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
  • 6.2 Balanced and Unbalanced feedlines


    What is a coaxial cable?
    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

    What is parallel-conductor feed line?
    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

    What kind of antenna feed line is made of two conductors held apart by insulated rods?
    Open-conductor ladder line
    Coaxial cable
    Twin lead in a plastic ribbon
    Twisted pair

    What does the term "balun" mean?
    Balanced unloader
    Balanced to unbalanced
    Balanced unmodulator
    Balanced antenna network

    Where would you install a balun to feed a dipole antenna with 50-ohm coaxial cable?
    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

    What is an unbalanced line?
    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

    What device can be installed to feed a balanced antenna with an unbalanced feed line?
    A triaxial transformer
    A balun
    A wavetrap
    A loading coil

    A flexible coaxial line contains:
    four or more conductors running parallel
    only one conductor
    braid and insulation around a central conductor
    two parallel conductors separated by spacers

    A balanced transmission line:
    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

    A 75 ohm transmission line could be matched to the 300 ohm feedpoint of an antenna:
    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

    What kind of antenna feed line can be constructed using two conductors which are maintained a uniform distance apart using insulated spreaders?
    Coaxial cable
    75 ohm twin-lead
    600 ohm open-wire
    300 ohm twin-lead