10W-Class PA Equipment Cooling Design Practical Guide: Parallel Operation of Air Cooling, Peltier, and Duct Systems

10W-class PA (Power Amplifier) equipment is widely used in small transmission stations, repeaters, and experimental RF systems. Although compact, these devices often operate continuously 24 hours a day, and accumulated heat can lead to performance degradation and reduced lifespan. In this article, we introduce practical design strategies for cooling 10W-class PA equipment, especially how to maximize efficiency by combining air cooling, Peltier modules, and duct systems in parallel operation. The heat generated by PA equipment originates from power loss, with approximately 30–50% of the input power converted to heat. In the case of a 10W output PA, about 10W of heat is continuously produced. If this heat is not efficiently managed, internal temperature rises, leading to issues such as RF performance deterioration, component aging, and condensation.     Parallel Cooling Strategy with Air Cooling, Peltier, and Duct The basic of cooling design is air cooling. P...