Which of the following VHF/UHF band segments are limited to CW only?

• A. 144.000 MHz to 144.100 MHz and 50.000 MHz to 50.100 MHz
• B. 50.0 MHz to 50.1 MHz and 144.0 MHz to 144.1 MHz
• C. 146.000 MHz to 148.000 MHz
• D. 430.000 MHz to 450.000 MHz

Answer: (B)

The segment between 50.0 MHz to 50.1 MHz and 144.0 MHz to 144.1 MHz is designated for CW (Continuous Wave) operation, which is a mode primarily used for Morse code. This allocation is specifically set aside to encourage CW operation within the VHF and UHF amateur bands, promoting effective communication over these frequencies.

CW is a vital mode of operation for many amateur radio operators, particularly due to its efficiency and effectiveness in weak signal conditions. These segments allow operators to focus on this traditional form of communication without interference from other modes of transmission.

The other segments referenced in the other choices are either designated for voice communications or other digital modes rather than being strictly limited to CW. This reflects an intentional licensing approach to manage frequencies and modes effectively while encouraging specific usage patterns within the amateur radio community.