Híradástechnika TK-1024
Brief History
The previous model (TK-1023) was not able to meet the needs, so a professional scientific calculator was bought from National Semiconductor. The NSC 4640 was assembled in Balatonlelle factory,
and becomes one of the most reliable calculators of HT. The TK-1024 was produced from 1977 to 1978.
| Manufacturer: | Híradástechnika Szövetkezet (Hungary) |
| OEM: | National Semiconductor (USA) |
| OEM model: | NSC 4640 |
| Mfg. date: | 1977-78 |
| Size: | 8×15,5×3,2 cm |
| Weight (ready for operate): | n.a. |
| Price: | HUF 3.600 (HT, 1977) |
| Capacity: | 10/10+2 digits (input/display) 12/12+2 digits (internal precision) |
| Operating logic: | RPN |
| CPU: | NSC MM5782N (CPU/RAM) + MM5751DPHN vagy MM57136DZMN (ROM) |
| Registers: | 4 standard 3 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 (0-9) 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) 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 P-Rconverting coordinates between rectangular and polar systems n!factorial |
| Display: | 14 digit LED |
| Power: | 3×AA NiCd rechargeable battery (built-in) chargeable with E-05Dp adaptor |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 59.9999942989 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00687733293E-70 |
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