ICOM IC-4KL is a 1 kW linear amplifier with a fully automatic, high-speed antenna tuner that provides instant antenna matching conditions during QSYs. It offers full break-in operation, complete protection circuits, and a built-in 40 V, 60 A switching power supply with automatic selection for use with 100 ~ 120 V AC or 200 ~ 240 V AC input. The two needle meters show SWR, final transistor collector current, output power, final transistor temperature, etc. It also features rack mounting handles for mounting with a 18-inch rack and a simple connection design for use with an Icom transceiver.