Sharp Elsi Mate EL-8118 from the 70's in Japan: yet another VFD based calculator

[jebem]

This unit is in reasonable condition for its age. The case is intact, except a tiny hair line close to the power adapter jack.

The calculator was used extensively, as the worn keyboard membrane shows, but all the keys still register fine as long as we press it firmly.

From the back engraved label:
Rating: (DC) 3V 0.3W
(Dry Battery SUM-3 x 2) 3V
(Rechargeable Battery EA-18B) 2.4V
Or (AC Adapter / Charger EA-17E) 3V
Sharp Corporation
Made in Japan

An additional very worn silver sticker label informs about the patents involved in the manufacturing process.
"Manufactured under one or more of the following patents:
USA ..... UK ..... CANADA ..... "

Hardware details:
- The VFD is bright as new, thanks for the installed excellent FUTABA 9-ST-12 unit.
- The high quality electrolytic capacitors are from Nichicon - They measure fine after more than 40 years!
- 28 DIP IC Hitachi HD37351 SoC, made in 1976 I believe.
- The high voltage transformer was made by TDK Japan.
- The current consumption on this unit is:
52mA after power on (only one digit lit).
65mA with all digits lit.