about this one - rare? |
| Components: | 1 x cpu: NEC µPD277C H57189
28 pin DIL 1 x nine digit flat faced VFD display 3 x transistors 7 x diodes 9 x capacitors 26 x resistors 1 x transformer |
| Boards: | The keyboard board (Ref FIR8) is fixed to the front with 5 screws and attached to the CPU board by a 8 tied cables. |
| Construction: | Remove the screw at the back. Prize away the bottom first (two lugs) and you'll find the top section lifts off. |
| Logic comments: | (C) is actually a (CE/C) key, i.e. used once to cancel the last number entered and a second time to clear the whole calculator. |
| There is automatic constant on only two functions, multiply and divide | |
| Input overflow is suppressed, inputting a ninth digit is ignored | |
| Negative sign is shown in the far left (ninth) digit thereby allowing full eight digit negative numbers | |
| Divide by zero shows zero and "C" in the far left (ninth) digit and is not recoverable | |
| Overflow is shown by "C" (or "E" if negative) in the far left (ninth) digit and is not recoverable | |
| Memory storage is indicated using the far left (ninth) digit’s decimal point | |
| Negative square roots are not allowed and result in "C" and zero display |
