The power cord
A ground wire
A feed line
A dummy load

length of the line
physical dimensions and relative positions of the conductors
frequency at which the line is operated
load placed on the line

52 ohms
26 ohms
39 ohms
13 ohms

can be the same for different diameter line
changes with the frequency of the energy it carries
is correct for only one size of line
is greater for larger diameter line

300 ohm twin-lead
600 ohm open-wire
75 ohm twin-lead
coaxial cable

the impedance of a section of the line one wavelength long
the dynamic impedance of the line at the operating frequency
the ratio of the power supplied to the line to the power delivered to the termination
equal to the pure resistance which, if connected to the end of the line, will absorb all the power arriving along it

capacitive reactance
inductive reactance
propagation delay
resistance

velocity of energy on the line
radius of the conductors
centre to centre distance between conductors
dielectric

terminating the line in its characteristic impedance
leaving the line open at the end
shorting the line at the end
increasing the standing wave ratio above unity

The distance between the centres of the conductors and the radius of the conductors
The distance between the centres of the conductors and the length of the line
The radius of the conductors and the frequency of the signal
The frequency of the signal and the length of the line

The ratio of the diameter of the inner conductor to the diameter of the braid
The diameter of the braid and the length of the line
The diameter of the braid and the frequency of the signal
The frequency of the signal and the length of the line

Two wires side-by-side in a plastic ribbon
Two wires side-by-side held apart by insulating rods
Two wires twisted around each other in a spiral
A center wire inside an insulating material which is covered by a metal sleeve or shield

Two wires twisted around each other in a spiral
A center wire inside an insulating material which is covered by a metal sleeve or shield
A metal pipe which is as wide or slightly wider than a wavelength of the signal it carries
Two wires side-by-side held apart by insulating rods

Open-conductor ladder line
Coaxial cable
Twin lead in a plastic ribbon
Twisted pair

Balanced unloader
Balanced to unbalanced
Balanced unmodulator
Balanced antenna network

Between the coaxial cable and the antenna
Between the transmitter and the coaxial cable
Between the antenna and the ground
Between the coaxial cable and the ground

Feed line with neither conductor connected to ground
Feed line with both conductors connected to ground
Feed line with both conductors connected to each other
Feed line with one conductor connected to ground

A triaxial transformer
A balun
A wavetrap
A loading coil

four or more conductors running parallel
only one conductor
braid and insulation around a central conductor
two parallel conductors separated by spacers

is made of two parallel wires
has one conductor inside the other
carries RF current on one wire only
is made of one conductor only

with an extra 250 ohm resistor
by using a 4 to 1 balun
by using a 4 to 1 trigatron
by inserting a diode in one leg of the antenna

Coaxial cable
75 ohm twin-lead
600 ohm open-wire
300 ohm twin-lead

It is weatherproof, and its impedance is higher than that of most amateur antennas
It is weatherproof, and its impedance matches most amateur antennas
It can be used near metal objects, and its impedance is higher than that of most amateur antennas
You can make it at home, and its impedance matches most amateur antennas

Ladder-line
Twisted pair
Coaxial cable
Twin lead

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

A PL-259 connector
An F-type cable connector
A banana plug connector
A binding post connector

A BNC connector
A PL-259 connector
An F-type cable connector
A binding post connector

An F-type cable connector
A BNC connector
A PL-259 connector
A type-N connector

RG-174
RG-59
RG-213
RG-58

To help keep their resistance at a minimum
To keep them looking nice
To keep them from getting stuck in place
To increase their capacitance

75 ohm twin-lead
600 ohm open-wire
Coaxial cable
300 ohm twin-lead

300 ohm twin-lead
600 ohm open-wire
75 ohm twin-lead
Coaxial cable

600 ohms
50 ohms
300 ohms
70 ohms

To keep television interference high
To keep the power going to your antenna system from getting too high
To keep the standing wave ratio of your antenna system high
To keep RF loss low

It will operate with a high SWR, and has less loss than coaxial cable
It has low impedance, and will operate with a high SWR
It will operate with a high SWR, and it works well when tied down to metal objects
It has a low impedance, and has less loss than coaxial cable

Shorten the excess cable so the feed line is an odd number of wavelengths long
Shorten the excess cable
Roll the excess cable into a coil which is as small as possible
Shorten the excess cable so the feed line is an even number of wavelengths long

Signal loss decreases as length increases
Signal loss increases as length increases
Signal loss is the least when the length is the same as the signal's wavelength
Signal loss is the same for any length of feed line

Signal loss increases with decreasing frequency
Signal loss increases with increasing frequency
Signal loss is the least when the signal's wavelength is the same as the feed line's length

an SWR reading of 1:1
less RF power being radiated
reflections occurring in the line
the wire radiating RF energy

open-wire
75 ohm twin-lead
coaxial cable
300 ohm twin-lead

ohms per MHz
dB per MHz
ohms per metre
dB per unit length

It would be increased by 100%
It would be reduced by 10%
It would be increased by 10%
It would be reduced to 50%

It is independent of frequency
It would increase
It depends on the line length
It would decrease

The best impedance match has been attained
An antenna for another frequency band is probably connected
No power is going to the antenna
The SWR meter is broken

A fairly good impedance match
An impedance match which is too low
An impedance mismatch; something
may be wrong with the antenna system

A negative reading
No reading at all
A jumpy reading
A very low reading

The transmitter is putting out more power than normal, showing that it is about to go bad
The antenna is the wrong length, or there may be an open or shorted connection somewhere in the feed line
There is a large amount of solar radiation, which means very poor radio conditions
The signals coming from the antenna are unusually strong, which means very good radio conditions

The ratio of maximum to minimum voltages on a feed line

The ratio of maximum to minimum inductances on a feed line
The ratio of maximum to minimum resistances on a feed line

You should transmit using less power
The conductors in the feed line are not insulated very well
The feed line is too long
The SWR may be too high, or the feed line loss may be high

heat is produced at the junction
the SWR reading falls to 1:1
the antenna will not radiate any signal
standing waves are produced in the feedline

perfect impedance match between transmitter and feedline
maximum transfer of energy to the antenna from the transmitter
lack of radiation from the transmission line
reduced transfer of RF energy to the antenna

comparing forward and reflected voltage
measuring radiated RF energy
measuring the conductor temperature
inserting a diode in the feed line

6:1
3:1
4:1
5:1

75 ohm twin-lead
600 ohm open-wire
coaxial line
300 ohm twin-lead

An antenna tuner
An SWR meter
A low pass filter
A high pass filter

It matches a transceiver to a mismatched antenna system
It helps a receiver automatically tune in stations that are far away
It switches an antenna system to a transmitter when sending, and to a receiver when listening
It switches a transceiver between different kinds of antennas connected to one feed line

An SWR meter
An impedance-matching device
A low pass filter
A terminating resistor

When air wound transformers are used instead of iron-core transformers
When the power-supply fuse rating equals the primary winding current
When the impedance of the load is equal to the impedance of the source
When the load resistance is infinite

The electrical load is shorted
The source delivers maximum power to the load
No current can flow through the circuit
The source delivers minimum power to the load

So the load will draw minimum power from the source
To ensure that there is less resistance than reactance in the circuit
To ensure that the resistance and reactance in the circuit are equal
So the source can deliver maximum power to the load

high load impedance
low ohmic resistance
matching of impedances
inductive impedance

high load impedance
matching of impedance
proper method of balance
low ohmic resistance

must be a full wavelength long
must be an odd number of quarter-wave
must be an even number of half-waves
will have no effect on the matching

ensure that the radiated signal has the intended polarization
transfer the maximum amount of power to the antenna
prevent frequency drift
overcome fading of the transmitted signal

dipole is approximately 300 ohms, and you are using RG8U (50 ohms) coaxial lines, what is the ratio required to have the line and the antenna matched?

2:1
4:1

The electric and magnetic lines of force of a radio wave are perpendicular to the earth's surface
The electric lines of force of a radio wave are perpendicular to the earth's surface
The electric lines of force of a radio wave are parallel to the earth's surface
The magnetic lines of force of a radio wave are parallel to the earth's surface

The magnetic lines of force of a radio wave are perpendicular to the earth's surface
The electric lines of force of a radio wave are perpendicular to the earth's surface
The electric and magnetic lines of force of a radio wave are parallel to the earth's surface
The electric lines of force of a radio wave are parallel to the earth's surface

Helical
Horizontal
Vertical
Circular

Circular
Horizontal
Parabolical
Vertical

the height of the antenna
the electric field
the type of antenna
the magnetic field

hypothetical point source
infinitely long piece of wire
dummy load
half-wave reference dipole

A parabola
A cardioid
A unidirectional cardioid
A sphere

random length of wire
horizontal ground-plane antenna
vertical ground-plane antenna
horizontal dipole antenna

fed with the correct type of RF
too near to the ground
parallel with the ground
mounted vertically

polarized at right angles to original
vertically polarized
horizontally polarized
polarized in any plane

at weaker strength
without any comparative difference
if the antenna changes the polarization
at greater strength

It decreases
It increases
It stays the same
It disappears

It stays the same
It increases
It disappears
It decreases

15 metres (49.2 ft)
4 metres (13.1 ft)
12 metres (39.4 ft)
32 metres (105 ft)

300 000 kilometres per second
3000 kilometres per second
150 kilometres per second
186 000 kilometres per second

increase the resonant frequency
have little effect
decrease the resonant frequency
have no change on the resonant frequency

lowering the radiating element
increasing the height of the radiating element
shortening the radiating element
lengthening the radiating element

is infinite in space
is the same as the speed of light
is always less than half speed of light
varies directly with frequency

limit the electrical length of the antenna
increase the effective antenna length
allow the antenna to be more easily held vertically
prevent any loss of radio waves by the antenna

shorten it
lengthen it
ground one end
centre feed it with TV ribbon feeder

large wire-wound resistors
a coil and capacitor in parallel
coils wrapped around a ferrite rod
hollow metal cans

360 m (1181 ft)
150 m (492 ft)
1500 m (4921 ft)
30 m (98 ft)

An antenna where the driven element obtains its radio energy by induction or radiation from director elements
An antenna where all elements are driven by direct connection to the feed line
An antenna where some elements obtain their radio energy by induction or radiation from a driven element
An antenna where wave traps are used to magnetically couple the elements

Use traps on the elements
Use larger diameter elements
Use tapered-diameter elements
Use closer element spacing

A major lobe will develop in the horizontal plane, parallel to the two elements
A major lobe will develop in the horizontal plane, toward the parasitic element
A major lobe will develop in the vertical plane, away from the ground
The radiation pattern will not be affected

A major lobe will develop in the horizontal plane, parallel to the two elements
A major lobe will develop in the vertical plane, away from the ground
A major lobe will develop in the horizontal plane, away from the parasitic element, toward the dipole
The radiation pattern will not be affected

bandwidth
front-to-back ratio
impedance
polarization

1.5 dB
3.0 dB
6.0 dB
2.1 dB

The numerical ratio of the signal in the forward direction to the signal in the back direction
The numerical ratio of the amount of power radiated by an antenna compared to the transmitter output power
The final amplifier gain minus the transmission line losses
The numerical ratio relating the radiated signal strength of an antenna to that of another antenna

Antenna length divided by the number of elements
The angle between the half- power radiation points
The angle formed between two imaginary lines drawn through the ends of the elements
The frequency range over which the antenna may be expected to perform well

Minimum radiation from the ends, maximum broadside
Maximum radiation from the ends, minimum broadside
Omnidirectional
Maximum radiation at 45 degrees to the plane of the antenna

isotropic
ideal
ionosphere
interpolated

the forward power of the major lobe to the power in the backward direction both being measured at the 3 dB points
the ratio of the maximum forward power in the major lobe to the maximum backward power radiation
undefined
the ratio of the forward power at the 3 dB points to the power radiated in the backward direction

Divide 468 (1532) by the antenna's operating frequency (in MHz)
Divide 300 (982) by the antenna's operating frequency (in MHz)
Divide 71.5 (234) by the antenna's operating frequency (in MHz)
Divide 150 (491) by the antenna's operating frequency (in MHz)

3.6 metres (11.8 ft)
3.36 metres (11.0 ft)
7.2 metres (23.6 ft)
6.76 metres (22.2 ft)

64 cm (25.2 in)
128 cm (50.4 in)
105 cm (41.3 in)
134.6 cm (53 in)

A 5/8-wavelength antenna has less corona loss
A 5/8-wavelength antenna has more gain
A 5/8-wavelength antenna is easier to install on a car
A 5/8-wavelength antenna can handle more power

Most of it is aimed high into the sky
Most of it goes equally in two opposite directions
It goes out equally well in all horizontal directions
Most of it goes in one direction

It increases the radiation angle
It brings the feed point impedance closer to 300 ohms
It brings the feed point impedance closer to 50 ohms
It lowers the radiation angle

It increases
It decreases
It stays the same
It approaches zero

300 ohms balanced feed line
75 ohms balanced feed line
300 ohms coaxial cable
50 ohms coaxial cable

receive signals equally well from all compass points around it
be very sensitive to signals coming from horizontal antennas
require few insulators
be easy to feed with TV ribbon feeder

To tune out capacitive reactance
To lower the losses
To lower the Q
To improve reception

The angle of radiation is high giving excellent local coverage
The angle of radiation is low
It is easy to match the antenna to the transmitter
It's a convenient length on VHF

None
Two
Three
One

5.21 metres (17 feet)
10.67 metres (35 feet)
20.12 metres (66 feet)
10.21 metres (33 feet and 6 inches)

5.18 metres (17 feet)
6.4 metres (21 feet)
3.2 metres (10.5 feet)
12.8 metres (42 feet)

4.88 metres (16 feet)
5.33 metres (17.5 feet)
10.67 metres (35 feet)
2.66 metres (8.75 feet)

SWR increases
Weight decreases
Wind load decreases
Gain increases

High gain, less critical tuning and wider bandwidth
High gain, lower loss and a low SWR
High front-to-back ratio and lower input resistance
Shorter boom length, lower weight and wind resistance

It provides excellent omnidirectional coverage in the horizontal plane
It is smaller, less expensive and easier to erect than a dipole or vertical antenna
It provides the highest possible angle of radiation for the HF bands
It helps reduce interference from other stations off to the side or behind

The relative position of the driven element with respect to the reflectors and directors
The power radiated in the major radiation lobe compared to the power radiated in exactly the opposite direction
The power radiated in the major radiation lobe compared to the power radiated 90 degrees away from that direction
The number of directors versus the number of reflectors

Optimize the lengths and spacing of the elements
Use RG-58 feed line
Use a reactance bridge to measure the antenna performance from each direction around the antenna
Avoid using towers higher than 9 metres (30 feet) above the ground

0.15
0.5
0.75
0.2

7 dB
13 dB
20 dB
10 dB

10.5 metres (34.37 ft)
28.55 metres (93.45 ft)
5.08 metres (16.62 ft)
10.16 metres (33.26 ft)

It usually produces vertically polarized radiation
It must be longer than 1 wavelength
You may experience RF feedback in your station
You must use an inverted T matching network for multi-band operation

It is a figure-eight, perpendicular to the antenna
It is a circle (equal radiation in all directions)
It is two smaller lobes on one side of the antenna, and one larger lobe on the other side
It is a figure-eight, off both ends of the antenna

73 and 150
73 and 300
52 and 100
52 and 200

mostly to the South and North
mostly to the South
equally in all directions
mostly to the East and West

It is essentially the same
It is less than 50%
It is 0.707 times the bandwidth
It is greater

It is too sharply directional at lower frequencies
It will radiate harmonics
It must be neutralized
It can only be used for one band

It may be used for multi- band operation
It has high directivity at the higher frequencies
It has high gain
It minimizes harmonic radiation

38 meters (125 ft.)
32 meters (105 ft.)
45 meters (145 ft.)
75 meters (245 ft.)

A center-fed wire 1/2-electrical wavelength long
A vertical conductor 1/4- electrical wavelength high, fed at the bottom
Two or more parallel four- sided wire loops, each approximately one-electrical wavelength long
Four straight, parallel elements in line with each other, each approximately 1/2-electrical wavelength long

A type of cubical quad antenna, except with triangular elements rather than square
A large copper ring or wire loop, used in direction finding
An antenna system made of three vertical antennas, arranged in a triangular shape
An antenna made from several triangular coils of wire on an insulating form

3.54 metres (11.7 feet)
0.36 metres (1.17 feet)
14.33 metres (47 feet)
143 metres (469 feet)

21.43 metres (70.3 feet)
5.36 metres (17.6 feet)
53.34 metres (175 feet)
7.13 metres (23.4 feet)

2.67 metres (8.75 feet)
7.13 metres (23.4 feet)
10.67 metres (35 feet)
3.5 metres (11.5 feet)

They perform very well only at HF
They compare favorably with a three-element Yagi
They are effective only when constructed using insulated wire
They perform poorly above HF

The quad has more directivity in both horizontal and vertical planes
The quad has more directivity in the horizontal plane but less directivity in the vertical plane
The quad has less directivity in the horizontal plane but more directivity in the vertical plane
The quad has less directivity in both horizontal and vertical planes

It will change the antenna polarization from vertical to horizontal
It will significantly decrease the antenna feed point impedance
It will change the antenna polarization from horizontal to vertical
It will significantly increase the antenna feed point impedance

The relative position of the driven element with respect to the reflectors and directors
The power radiated in the major radiation lobe compared to the power radiated in exactly the opposite direction
The power radiated in the major radiation lobe compared to the power radiated 90 degrees away from that direction
The number of directors versus the number of reflectors

three-quarters of a wavelength
one wavelength
two wavelengths
one-half wavelength

one-quarter of a wavelength
one wavelength
two wavelengths
one-half of a wavelength