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
  • 5.12 Resonance and Tuned Circuits


    Resonance is the condition that exists when:
    inductive reactance and capacitive reactance are equal
    inductive reactance is the only opposition in the circuit
    the circuit contains no resistance
    resistance is equal to the reactance

    Parallel tuned circuits offer:
    low impedance at resonance
    zero impedance at resonance
    an impedance equal to resistance of the circuit
    very high impedance at resonance

    Resonance is an electrical property used to describe:
    an inductor
    a set of parallel inductors
    the results of tuning a varicap (varactor)
    the frequency characteristic of a coil and capacitor circuit

    A tuned circuit is formed from two basic components. These are:
    resistors and transistors
    directors and reflectors
    diodes and transistors
    inductors and capacitors

    When a parallel coil-capacitor combination is supplied with AC of different frequencies, there will be one frequency where the impedance will be highest. This is the:
    resonant frequency
    impedance frequency
    inductive frequency
    reactive frequency

    In a parallel-resonant circuit at resonance, the circuit has a:
    low impedance
    low mutual inductance
    high mutual inductance
    high impedance

    In a series resonant circuit at resonance, the circuit has:
    low impedance
    high impedance
    low mutual inductance
    high mutual inductance

    A coil and an air-spaced capacitor are arranged to form a resonant circuit. The resonant frequency will remain the same if we:
    increase the area of plates in the capacitor
    replace the air dielectric with oil in the capacitor
    wind more turns on the coil
    add a resistor to the circuit

    Resonant circuits in a receiver are used to:
    filter direct current
    select signal frequencies
    increase power
    adjust voltage levels

    Resonance is the condition that exists when:
    inductive reactance and capacitive reactance are equal and opposite in sign
    inductive reactance is the only opposition in the circuit
    the circuit contains no resistance
    resistance is equal to the reactance

    When a series LCR circuit is tuned to the frequency of the source, the:
    line current lags the applied voltage
    line current leads the applied voltage
    line current reaches maximum
    impedance is maximum