Voice encryption unit; manufactured probably by Brown Boveri AG.

With the voice encryption unit introduced to the troops around 1998, encrypted voice communication is possible with the SE-430 radio station.

• Principle: Voice encryption unit
• Operation modes: CLear, CRypto

• from the SE-430

• mm, kg

• Key input device for SVZ-430

The SVZ-430 voice encryption unit is connected to the SVZ-430 socket on the BG-430 control unit of the SE-430 using the corresponding connection cable. The Microtel is connected to the „Audio“ connector on the SVZ.

First the key has to be fed to the SVZ-430 using the key input device (filling gun). The key input device is connected to the „KEY“ socket and the SVZ-430 operation mode switch is set to the CR position. The key is now typed in according to the key command, it is shown on the illuminated display, when the E button on the input device is pressed, the key is transferred and the display goes out.

The operation mode switch sets the SVZ-430 from clear mode (CL) to crypto mode (CR), the TT switch position is intended for test mode, emergency cancellation of the key takes place when the switch is set to EC and the control knob is pulled out.

In crypto mode, the transmit button on the Mikrotel must be pressed, the transmit lamp lights up, on the first call you must wait 5 seconds until the crypto connection is synchronised, from then on you can work normally in crypto mode. When the E-430 / BG-430 is switched off or in the event of brief power interruptions, the key is retained for up to 10 seconds.

Digital voice encryption device.

The set is solid state.

The SVZ-430 was developed by Brown Boveri around 1983 and introduced around 1998. It was used by the air force for voice encryption in the emergency network between airfields from 1998 to 2010.

• SVZ-430 on the hamfu website