How to Choose the Right Power Supply for Ham Radio?

Power Rating Considerations

When selecting a power supply for a ham radio, consider the device’s power requirements. A typical ham radio operates on 12V DC, and the power consumption varies from 5-20 watts. For example, the Yaesu FT-60R transceiver requires 5.5 watts of power. To determine the required power supply wattage, calculate the power consumption of the ham radio and any additional accessories, such as a microphone, antenna tuner, or a laptop for logging. As a general rule, add 10-20% to the total power consumption to account for any additional load.

Battery Backup Considerations

In a grid-down scenario, a battery backup system is essential for long-term operation. Consider a deep cycle battery with a capacity of at least 100 Ah, which can provide 5-10 hours of operation for a 5-watt ham radio. The battery should be connected to a charge controller that regulates the charging process to prevent overcharging and battery damage. A 12V, 20A MPPT charge controller can efficiently charge a 200 Ah deep cycle battery from a solar panel or a wind turbine.

Power Supply Options

There are several power supply options available for ham radio operation, including linear power supplies, switching power supplies, and battery-powered power supplies. Linear power supplies are simple and reliable but inefficient, while switching power supplies are more efficient but may introduce noise into the power circuit. Battery-powered power supplies, such as the Goal Zero Yeti, offer a portable and reliable solution for ham radio operation in a grid-down scenario. When selecting a power supply, consider the device’s efficiency, noise level, and ease of use.