Radio Amateur Quiz Canadian License

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Question B-003-010-010

A communications receiver has four filters installed in it, respectively designated as 250 Hz, 500 Hz, 2.4 kHz and 6 kHz. You are copying a CW transmission and there is a great deal of interference. Which one of the filters would you choose?

Correct Answer

250 Hz

Explanation

A narrow filter like 250 Hz is ideal for CW reception in crowded band conditions, as it significantly reduces interference from nearby signals.

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