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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
Memories:      
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.
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



If you have additions to the above article please email: joerg@datamath.org.

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