Radio Shack EC-2008 (65-964)

Date of introduction:  1986 Display technology:  LCD
New price:  $12.95 (SRP 1987) Display size:  8
Size:  4.7" x 4.1" x 1.0"
 120 x 106 x 25 mm3
Weight:  3.0 ounces, 86 grams Serial No:  
Batteries:  n.a.  Date of manufacture:  year 1987
AC-Adapter:   Origin of manufacture:  Taiwan
Precision:  10  Integrated circuits:  Toshiba
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Does this Radio Shack EC-2008 calculator look familiar to you?

Dismantling the featured EC-2008 manufactured in 1987 by Cal-Comp Electronics, an OEM (Original Equipment Manufacturer) in Taiwan, reveals a clean design centered around an unknown Toshiba single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and powered by solar cells.

Inspecting the PCB of this Radio Shack EC-2008 calculator brought our attention to a small mark reading SD10-10, most likely a reference to Type Small Desktop 10 and Revision 1.0 of the design (schematics and layout). We spotted a similar PCB-Mark SD9-14 already with the EC-2006A and its near identical offspring TI-1795 and started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

The EC-2008 with 10-digits capacity was introduced shortly after the EC-2006A dropping the [+/-] key and introducing an [AC] key while switching from a Sharp brain to a Toshiba chip. Interesting to notice that Texas Instruments kept the SD9 design for about 15 years and used for the TI-1796 with 10-digits capacity a larger housing and different OEM before in 1996 switching with the TI-1795+ and TI-1796+ duo back to Radio Shack's approach.

IIf you have additions to the above article please email:

Joerg Woerner, March 15, 2020. No reprints without written permission.