||Simple, 8 BCD digits, no exponent, Algebraic
||1 summation register, not permanent. Also used
intermediate operands when using brackets!
||8 digit 7 segment red LED plus sign
||Slide rule on the back of the calculator with
scales (for those who didn't quite trust the electronics). Note that the sliding part has scales on the back as well.
LL01: e-0.01X, K: X3, A: X²
CI: 10:X, C:
0.1X & cot, ST: arc 0.01X, S:
sin 0.1X &
cos, P: sqrt(1-(0.1X)2), C: X
||D: X, L:
lg X, LL1: e0.01X,
||Battery pack with 4x 1.5V huge button-sized
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.
||Length 5.7cm, Width 17.1cm, Height 1.9cm
||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)