RM KL-405 HF Linear Amplifier – 180W Output, 3–30 MHz Range

The RM KL-405 is a compact and versatile HF linear amplifier designed for amateur radio and CB enthusiasts operating across the 3–30 MHz frequency range. With up to 180W output power, it’s ideal for boosting transmission strength on bands including 10m, 11m, and shortwave.

Equipped with a built-in 26dB preamplifier, the KL-405 enhances weak signal reception, making it a reliable companion for both mobile and base station setups. Its 6-position power selector allows precise control over output levels, while integrated protection features ensure safe operation.

The KL-405’s rugged metal chassis, compact footprint, and efficient cooling make it a favourite among HF operators seeking clean, distortion-free amplification in a portable form.

Key Features

• Frequency range: 3–30 MHz

• Output power: Up to 180W

• Input power: 1–10W (AM/FM), 2–20W (SSB/CW)

• Modes supported: AM, FM, SSB, CW

• Built-in 26dB RX preamplifier (switchable)

• 6-stage power control

• Polarity protection and dual fuse system

• Compact design with integrated cooling fan (V version)

• Whether you're chasing DX or improving local comms, the RM KL-405 delivers dependable performance and signal clarity. Available now at Radioworld UK.