Radio Amateur Quiz Canadian License

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Question B-006-003-003

What are some reasons not to use parallel-conductor transmission line?

Correct Answer

It does not work well when tied down to metal objects, and you should use a balun and may have to use an impedance-matching device with your transceiver

Explanation

Parallel line (window/ladder line) is susceptible to impedance changes near metal, and usually requires a balun to connect to unbalanced transceiver outputs. Its impedance (300-600 ohms) often requires an antenna tuner.

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