RWI (Radio Wire integration) for tactical radios remote control.
Uses local unit SU-434 and remote unit SU-433.
Connection between local and remote units is done by up to 3 Km field cable.
Remote PTT (Push to Talk) was done by DC signaling.
Operated with audio amplifier UL-90 or UL-92.
Used by the US military from early 1950s until early 1980s, designated AN/GRA-6 (Remote control unit C-233/GRC; local control unit C-434/GRC).
Used by the IDF during the Six Day War (1967).
Based on vacuum tune technology.
Local unit powered by two BU-30 batteries (1.5 Volts). Remote unit powered by two BU-30 batteries (1.5 Volts) and BU-414 battery (45 Volts).
