🔍 Key Concepts

• Dynamotor construction – how combining a motor and generator in one unit affects performance • Energy conversion losses – what happens each time power is converted from one form to another • Difference between advantages (e.g., compact, battery operable) and disadvantages of older radio power supplies

💭 Think About

• When a device is both a motor and a generator in one housing, what kinds of losses or inefficiencies might you expect compared to a single solid-state power supply? • Which choice describes a property that would usually be considered a benefit for shipboard radio equipment rather than a drawback? • Think about shipboard battery power: would being able to run directly from batteries be something radio designers want, or something they try to avoid?

✅ Before You Answer

• Identify which options clearly describe benefits for space-limited, battery-powered installations and set those aside first • Ask: which option would cause more power to be wasted as heat or loss inside the unit? • Confirm that you understand that the question asks for a disadvantage, so eliminate any feature that would normally make equipment more practical at sea