Faber-Castell TR2
Serial number 026700265
Accessories Gebrauchsanleitung (German), bound copy of the manual, undated
Condition Cosmetically, the calculator is in excellent good shape, both on the front and back. The installable battery pack has been opened to remove the batteries. The batteries themselves are dead. Also, the cover of the battery compartment has been carefully removed. A number of keys are bouncing.
Repairs, Comments 5.2.2003 Disassembled and cleand the unit.
28.7.2003 Attached a connector for an off-the-shelf 6V power supply.
Acquired 29.1.2003
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Type, Precision, Input mode Simple, 8 BCD digits, no exponent, Algebraic
Programmable No
Memory 1 summation register, not permanent. Also used to store intermediate operands when using brackets!
Display 8 digit 7 segment red LED plus sign
Special features Slide rule on the back of the calculator with the follwing scales (for those who didn't quite trust the electronics). Note that the sliding part has scales on the back as well.
Outer, top LL03: e-X, LL02: e-0.1X, LL01: e-0.01X, K: X3, A: X²
Inner, front B: x2, BI: 100:X2, CI: 10:X, C: X
Inner, back T1: tan 0.1X & cot, ST: arc 0.01X, S: sin 0.1X & cos, P: sqrt(1-(0.1X)2), C: X
Outer, bottom D: X, L: lg X, LL1: e0.01X, LL2: e0.1X, LL3: eX
Original Pricing, Production Germany, 1974
Batteries Battery pack with 4x 1.5V huge button-sized cells. Battery type is "150 DK DEAC".
There was an external charging station for the battery pack available.
Ground is on the battery pack connector located next to the power switch, plus is next to the X<->Y key. The unit works fine with a DC 6V off-the-shelf power supply.
Dimensions Length 5.7cm, Width 17.1cm, Height 1.9cm
Links Datamath Museum.
Comment Faber-Castell produced these calculators: TRX, TR1, TR2, TR3, TR4 and "Johann Faber 76". The latter was identical to the TR1 except that it was colored dark-green instead of black. TR-2, TR-3 and TR-4 were available with and without slide rule. (Information thanks to Robert Adam)
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