Radio Shack EC-100

Date of introduction:  1973 Display technology:  LED-modules
New price:  $129.95 Display size:  8
Size:  5.8" x 3.5" x 1.5"
 147 x 88 x 38 mm3
Weight:  6.7 ounces, 191 grams Serial No:  A 5490
Batteries:  4*AA Date of manufacture:  
AC-Adapter:   Origin of manufacture:  
Precision:  8 Integrated circuits:  
Program steps:   Courtesy of:  Cleo McCall

This boxy calculator does not look like a Texas Instruments product. To identify it you should compare it with the Montgomery Ward P800 and the later Radio Shack EC-200.

If you look deeper into the calculator you'll notice that the EC-100 is very similar to the TI-2500 Datamath. This Radio Shack EC-100 is once again a calculator using the famous Texas Instruments Klixon™ keyboard technology. 

The EC-100 was soon replaced with the EC-200, nevertheless did we discover a variation of the EC-100 with a slightly different keyboard.

Datamath™ and Klixon™ are trademarks of Texas Instruments.

Known serial numbers:

A 5490, A 11346, A 16983, 

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© Joerg Woerner, December 5, 2001. No reprints without written permission.