Híradástechnika PTK-1072-1
Brief History
After the success of the first programmable calculator (PTK-1023 in 1976), there was a need for a more complex and precise programmable model. This was
the PTK-1072 in 1978, which was manufactured by Commodore for OEM purposes too. The first series made with black squared housing.
Due to supply problems this type was replaced with the almost identical APF Mark 90 (as PTK-1072-1) in 1979. APF was produced
a non-programmable version of this machine (Mark 56), this model became the TK-1072-1. Interestingly, in 1980 the original Commodore model was in production again with two different housing (brown squared and the original Commodore's rounded-shape).
| Manufacturer: | Híradástechnika Szövetkezet (Hungary) |
| OEM: | APF Electronics, Inc. (USA) |
| OEM model: | Mark 90 |
| Mfg. date: | 1979 |
| Size: | 7,8×15,2×3 cm |
| Weight (ready for operate): | 205 g |
| Price: | HUF 7.000 (HT, 1979) |
| Type: | programmable scientific |
| Capacity: | 8/8+2 digits (input/display) 9/9+2 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | MOS MPS7530 201 |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 4 bracket (with saving the pending operation) 10 memory (with aritmetic) |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (0-7) Sciscientific (exponential) notation Engengineering notation Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) hyphyperbolic functions (sinh, cosh, tanh and inverses: ar sinh, ar cosh, ar tanh) DMS-DDconversion of decimal and sexagesimal numbers logexponential and logarithmical functions (10- and e-base) yxraising to power SDone variable statistics: calculating mean and standard deviation LRtwo-variable statistics: linear regression nCrprobability calculations P-Rconverting coordinates between rectangular and polar systems n!factorial |
| Display: | 8+2+2 digit LED (HP) |
| Power: | 3×AA NiCd rechargeable battery (built-in) chargeable with E-05DPj adaptor |
| Programming method: | keystroke-programmable |
| Program capacity: | 72 keystrokes |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.08726889 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.006559827E-70 |
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