*The EBG is shown here as the box on the right.
*Sender S406S = main high-frequency transmitter for the U-boat
*Sender Spez 2113 II S = antenna loader for 150 W M/F S 427 S beacon transmitter
*Senderwahltafel Sch 503 S = transmitter
*Tastgerat St 414 S = M/F Keyer
*Furthermore, the EBG provided the U-boat radio operator with radiation-free tuning, fine tuning, zero-beat transmission, regulation of energy, listening loudness level, and note tuning.