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
  • 8.5 Filters

    Practice


    B-008-05-01
    What type of filter might be connected to an amateur HF transmitter to cut down on harmonic radiation?
    A low pass filter
    A key-click filter
    A high pass filter
    A CW filter

    B-008-05-02
    Why do modern HF transmitters have a built-in low pass filter in their RF output circuits?
    To reduce fundamental radiation
    To reduce low frequency interference to other amateurs
    To reduce harmonic radiation
    To reduce RF energy below a cut-off point

    B-008-05-03
    What circuit blocks RF energy above and below a certain limit?
    A high pass filter
    An input filter
    A low pass filter
    A band pass filter

    B-008-05-04
    What should be the impedance of a low pass filter as compared to the impedance of the transmission line into which it is inserted?
    Substantially lower
    Twice the transmission line impedance
    About the same
    Substantially higher

    B-008-05-05
    In order to reduce the harmonic output of a high frequency (HF) transmitter, which of the following filters should be installed at the transmitter?
    Band pass
    High pass
    Rejection
    Low pass

    B-008-05-06
    To reduce harmonic output from a transmitter, you would put a _______ in the transmission line as close to the transmitter as possible.
    high pass filter
    low pass filter
    band reject filter
    wave trap

    B-008-05-07
    To reduce energy from an HF transmitter getting into a television set, you would place a _______ as close to the TV as possible.
    low pass filter
    wave trap
    band reject filter
    high pass filter

    B-008-05-08
    A band pass filter will:
    attenuate high frequencies but not low
    pass frequencies each side of a band
    allow only certain frequencies through
    stop frequencies in a certain band

    B-008-05-09
    A band reject filter will:
    allow only two frequencies through
    pass frequencies each side of a band
    pass frequencies below 100 MHz
    stop frequencies each side of a band

    B-008-05-10
    A high pass filter would normally be fitted:
    between microphone and speech amplifier
    at the Morse key or keying relay in a transmitter
    at the antenna terminals of the TV receiver
    between transmitter output and feed line

    B-008-05-11
    A low pass filter suitable for a high frequency transmitter would:
    pass audio frequencies above 3 kHz
    attenuate frequencies below 30 MHz
    attenuate frequencies above 30 MHz
    pass audio frequencies below 3 kHz