The 4075 linear amplifier has been meticulously crafted for contemporary communication systems that are predominantly data-driven, necessitating reliable performance at elevated duty cycles over prolonged durations. Offered in 500W and 1kW configurations, its innovative liquid cooling system enhances thermal management, minimising the risk of overheating in the power components and thereby prolonging the lifespan of the equipment. This compact amplifier, designed for rack mounting, along with its power supply, occupies a mere 5U of cabinet space.