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Radio Shack EC-420

Radio Shack EC-420
Image: Joe Haupt, CC BY-SA 2.0

The Radio Shack EC-420 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 10 functions, 28 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions10
Keys28
Precision8
LogicAlgebraic
Display typeVFD
Length133mm
Width76mm
Power Source2xAA
Year introduced1977

Replacements:

If you have a Radio Shack EC-420 that is no longer working, you can first try replacing the 2xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Radio Shack