Híradástechnika K-831 (3. változat)
Rövid története
At the Budapest International Fair '73 there were announced three types of the new hungarian pocket calculator family licensed from Bowmar/ALI Inc.
canadian subsidiary: the smallest model (K-81) had been replaced by the newer MX50 model (K-831). The housing was similar, but the Rockwell chip used
made this calculator a very different model. The K-831 uses arithmetic logic but with separate equal key for calculating product or quotient, makes the
constant switch unnecessary. Instead of this this calculator has the feature to calculate percentages. The earlier series has entirely black housing ,
but the newer ones have silver elements.
| Manufacturer: | Híradástechnika Szövetkezet (Hungary) |
| OEM: | Bowmar-Ali Inc. https://www.newswissrolex.me/ (USA) |
| OEM model: | MX-50 |
| Mfg. date: | 1974 |
| Size: | 7,7×14,8×3,3 cm |
| Weight (ready for operate): | 190 g |
| Price: | HUF 9.000 (HT, MIGÉRT, 1974) |
| Type: | four-function |
| Capacity: | 8 digits (input/display) 8 digits (internal precision) |
| Operating logic: | semi-arithmetic (Rockwell) |
| CPU: | Rockwell 15332PD |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) |
| Features: | %calculation with percent Ffloating-point notation |
| Display: | 8+1 digit LED |
| Power: | 3×AA NiCd rechargeable battery (built-in) with E-69 charger |
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