Exam Primer

1. Regulations and Policies
  • Authority and Regulations
  • Licence
  • License Penalties
  • Certificate
  • Operation, Repair
  • Content Restrictions
  • Operating Restrictions
  • Interference
  • Emergencies
  • Non-remuneration, Privacy
  • Call Signs
  • Other Countries
  • Frequency Bands
  • Power Allowed
  • unmodulated carriers, retransmission
  • amplitude modulation, frequency stability, me
  • International Telecommunication Union (ITU)
  • Exams
  • Antenna Structures
  • RF Field Strength
  • Resolving Complaints
  • 2. Operating and Procedures
  • VHF/UHF Repeaters - Voice
  • Phonetic Alphabet
  • Voice Operating Procedures
  • tuning, testing and dummy loads
  • Morse Code (CW) procedures
  • RST signal reporting, S meter
  • Q Signals
  • Emergency Operating Procedures
  • Record Keeping, Antenna Orientation and Maps
  • 3. Station Assembly, Practice and Safety
  • Layout of HF Stations
  • Layout of FM Transmitters
  • Layout of FM Receivers
  • Layout of CW Transmitters
  • Layout of SSB/CW receivers
  • Layout of SSB Transmitters
  • Layout of Digital Systems
  • Layout of Regulated Power Supplies
  • Layout of Yagi-Uda Antennas
  • Receiver Fundamentals
  • Transmitter, carrier, keying, AM
  • Carrier Suppression, SSB
  • Frequency and Phase Modulation
  • Station Accessories
  • Digital Modes
  • Batteries
  • Power Supplies
  • Electrical Safety
  • Antenna and Tower Safety
  • RF Exposure Safety
  • 4. Circuit Components
  • Amplifier Fundamentals
  • Diodes
  • Bipolar Transistors
  • Field-effect Transistors
  • Tiode Vacuum Tubes
  • Resister Color Codes
  • 5. Basic Electronics and Theory
  • Metric Prefixes
  • Basic Concepts
  • Circuits
  • Ohm's law
  • Series and Parallel Resistors
  • Power law, Resister Power Disipation
  • AC and frequency
  • Ratios, Logarithms and Decibels
  • Inductance and Capacitance
  • Reactance and Impedance
  • Magnetica and Transformers
  • Resonance and Tuned Circuits
  • Meters and Measurements
  • 6. Feedlines and Antenna Systems
  • Impedance and Feedlines
  • Balanced and Unbalanced feedlines
  • Feedlines and Connectors
  • Line Losses
  • Standing Wave Ratio
  • Impedance Matching
  • Isotropic Sources, Polarization
  • Wavelength vs Physical Length
  • Antenna Radiation Patterns
  • Vertical Antennas
  • Yagi Antennas
  • Wire Antennas
  • Quad/loop Antennas
  • 7. Radio Wave Propagation
  • Propogation Types
  • Ionospheric Regions
  • Hops and Skips
  • Ionosphere Issues
  • Solar Activity
  • MF and HF and Skywaves
  • VHF and UHF, Sporadic-E, Aurira, Ducting
  • Scatter - HF, VHF, UHF
  • 8. Interference and Suppression
  • Front-end overload
  • Audio Rectification, Bypass Capacitors, Ferri
  • Intermodulation, Spurious, Key-clicks
  • Harmonics, Splatter, Transmitter Adjustments
  • Filters
  • 6.8 Wavelength vs Physical Length


    If an antenna is made longer, what happens to its resonant frequency?
    It decreases
    It increases
    It stays the same
    It disappears

    If an antenna is made shorter, what happens to its resonant frequency?
    It stays the same
    It increases
    It disappears
    It decreases

    The wavelength for a frequency of 25 MHz is:
    15 metres (49.2 ft)
    4 metres (13.1 ft)
    12 metres (39.4 ft)
    32 metres (105 ft)

    The velocity of propagation of radio frequency energy in free space is:
    300 000 kilometres per second
    3000 kilometres per second
    150 kilometres per second
    186 000 kilometres per second

    Adding a series inductance to an antenna would:
    increase the resonant frequency
    have little effect
    decrease the resonant frequency
    have no change on the resonant frequency

    The resonant frequency of an antenna may be increased by:
    lowering the radiating element
    increasing the height of the radiating element
    shortening the radiating element
    lengthening the radiating element

    The speed of a radio wave:
    is infinite in space
    is the same as the speed of light
    is always less than half speed of light
    varies directly with frequency

    At the end of suspended antenna wire, insulators are used. These act to:
    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

    To lower the resonant frequency of an antenna, the operator should:
    shorten it
    lengthen it
    ground one end
    centre feed it with TV ribbon feeder

    One solution to multiband operation with a shortened radiator is the "trap dipole" or trap vertical. These "traps" are actually:
    large wire-wound resistors
    a coil and capacitor in parallel
    coils wrapped around a ferrite rod
    hollow metal cans

    The wavelength corresponding to a frequency of 2 MHz is:
    360 m (1181 ft)
    150 m (492 ft)
    1500 m (4921 ft)
    30 m (98 ft)