How are radio communications usually affected by the charged particles that reach the Earth from solar
coronal holes? - Answers HF communications are disturbed
Approximately how long is each side of the reflector element of a quad antenna? - Answers Slightly
more than 1/4 wavelength
Which of the following is an advantage of a log periodic antenna? - Answers Wide bandwidth
What is the maximum transmitting power an amateur station may use on 10.140 MHz? - Answers 200
watts PEP output
What is the maximum bandwidth permitted by FCC rules for Amateur Radio stations transmitting on USB
frequencies in the 60-meter band? - Answers 2.8 kHz
What is the maximum symbol rate permitted for RTTY or data emission transmitted on the 1.25-meter
and 70-centimeter bands? - Answers 56 kilobaud
What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter
band? - Answers 1200 baud
What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter
band? - Answers 19.6 kilobaud
Which of the following conditions require a licensed Amateur Radio operator to take specific steps to
avoid harmful interference to other users or facilities? - Answers All of these choices are correct
When is it permissible to communicate with amateur stations in countries outside the areas
administered by the Federal Communications Commission? - Answers When the contact is with
amateurs in any country except those whose administrations have notified the ITU that they object to
such communications
What is the approximate bandwidth of a PACTOR3 signal at maximum data rate? - Answers 2300 Hz
What is the purpose of the 'notch filter' found on many HF transceivers? - Answers To reduce
interference from carriers in the receiver passband
What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct
adjustment of the plate tuning control? - Answers A pronounced dip
What is a reason to use Automatic Level Control (ALC) with an RF power amplifier? - Answers To reduce
distortion due to excessive drive
What is the correct adjustment for the load or coupling control of a vacuum tube RF power amplifier? -
Answers Maximum power output without exceeding maximum allowable plate current
, Which of the following is a use for the IF shift control on a receiver? - Answers To avoid interference
from stations very close to the receive frequency
What signals are used to conduct a two-tone test? - Answers Two non-harmonically related audio signals
What type of transmitter performance does a two-tone test analyze? - Answers Linearity
Which of the following could be a cause of interference covering a wide range of frequencies? - Answers
Arcing at a poor electrical connection
What sound is heard from an audio device or telephone if there is interference from a nearby single
sideband phone transmitter? - Answers Distorted speech
What is the effect on an audio device or telephone system if there is interference from a nearby CW
transmitter? - Answers On-and-off humming or clicking
What might be the problem if you receive an RF burn when touching your equipment while transmitting
on an HF band, assuming the equipment is connected to a ground rod? - Answers The ground wire has
high impedance on that frequency
What is one good way to avoid unwanted effects of stray RF energy in an amateur station? - Answers
Connect all equipment grounds together
How can a ground loop be avoided? - Answers Connect all ground conductors to a single point
What could be a symptom of a ground loop somewhere in your station? - Answers You receive reports
of 'hum' on your station's transmitted signal
Which of the following is an advantage of a receiver DSP IF filter as compared to an analog filter? -
Answers A wide range of filter bandwidths and shapes can be created
Which of the following describes how a speech processor affects a transmitted single sideband phone
signal? - Answers It increases average power
Which of the following can be the result of an incorrectly adjusted speech processor? - Answers All of
these choices are correct
How much must the power output of a transmitter be raised to change the S meter reading on a distant
receiver from S8 to S9? - Answers Approximately 4 times
What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to
7.178 MHz? - Answers 7.175 to 7.178 MHz
What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to
14.347 MHz? - Answers 14.347 to 14.350 MHz