The SP8A is a Vacuum Fluorescent Display tube manufactured by Itron for calculators. The 'SP' in the name signifies that it is a "Special" readout, and the "8" signifies the diameter of the tube in millimeters.
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| Component type | VFD Tube |
|---|---|
| Manufacturer | Itron |
| Introduced | 1970s |
It features a minus symbol and an error indicator.
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