Ham Amateur Radio Technician Practice Exam 2026 - Free Technician Practice Questions and Study Guide

The RCA Phono connector is commonly used for low frequency or DC signal connections to a transceiver due to its practical design and ease of use. This type of connector is widely accepted in audio and video applications, making it versatile for various signal types. For amateur radio and similar applications, the RCA Phono connector is utilized to connect equipment such as audio output, input, and other signal connections that may require a simple, reliable interface for low frequency signals.

Other connector types serve different purposes; for example, XLR connectors are typically used for professional microphones and audio gear, designed for balanced audio signals. USB connectors are primarily found in digital applications for data transfer and power supply, lacking the specificity for low frequency signals in amateur radio contexts. TRS connectors, often used for audio connections, are better suited for balanced or unbalanced audio signals but are not the standard for low frequency DC connections like the RCA Phono connector. Therefore, RCA Phono is the most suitable choice for low frequency or DC signal connections to a transceiver.