Tohotronic Roger F-6
Brief History
Toho Tsusho Co., Ltd. can be connected to manufacturing some pocket calculators under Tohotronic RogerFighter brand with its unusual metallic housing and rounded buttons. In the F series there are basic, four-function models and scientific ones with exponential displaying capacity too. In the japanese-made F-6 a commercially available NEC uPD951C CPU and an Itron vacuum-fluorescent tube can be found.
| Manufacturer: | Toho Tsusho Co. Ltd. (Japan) |
| Mfg. date: | 1975 |
| Size: | 8,6×15,7×2,7 cm |
| Weight (ready for operate): | 216 g |
| Type: | scientific |
| Capacity: | 8/8+2 digits (input/display) 8/8+2 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | NEC uPD951C |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Sciscientific (exponential) notation BSbackspace (right-shift) function 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 |
| Display: | 12 digit VFD (Itron FG125A2) |
| Power: | 2×AA-type battery 3V adaptor |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 62.0295 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.0166784E-70 |
RogerFighter F-6
Inside of the F-6
Keyboard PCB of the F-6
Similar items
