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What is the characteristic impedance of a twin wire feeder used in television?

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What is the characteristic impedance of a twin wire feeder used in television?

(a) 1000 ohm

(b) 100 ohm

(c) 10 ohm

(d) 300 ohm

I have been asked this question in an international level competition.

Asked question is from Advantages of Filter Method in section SSB Modulation of Analog Communications

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The correct option is (d) 300 ohm

Best explanation: Twin wire feeder consists of two wires with spacers.  For a twin wire feeder the characteristic impedance should be close to 300 ohm.

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