Question
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?
Answer Options
- A) 440 MHz - 450 MHz
- B) 53 MHz - 54 MHz
- C) 222 MHz - 223 MHz
- D) 420 MHz - 430 MHz
Correct Answer: D
Explanation
The region north of Line A, particularly near the Canadian border, has special frequency restrictions to protect Canadian government radio systems. The FCC rules apply these limitations to prevent interference across the international border, where certain frequencies may be allocated differently in each country. This is a crucial rule for amateurs operating in the northern US states.
Specifically, amateur stations in the contiguous 48 states located north of Line A are generally prohibited from transmitting in the 420 MHz - 430 MHz segment of the 70-centimeter band. This restriction ensures compliance with the international agreement with Canada to share the 420-450 MHz band without mutual interference.
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