Serious

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Serious XM(aka W2XM)presents

• Exam-Prep Jepperdee
• General-Class Edition

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Procedures Practices Rules and Regulations Components and Circuits Radio Signals Equipment
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ANTENNAS XMSN LINES PROPAGATION ELECTRICAL RF SAFETY VOCABULARY
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G8B10 What does the number 31 represent in PSK31?

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The approximate transmitted symbol rate
back
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 G2A04 Which mode is most commonly used for
voice on the 17- and 12-meter bands?

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Upper sideband
back
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  G2B05 Under normal conditions, what is
the minimum fre-quency separation between SSB
signals?

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Approx. 3 kHz
back
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G2C07 When sending CW, what does a C mean
when added to the RST report?

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Chirpy or unstable signal
back
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G2E04 (B) What segment of the 20-meter band is
most often used for data transmissions?

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14.070 - 14.100 MHz
back
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G1B03 For what purpose might a radio amateur
operate a beacon station?

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Observation of propagation and reception
back
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G2D05 Whens it permis-sible to communicate
with stations in coun-tries outside areas
administered by FCC?

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When contact is with hams in countries whose
administrations do not object
back
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G1E01 What would dis-qualify a 3rd party from
participating in stating a message over amateur
radio?

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The third partys amateur license had ever been
revoked
back
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G1A04 What amateur band permits only
channelized ham operation?

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60 meters
back
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G1B06 When is an ama- teur station permit-ted to
transmit secret codes?

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To control a space station
back
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G5B03 How many watts of electrical power are
used if 400 VDC is supplied to an 800-ohm load?

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200 watts
back
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G5B06 What is the PEP output from a xmtr if an
oscope measures 200 volts p-p across a 50-ohm
dummy?

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100 watts
back
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G5A02 What is reactance?

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Opposition to the flow of alternating current
caused by capacitance or inductance
back
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G6C02 What is meant by the phrase MMIC?

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Monolithic Microwave Integrated Circuit
back
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G7B03 What is the output of a 2-input AND gate
when both inputs are high?

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high
back
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 G8B11 How does FEC allow the receiver to correct
errors in received data packets?

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By transmitting redundant information with the
data
back
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G8A12 What signal(s) would be found at the output
of a properly adjusted balanced modulator?

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Both upper and lower sidebands
back
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G4A03 What is normally meant by operating a
transceiver in "split" mode?

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The transceiver is set to different transmit and
receive frequencies
back
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G7C01 In an SSB xmtr, in what kind of circuit
is the output of the balanced modulator processed
before going to the mixer?

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Filter
back
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G7B12 Of choices A, B, AB, and C, which
amplifier class is the most efficient?

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Class C
back
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G4E02 What is the purpose of a "corona ball"
on a HF mobile antenna?  

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To reduce high voltage discharge from the tip of
the antenna
back
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G9C02 What is the approximate length of the
driven element of a Yagi antenna?

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1/2 wavelength
back
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 G9C16 How does the gain of a 2-element
delta-loop compare to the gain of a two-el quad
antenna?

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About the same

• back

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G9D10 Describe a Beverage antenna.  

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A very long and low directional receiving antenna
back
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G4A06 What device is often used to match the
xmtr output to other than 50 ohms?

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Antenna coupler

• back

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 G2D06 How is a directional antenna pointed when
making a long-path contact with another station?

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180 degrees from its short-path heading

• back

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G3B05 What happens to sigs. with frequencies
between LUF and MUF when they go into the
ionosphere?

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They are bent back to the Earth

• back

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G3A10 What causes HF propagation conditions to
vary periodically in a 28-day cycle?

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The Suns rotation on its axis

• back

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G3B06 What usually happens to signals with
frequencies below the Lowest Usable Frequency?

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They are completely absorbed by the ionosphere

• back

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G3C09 What allows a signal to be detected at a
distance too far for ground wave but too near for
normal sky-wave propagation?

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Scatter

• back

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G0B02 What is the min. wire size that may be
safely used for a circuit that draws up to 20 A
continuously?

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AWG number 12

• back

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 G0B09 Why should soldered joints not be used
with the wires that connect the base of a tower
to a system of ground rods?

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A soldered joint will be destroyed by the heat
of a lightning strike

• back

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G0A09 What type of instrument can be used to
accurately measure an RF field?

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A calibrated field-strength meter with a
calibrated antenna

• back

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G0B08 What should be done by any person preparing
to climb a tower that supports electrical devices?

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Make sure all circuits that supply power to the
tower are locked out and tagged

• back

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G0A01 How does RF energy affect human body
 tissue?

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It heats body tissue

• back

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isotropic antenna  

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An antenna that radiates and/or receives equally
in all directions

• back

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The basic unit of inductance

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Henry

• back

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local oscillator

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an oscillator that generates one of the input
signals to a mixer

• back

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Solar cycle

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the 10.7-year periodic variation in solar
activity

• back

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A resistor with a precise temperature coeffient
that allows it to be used as a temperature sensor

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thermistor

• back

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DAILY DOUBLE Your wager? Heres the question

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DAILY DOUBLE Your wager? Heres the question

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The 3 connections on a quarter-inch stereo phone
plug are called tip, ring, and what?

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sleeve

• To game 2 board

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Besides induc-tance, what electrical quantity
exists in a coil that is self-resonant?  

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capacitance

• Next slide

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We hope Exam-prep Jepperdee was
helpful! Comments? Suggestions?