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G2B12

What is a practical way to avoid harmful interference when selecting a frequency to call CQ using phone?

Select	Answer
A	Listen for 2 minutes before calling CQ to avoid interference to contacts that may be in progress
B	Ask if the frequency is in use, say your callsign, and listen for a response
C	Keep your CQ to less than 2 minutes in length to avoid interference to contacts that may be in progress
D	Call CQ at low power first and if there is no indication of interference, increase power as necessary

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