Elka Eh105 -

It sounds like you're asking about a (or a special function) for the ELKA EH 105 — a classic Bulgarian electronic calculator from the 1980s.

If you buy an , you have two choices: leave it "broken" for character, or restore it for reliability. Capacitors in 1970s Italian electronics are notorious for going bad. A full recap costs about $150 in parts and 4 hours of soldering. elka eh105

If you are a :

The plastic rocker tabs become brittle. Some will snap off. 3D printing replacements is common. You can also lubricate the pivot points with silicone grease (never WD-40). It sounds like you're asking about a (or

: While it lacks deep sound editing, it allows users to layer two presets to create more complex textures. elka eh105