The RM LA‑250V is a high‑performance 200 W VHF linear amplifier designed for the 140–150 MHz range, ideal for operators on the 2 m Amateur Band. At its core are four Mitsubishi RD70 MOSFETs mounted on a precision‑machined copper heat spreader, ensuring excellent thermal stability and long‑duration reliability.

Active Cooling System

To maintain peak performance under heavy use, the LA‑250V is equipped with integrated cooling fans that draw air across the heat sink and MOSFET assembly. This active cooling system works in tandem with the copper spreader to keep temperatures under control, even during extended transmission periods.

User‑Focused Design

The amplifier offers both an external PTT input and a built‑in HF‑VOX, giving operators flexible keying options. The front‑panel LCD display provides real‑time monitoring of:

• Input power

• Output power

• Heat‑sink temperature

• Output VSWR

Users can also adjust the backlight intensity for improved visibility in any environment.

Advanced Protection & Diagnostics

A dedicated onboard CPU continuously monitors:

• Input power

• Temperature

• VSWR

If abnormal conditions occur, the amplifier automatically disables transmission to prevent damage. All fault events are logged internally, enabling efficient diagnostics by the manufacturer or authorised service centres.