ELEK­TRONIKA MK-33

Description

Brand: ELEKTRONIKA (ЭЛЕКТРОНИКА)
Model: MK-33
Type: ELEKTRONIKA (ЭЛЕКТРОНИКА) MK-33
Batteries: D-0,125 D (Д-0,125 Д) x 3
or D-01 (Д-01) x 3
Lifetime: Introduced: 1982
Terminated: unknown
Notes: The ELEKTRONIKA MK-33 is a Soviet-built 9-digit calculator with basic functionality, memory, the square root, and the percentage function.

It is a remake of the ELEKTRONIKA S3-33 which was released in 1978. Even though this MK-33 model was released in 1982 it still uses an LED display instead of LCD.

The model on display here was not tested. It uses special rechargeable batteries with a non-standard formfactor and voltage.

Some helpful translations:
  • The Cyrillic symbol П is short for Память which translates to Memory.
  • Now the function of П+ and П− should be obvious.
  • The Cyrillic symbol И in ИП is short for Индикация which translates to Indication. Combined with Память this means that the ИП key shows the current value in memory.
  • The Cyrillic symbol С in СП is short for Сброс which translates to reset. The СП key therefore clears the calculator’s memory.
There is a lot of very interesting information on this calculator on other calculator collectors’ sites. For example:

This page (link validated 2025-12-06) on elektronika.su, a really nice museum site about Soviet calculators.
This page (link validated 2025-12-06) on rafalbartoszak.com.
This page (link validated 2025-12-06) on arithmomuseum.com.

Peripherals

The ELEKTRONIKA BP2-3S 220 V power adapter. An interesting kind of charger. Instead of a transformer it uses two diodes and two resistors to bring the mains power down enough to charge the cells. Fortunately the battery compartment is located in such a way that the charger needs to be removed from the mains socket. If that wasn’t the case it would have been a really dangerous charger.


©2025 Ernst Mulder