Corvus 300E

Date of introduction:  1973 Display technology:  Panaplex II
New price:   Display size:  10
Size:  8.5" x 6.5" x 2.2"    
Weight:  1 pound 9 ounces Serial No:  300E-13084
Batteries:   Date of manufacture:  mth 08 year 1973
AC-Adapter:  230 V Origin of manufacture:  USA
Precision:  10 Integrated circuits:  Mostek MK5021B
Program steps:   Courtesy of:  Joerg Woerner

Corvus, the consumer division of the famous IC manufacturer MOSTEK, introduced with the Model 300E their first desktop four-function calculator. Compared with similar products like the Texas Instruments TI-3000 the Model 300E added square-root, [1/x] and [%] keys.

Corvus_300E_PCB.jpg (65000 Byte)The printed circuit board (PCB) of the Corvus 300E looks really empty with one few electronic components and a big power supply. We are curious about the unusual holes and slits in the lower part of the PCB.
Learn more about Mostek Calculator Integrated Circuits.

Three different desktop calculators were available from Corvus:

Model 300E: Unusual desktop calculator with square-root function
Model 305: Added full clock function to the 300E
Model 307: Added 4-key memory instead the square-root function

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, March 23, 2003. No reprints without written permission.