DATAMATH CALCULATOR MUSEUM
Texas Instruments 40 distributed by Koh-I-Noor Hardtmuth
|Date of introduction:||1977||Display technology:||LED-stick|
|New price:||Display size:||8 (5 + 2)|
|Size:|| 5.8" x 3.1" x
148 x 78 x 36 mm3
|Weight:||4.0 ounces, 114 grams||Serial No:||179551|
|Batteries:||9V or RK2||Date of manufacture:||wk 21 year 1977|
|AC-Adapter:||AC9900/R||Origin of manufacture:||Italy (RCI)|
|Program steps:||Courtesy of:||Joerg Woerner|
Texas Instruments 40? We were really surprised to locate in December 2012 this unusual looking calculator on the Italian eBay site. It is obvious that the model 40 - manufactured for Koh-I-Noor Hardtmuth - is a hybrid of three different products:
|• The basic functionality
is borrowed without any doubts from the
TI-30 introduced in 1976
• The double-shot injection molded keys are known from the Business Analyst-I
• The yellow-brown keyboard plate is... unique
Dismantling this model 40 manufactured in 1977 reveals a standard TI-30 printed circuit board (PCB) with the well-known TMS0981 single-chip calculator circuit.
This unique model 40 was replaced in 1978 with the model professional. Don't miss the model Studio 29.
in rare calculators with the "40" designation? Don't miss this
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© Joerg Woerner, April 6, 2011. No reprints without written permission.