Which of the following is a source of loss in coaxial feed line?

• A. Water intrusion into coaxial connectors
• B. High SWR
• C. Multiple connectors in the line
• D. All these choices are correct

Answer: (D)

Loss in coaxial feed lines can occur due to several factors, and understanding these sources is critical for effective operation in ham radio.

Water intrusion into coaxial connectors can lead to corrosion and degradation of the signal quality. Moisture can interfere with the electrical connections and create resistance, which results in the loss of signal strength.

High Standing Wave Ratio (SWR) is another significant source of loss. A high SWR indicates that there is a mismatch between the impedance of the antenna and the coaxial feed line. This mismatch can cause reflections of the signal back toward the transmitter rather than allowing it to be fully radiated by the antenna, leading to power loss.

Multiple connectors in the line can also contribute to signal loss. Each connector introduces additional points where the signal can degrade due to poor connections, increased resistance, or reflections, all of which accumulate and result in further loss.

Therefore, since each of these listed issues contributes to the overall losses experienced in a coaxial feed line, the correct answer encompasses all of these factors.