Radio Shack EC-4001 (Programmable)
The Radio Shack EC-4001 is a programmable calculator with 8 digits precision and algebraic logic. It has 19 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is PP3 9V battery. Note: Sinclair Cambridge Programmable
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Programmable |
| Keys | 19 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | LED |
| Length | 102mm |
| Width | 51mm |
| Thickness | 25mm |
| Power Source | PP3 9V battery |
| Year introduced | 1977 |
| Year discontinued | 1978 |
Replacements:
If you have a Radio Shack EC-4001 that is no longer working, you can first try replacing the PP3 9V battery. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.
We suggest the following current model as a replacement: