Deep Dive: T3B07
The correct answer is A: The approximate wavelength in meters. In addition to frequency, amateur radio bands are identified by their approximate wavelength in meters. This is a traditional way of naming bands that dates back to the early days of radio. For example, the '20-meter band' refers to frequencies around 14 MHz, which have wavelengths of approximately 20 meters. The '2-meter band' refers to frequencies around 144 MHz with wavelengths of about 2 meters. This wavelength naming convention is widely used in amateur radio and provides an intuitive way to think about bands - longer wavelengths (lower frequencies) for longer-distance communications, shorter wavelengths (higher frequencies) for shorter-range communications.
Why Other Answers Are Wrong
Option B: Incorrect. While some bands have letter/number designators, wavelength is the primary identifier used in amateur radio. Most amateurs refer to bands by wavelength (2 meters, 20 meters, etc.). Option C: Incorrect. Channel numbers are used in some services (like CB radio), but amateur bands are identified by wavelength, not channel numbers. Option D: Incorrect. Not all options are correct. Wavelength is the primary identifier, though other methods exist.
Exam Tip
Band identification = Wavelength. Remember: Amateur bands are identified by their approximate wavelength in meters (2 meters, 20 meters, 80 meters, etc.) in addition to frequency.
Memory Aid
**B**and **I**D = **B**y **W**avelength (think 'BI = BW' = By Wavelength)
Real-World Example
When you say you're operating on '20 meters,' you're referring to the band by its wavelength. The 20-meter band covers approximately 14.000-14.350 MHz, and signals in this range have wavelengths around 20 meters. Similarly, '2 meters' refers to the 144-148 MHz band where signals have wavelengths around 2 meters. This wavelength naming is universal in amateur radio.
Source & Coverage
Question Pool: 2022-2026 Question Pool
Subelement: T3B
Reference: FCC Part 97.303
Key Concepts
Verified Content
Question from the official FCC Technician Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the T3B topic.