🔍 Key Concepts

• Transmit vs. receive signal paths inside a VHF set • Function of the Push-To-Talk (PTT) circuit in switching from receive to transmit • What the antenna relay / protection circuits actually do and when they act

💭 Think About

• Think about which circuits are ONLY used when you are transmitting but not when you are receiving. • Ask yourself: when you press the PTT, what has to change inside the radio for the set to go from receive mode to transmit mode? • Consider whether protection circuits like SWR or bias faults would usually block transmit completely, or more likely cause other symptoms (like distorted output, overheating, or damage).

✅ Before You Answer

• Identify which option directly controls the radio’s changeover from receive to transmit. • Decide which component failure would still allow normal reception but prevent any RF from being generated or switched to the antenna. • Verify which choices describe conditions that would more likely cause poor or unsafe transmission, not a total inability to key up and transmit.