Exam Primer

Overview
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
  • 6.1 Impedance and Feedlines

    Practice


    B-006-01-01
    What connects your transceiver to your antenna?
    The power cord
    A ground wire
    A feed line
    A dummy load

    B-006-01-02
    The characteristic impedance of a transmission line is determined by the:
    length of the line
    physical dimensions and relative positions of the conductors
    frequency at which the line is operated
    load placed on the line

    B-006-01-03
    The characteristic impedance of a 20 metre piece of transmission line is 52 ohms. If 10 metres were cut off, the impedance would be:
    52 ohms
    26 ohms
    39 ohms
    13 ohms

    B-006-01-04
    The impedance of a coaxial line:
    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

    B-006-01-05
    What commonly available antenna feed line can be buried directly in the ground for some distance without adverse effects?
    300 ohm twin-lead
    600 ohm open-wire
    75 ohm twin-lead
    coaxial cable

    B-006-01-06
    The characteristic impedance of a transmission line is:
    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

    B-006-01-07
    A transmission line differs from an ordinary circuit or network in communications or signaling devices in one very important way. That important aspect is:
    capacitive reactance
    inductive reactance
    propagation delay
    resistance

    B-006-01-08
    The characteristic impedance of a parallel wire transmission line does not depend on the:
    velocity of energy on the line
    radius of the conductors
    centre to centre distance between conductors
    dielectric

    B-006-01-09
    Any length of transmission line may be made to appear as an infinitely long line by:
    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

    B-006-01-10
    What factors determine the characteristic impedance of a parallel-conductor antenna feed line?
    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

    B-006-01-11
    What factors determine the characteristic impedance of a coaxial antenna feed 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