This is a picture of the Speech/Morse generator that was used by
the STASI and Russian intelligence.
Picture by Detlev Vreisleben
Video’s on YouTube by Peter Staal
KG-84A/C encryption device, used by many military forces. It was developed to ensure secure transmission of digital data. The system is no longer produced.
The KG-84A and KG-84C operate in simplex, half-duplex, or full-duplex modes.