Elektronika MK-61 calculator

Made in 1996 in Kiev, Ukraine

 

Factory seal. Never opened.

Microcalculator "Elektronika MK 61"
Manufactured    Serial Number
96 07                 777868
V = 4.5V           Pot. = 0.6 W
Price 85 Ruble

External Power Adapter:

Specifications:
Input 220V 50Hz
Output 5V 0.1A
Manufacturing date: 93 03

The power regulation is good enough for this application (readings taken with input at 231 VAC):
- Voltage on open circuit:  8.6 V 
- Voltage with 47 ohm resistive load: 5.2 V  (111 mA)
- Voltage with 33 ohm resistive load: 4.9 V  (146 mA)

The operations manual includes the schematic in A3 paper format. Nice!
The image was scanned at 300dpi in grey, and cropped in 6 parts to maintain the resolution after the upload.

Latin transcription of the original Russian Cyrillic legends.

Original: