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Corvus 406

Date of introduction:  1975 Display technology:  LED-stick
New price:   Display size:  8
Size:  5.0" x 3.0" x 0.9"    
Weight:  3.7 ounces Serial No:  406-0108960
Batteries:  9V Date of manufacture:  mth 02 year 1975
AC-Adapter:  A-3310 Origin of manufacture:  USA
Precision:  8 Integrated circuits:  Mostek MK50282A
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Corvus_406_PCB.jpg (78141 Byte)The Corvus 400 changed during production time it's calculator brain and the power supply. This Corvus 406 uses a 9V battery instead the four unusual  N-batteries found in the earlier model 400.

Within a short period of only some month Corvus manufactured 4 different versions of the original Model 400. This gives an idea of both cost pressure and material shortage mid of the 70's.

Serial Number Supply Calculator Brain Date 
Code
Display 
Driver
LED 
Display
400-016025 4*N MK50280A wk 51 year 74 1 IC LED-stick
400-110291 4*N MK50282A wk 06 year 75 2 IC LED modules
2310-0122872 4*A MK50282N wk 08 year 75 discrete LED-stick
406-0108960 9V MK50282A wk 07 year 75 discrete LED modules

Learn more about Mostek Calculator Integrated Circuits.

Don't miss the colorful Corvus 804.


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

Joerg Woerner, November 19, 2002. No reprints without written permission.