Canadian Basic pool, section 6-03

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Subelement 6

Feedlines and Antenna Systems

Section 6-03

popular antenna feed line and coaxial connector types

6-03-01

Why does coaxial cable make a good antenna feed line?

A.
It is weatherproof, and its impedance is higher than that of most amateur antennas
Correct Answer
B.
It is weatherproof, and its impedance matches most amateur antennas
C.
It can be used near metal objects, and its impedance is higher than that of most amateur antennas
D.
You can make it at home, and its impedance matches most amateur antennas

6-03-01

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6-03-02

What is the best antenna feed line to use, if it must be put near grounded metal objects?

A.
Ladder-line
B.
Twisted pair
Correct Answer
C.
Coaxial cable
D.
Twin lead

6-03-02

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6-03-03

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

A.
You must use an impedance-matching device with your transceiver, and it does not work very well with a high SWR
B.
It does not work well when tied down to metal objects, and it cannot operate under high power
Correct Answer
C.
It does not work well when tied down to metal objects, and you must use an impedance- matching device with your transceiver
D.
It is difficult to make at home, and it does not work very well with a high SWR

6-03-03

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6-03-04

What common connector usually joins RG-213 coaxial cable to an HF transceiver?

Correct Answer
A.
A PL-259 connector
B.
An F-type cable connector
C.
A banana plug connector
D.
A binding post connector

6-03-04

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6-03-05

What common connector usually joins a hand-held transceiver to its antenna?

Correct Answer
A.
A BNC connector
B.
A PL-259 connector
C.
An F-type cable connector
D.
A binding post connector

6-03-05

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6-03-06

Which of these common connectors has the lowest loss at UHF?

A.
An F-type cable connector
B.
A BNC connector
C.
A PL-259 connector
Correct Answer
D.
A type-N connector

6-03-06

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6-03-07

If you install a 6 metre Yagi antenna on a tower 50 metres from your transmitter, which of the following feed lines is best?

A.
RG-174
B.
RG-59
Correct Answer
C.
RG-213
D.
RG-58

6-03-07

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6-03-08

Why should you regularly clean, tighten and re-solder all antenna connectors?

Correct Answer
A.
To help keep their resistance at a minimum
B.
To keep them looking nice
C.
To keep them from getting stuck in place
D.
To increase their capacitance

6-03-08

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6-03-09

What commonly available antenna feed line can be buried directly in the ground for some distance without adverse effects?

A.
75 ohm twin-lead
B.
600 ohm open-wire
Correct Answer
C.
Coaxial cable
D.
300 ohm twin-lead

6-03-09

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6-03-10

When antenna feed lines must be placed near grounded metal objects, which of the following feed lines should be used?

A.
300 ohm twin-lead
B.
600 ohm open-wire
C.
75 ohm twin-lead
Correct Answer
D.
Coaxial cable

6-03-10

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6-03-11

TV twin-lead feed line can be used for a feed line in an amateur station. The impedance of this line is approximately:

A.
600 ohms
B.
50 ohms
Correct Answer
C.
300 ohms
D.
70 ohms

6-03-11

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