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
  • 3.17 Power Supplies


    If your mobile transceiver works in your car but not in your home, what should you check first?
    The power supply
    The speaker
    The microphone
    The SWR meter

    What device converts household current to 12 VDC?
    A low pass filter
    A power supply
    An RS-232 interface
    A catalytic converter

    Which of these usually needs a heavyduty power supply?
    An antenna switch
    A receiver
    A transceiver
    An SWR meter

    What may cause a buzzing or hum in the signal of an AC-powered transmitter?
    A bad filter capacitor in the transmitter's power supply
    Using an antenna which is the wrong length
    Energy from another transmitter
    Bad design of the transmitter's RF power output circuit

    A power supply is to supply DC at 12 volts at 5 amperes. The power transformer should be rated higher than:
    17 watts
    2.4 watts
    6 watts
    60 watts

    The diode is an important part of a simple power supply. It converts AC to DC, since it:
    has a high resistance to AC but not to DC
    allows electrons to flow in only one direction from cathode to anode
    has a high resistance to DC but not to AC
    allows electrons to flow in only one direction from anode to cathode

    To convert AC to pulsating DC, you could use a:

    Power-line voltages have been made standard over the years and the voltages generally supplied to homes are approximately:
    120 and 240 volts
    110 and 220 volts
    100 and 200 volts
    130 and 260 volts

    So-called "transformerless" power supplies are used in some applications (notably tube-type radios and TV receivers). When working on such equipment, one should be very careful because:
    DC circuits are negative relative to the chassis
    chassis connections are grounded by the centre pin of the power source's plug
    the load across the power supply is variable
    one side of the line cord is connected to the chassis

    If household voltages are consistently high or low at your location, this can be corrected by the use of:
    a full-wave bridge rectifier
    an autotransformer
    a variable voltmeter
    a proper load resistance

    You have a very loud low- frequency hum appearing on your transmission. In what part of the transmitter would you first look for the trouble?
    the power supply
    the variable-frequency oscillator
    the driver circuit
    the power amplifier circuit