Ham Radio Extra Class Practice Test 2025 - Free Extra Class License Exam Questions and Study Guide

Question: 1 / 400

What signal is used in ham radio to indicate an operator is ending their transmission?

Fade-out

73

The use of "73" in ham radio communication signifies that an operator is sending their best regards and typically indicates that they are ending their transmission. This term is part of amateur radio shorthand and has been widely adopted in the community, functioning as a friendly farewell. It originates from a code used in telegraphy and is understood to convey good wishes.

In contrast to other options, "CQ" is a general call to all stations, inviting anyone who hears the transmission to respond. "Fade-out" describes a phenomenon related to signal strength rather than an actual signal indicating the end of a communication. "10-4" is part of the ten-code used primarily in citizen band (CB) radio and is not typically used in amateur radio contexts. Therefore, "73" is the appropriate and correct signal for concluding a conversation in ham radio.

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CQ

10-4

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