When is an amateur station required to transmit its assigned call sign?

An amateur station is required to transmit its assigned call sign at least every 10 minutes during a contact and again at the end of the contact. This requirement ensures proper identification of the station, in compliance with regulations set by the Federal Communications Commission (FCC). The rule serves multiple purposes: it helps prevent interference by allowing others to know which operator is using the frequency, it promotes accountability by providing clear identification of the operator, and it facilitates the orderly operation of the amateur radio bands.

The requirement to transmit the call sign every 10 minutes during a contact emphasizes the importance of keeping the communication within the legal framework, thereby contributing to responsible amateur radio operation. Providing the call sign again at the end of the contact ensures that it is fresh in the minds of those who may be listening, which enhances clarity and compliance.

In summary, the frequency of transmission, both during the conversation and at its conclusion, reinforces identification protocols crucial for the licensing of amateur radio operators, ensuring a responsible and well-regulated use of the amateur radio spectrum.