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G3B03
Which frequency will have the least attenuation for long-distance skip propagation?
Pick an answer to check it.
Answer: A. Just below the MUF
Absorption in the ionosphere is lower at higher frequencies, so the highest frequency that still gets refracted back works best. Just below the MUF gives the least attenuation for long-distance skip.
Tip: Just below the MUF is best.