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E4E11:What could be the cause of local AM broadcast band signals combining to generate spurious signals on the MF or HF bands?

E4E11E4E

What could be the cause of local AM broadcast band signals combining to generate spurious signals on the MF or HF bands?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E4E11 is Nearby corroded metal connections are mixing and reradiating the broadcast signals.

The key fact is Nearby corroded metal connections are mixing and reradiating the broadcast signals. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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