The KL 505 is a 12V DC linear amplifier with a maximum output power of 230W, designed for use in the 10-meter amateur radio band (or in other HF bands with the use of a suitable low-pass filter). It requires a drive power of 1 to 10W in all its operating modes. In addition, the KL 505 features a six-position output power selector controlled by a switch on the front panel, as well as a receive preamplifier with electronic switching, which can be activated via a switch located on the front panel.