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
  • 6.4 Line Losses

    Practice


    B-006-04-01
    Why should you use only good quality coaxial cable and connectors for a UHF antenna system?
    To keep television interference high
    To keep the power going to your antenna system from getting too high
    To keep the standing wave ratio of your antenna system high
    To keep RF loss low

    B-006-04-02
    What are some reasons to use parallelconductor feed line?
    It will operate with a high SWR, and has less loss than coaxial cable
    It has low impedance, and will operate with a high SWR
    It will operate with a high SWR, and it works well when tied down to metal objects
    It has a low impedance, and has less loss than coaxial cable

    B-006-04-03
    If your transmitter and antenna are 15 metres apart, but are connected by 65 metres of RG-58 coaxial cable, what should be done to reduce feed line loss?
    Shorten the excess cable so the feed line is an odd number of wavelengths long
    Shorten the excess cable
    Roll the excess cable into a coil which is as small as possible
    Shorten the excess cable so the feed line is an even number of wavelengths long

    B-006-04-04
    As the length of a feed line is changed, what happens to signal loss?
    Signal loss decreases as length increases
    Signal loss increases as length increases
    Signal loss is the least when the length is the same as the signal's wavelength
    Signal loss is the same for any length of feed line

    B-006-04-05
    As the frequency of a signal is changed, what happens to signal loss in a feed line?
    Signal loss increases with decreasing frequency
    Signal loss increases with increasing frequency
    Signal loss is the least when the signal's wavelength is the same as the feed line's length
    Signal loss is the same for any frequency

    B-006-04-06
    Losses occurring on a transmission line between transmitter and antenna results in:
    an SWR reading of 1:1
    less RF power being radiated
    reflections occurring in the line
    the wire radiating RF energy

    B-006-04-07
    The lowest loss feed line on HF is:
    open-wire
    75 ohm twin-lead
    coaxial cable
    300 ohm twin-lead

    B-006-04-08
    In what values are RF feed line losses expressed?
    ohms per MHz
    dB per MHz
    ohms per metre
    dB per unit length

    B-006-04-09
    If the length of coaxial feed line is increased from 20 metres (65.6 ft) to 40 metres (131.2 ft), how would this affect the line loss?
    It would be increased by 100%
    It would be reduced by 10%
    It would be increased by 10%
    It would be reduced to 50%

    B-006-04-10
    If the frequency is increased, how would this affect the loss on a transmission line? (Answer bank has it wrong. Answer should be: It would increase)
    It is independent of frequency
    It would increase
    It depends on the line length
    It would decrease