Deep Dive: E1F05
The correct answer is D: 420 MHz - 430 MHz. Amateur stations may not transmit in which of the following frequency segments if they are located in the contiguous 48 states and north of Line A is 420 MHz - 430 MHz. Stations north of Line A in the contiguous 48 states cannot transmit in 420-430 MHz. For amateur radio operators, this is important for understanding frequency restrictions. Understanding this helps ensure legal operation.
Why Other Answers Are Wrong
Option A (440-450 MHz): Incorrect. 440-450 MHz isn't restricted - 420-430 MHz is restricted. 440-450 MHz is wrong. Option B (53-54 MHz): Incorrect. 53-54 MHz isn't restricted - 420-430 MHz is restricted. 53-54 MHz is wrong. Option C (222-223 MHz): Incorrect. 222-223 MHz isn't restricted - 420-430 MHz is restricted. 222-223 MHz is wrong.
Exam Tip
Stations north of Line A in contiguous 48 states = cannot transmit in 420-430 MHz. Think 'N'orth of 'L'ine 'A' = 'N'o '4'20-'4'30 MHz. Stations north of Line A in contiguous 48 states cannot transmit in 420-430 MHz. Not 440-450 MHz, not 53-54 MHz, not 222-223 MHz - just 420-430 MHz.
Memory Aid
Stations north of Line A in contiguous 48 states = cannot transmit in 420-430 MHz. Think 'N'orth of 'L'ine 'A' = 'N'o '4'20-'4'30 MHz. Stations north of Line A in contiguous 48 states cannot transmit in 420-430 MHz. Important frequency restriction.
Real-World Example
An amateur station located in the contiguous 48 states and north of Line A: It may not transmit in the 420-430 MHz segment. This restriction is due to coordination with other services. Other segments (440-450 MHz, 53-54 MHz, 222-223 MHz) are not restricted. This is the restriction - 420-430 MHz is prohibited for stations north of Line A.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E1F
Reference: FCC Part 97.303
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E1F topic.