What is an appropriate power supply rating for a typical 50 watt output mobile FM transceiver?

• A. 12 volts at 5 amperes
• B. 13.8 volts at 12 amperes
• C. 24 volts at 3 amperes
• D. 6 volts at 10 amperes

Answer: (B)

For a typical 50 watt output mobile FM transceiver, a power supply rated at 13.8 volts and 12 amperes is ideal because it factors in the transceiver's power output and the efficiency of the device.

The power output of 50 watts can be calculated using the formula: Power (Watts) = Voltage (Volts) x Current (Amperes). In the case of a mobile transceiver, which generally operates on around 13.8 volts, a power supply that can deliver at least 12 amperes ensures that there is enough current available for the radio to operate at its full capacity during transmission and to handle any peak demands.

Considering the other power supply options, the 12 volts at 5 amperes would be insufficient for the current required during full power operation. The 24 volts at 3 amperes is not suitable because the voltage is incorrect for this type of transceiver, which typically expects around 12 to 14 volts. Lastly, 6 volts at 10 amperes is also inadequate, as the voltage is too low for the transceiver's operational requirements.

Therefore, a 13.8 volts at 12 amperes power supply is both appropriate and provides a suitable