DATAMATH CALCULATOR MUSEUM
Texas Instruments professional 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:||429273|
|Batteries:||9V or RK2||Date of manufacture:||wk 09 year 1978|
|AC-Adapter:||AC9900/R||Origin of manufacture:||Italy (RCI)|
|Program steps:||Courtesy of:||Marie Lisa Collas|
Texas Instruments professional? We were really surprised to receive in September 2014 a link from fellow collector Marie Lisa Collas to this unusual looking calculator on the Italian eBay site. It is obvious that the model professional - 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 professional manufactured in 1978 reveals a standard TI-30 printed circuit board (PCB) with the well-known TMS0981 single-chip calculator circuit.
This unique professional followed early in 1978 the model
40 and was replaced
already in 1979 with the
model 30/super. Don't miss the unique
Studio 29 and colorful
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© Joerg Woerner, October 26, 2014. No reprints without written permission.