*Einheitsbedienungsgerät (EBG) Type 1

*The EBG served as a "Standard Control Unit" linking the S406 high-frequency (HF) transmitter and the E437 S or other main receiver.

*In addition, the EBG served as a power connection, Morse Code key connection, and a microphone connection.

Photo by Bruce Culp

Photo by kind permission of the German Navel Association