🔍 Key Concepts

• SSB (Single Sideband) radio antenna systems and how the automatic tuner matches the antenna to the transmitter • Difference between coaxial cable and high-voltage RF (radio frequency) cable • Why an insulated backstay acts as a long-wire antenna and what kind of feed connection it needs

💭 Think About

• Look at which choices are coaxial cables typically used between the radio and tuner, versus which is meant for carrying high RF voltage from tuner to antenna • Think about whether the backstay connection from the tuner carries high power RF at high voltage or low-level signal like ordinary audio or DC power • Consider which cable type is designed to handle strong RF fields and prevent arcing at the insulators of the backstay

✅ Before You Answer

• Identify which options (RG8U, RG213, 16-gauge two-conductor, GTO-15) are coaxial cables and which is a high-voltage RF lead • Recall the typical location of the automatic tuner on a sailboat (near the base of the backstay, outside the cabin) and what kind of environment and voltage stress that output lead must withstand • Eliminate any cable types that are mainly for low-voltage DC or standard coax runs, not for high-voltage RF to an antenna element