Radio Shack EC-2000

Date of introduction:  1974 Display technology:  Panaplex II
New price:  $79.95 Display size:  10
Size:  8.1" x 6.3" x 2.5"    
Weight:  1 pound 8 ounces Serial No:  01509
Batteries:   Date of manufacture:  
AC-Adapter:  120 V Origin of manufacture:  USA
Precision:  10 Integrated circuits:  TMS0106
Program steps:   Courtesy of:  Joerg Woerner

This Radio Shack EC-2000 desktop calculator could be easily identified as a Texas Instruments product. If you compare the layout of the keyboard with the TI-3500 you'll notice an identical assembly, even the sliding switches and the power switch match in style and position. Don't miss the earlier EC-1000 based on the TI-3000 but using a completely different housing.

EC-2000_1.jpg (127022 Byte)Removing the backside of the housing proves our ideas - the complete printed circuit board (PCB) of the calculator is borrowed from the TI-3500. 

The EC-2000 was the last Texas Instruments desktop calculator sold under the Radio Shack brand, later models based on far-east OEM products.

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Joerg Woerner, January 12, 2004. No reprints without written permission.