Electronica RC-01 Analog Reverb Echo/Delay [Электроника РЦ-01], 1987, made in USSR

Link: ruskeys

Specification:

• 5 control knobs include Input and Output volume, Balance, Delay time and Feedback.
• Delay times also is fixed with buttons : 10, 20, 40, 80, 160, 320 ms.
• The repeat rate is very sensitive and subtle and the intensity knob allows for almost endless repeats.
• Connectors: IN and OUT on 5-DIN
• Body made of metal, size is between half and full rack. 
• Power : 220/240 V AC