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Which of the following frequencies is within the General Class portion of the 75-meter phone band?
When is an amateur station permitted to transmit secret codes?
What is the maximum bandwidth permitted by FCC rules for Amateur Radio stations transmitting on USB frequencies in the 60-meter band?
Which of the following criteria must be met for a non-U.S. citizen to be an accredited Volunteer Examiner?
Under what circumstances are messages that are sent via digital modes exempt from Part 97 third party rules that apply to other modes of communication?
What does the expression "CQ DX" usually indicate?
What is the customary minimum frequency separation between SSB signals under normal conditions?
What does the Q signal "QRL?" mean?
When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?
Which communication system sometimes uses the Internet to transfer messages?
What does the A-index indicate?
What does MUF stand for?
Why is long distance communication on the 40-meter, 60-meter, 80-meter and 160-meter bands more difficult during the day?
What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?
What is an instance in which the use of an instrument with analog readout may be preferred over an instrument with a digital readout?
Which of the following could be a cause of interference covering a wide range of frequencies?
How close to the upper edge of the 20-meter General Class band should your displayed carrier frequency be when using 3 kHz wide USB?
Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?
What is impedance?
What is the output PEP from a transmitter if an oscilloscope measures 500 volts peak-to-peak across a 50 ohm resistive load connected to the transmitter output?
What is the value in microfarads of a 4700 nanofarad (nF) capacitor?
What is an advantage of using a ferrite core toroidal inductor?
Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?
Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?
Which of the following describes the function of a two input NOR gate?
What is the simplest combination of stages that implement a superheterodyne receiver?
What is the name of the process that changes the phase angle of an RF wave to convey information?
What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?
How many data bits are sent in a single PSK31 character?
What is the characteristic impedance of flat ribbon TV type twinlead?
Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?
How does increasing boom length and adding directors affect a Yagi antenna?
What is the primary purpose of antenna traps?
What effect does transmitter duty cycle have when evaluating RF exposure?
Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?