Transcript Exam-Prep Jepperdee: Technician Edition

Serious ‘XM
(aka W2XM)
presents
Exam-Prep Jepperdee:
General-Class Edition
Procedures
& Practices
Rules and
Regulations
Components
and Circuits
Radio Signals
& Equipment
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
500
500
500
500
SFJ
ANTENNAS & PROPAGATION ELECTRICAL & VOCABULARY
XMSN LINES
RF SAFETY
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
500
500
500
500
FJ
G8B10
What does the
number 31
represent in
PSK31?
The approximate
transmitted symbol
rate
back
Which mode is
most commonly used
for voice on the 17and 12-meter bands?
G2A04
Upper sideband
back
Under normal
conditions, what is
the minimum frequency separation
between SSB signals?
G2B05
Approx. 3 kHz
back
G2C07
When sending CW,
what does a “C”
mean when added
to the RST report?
Chirpy or unstable
signal
back
What segment
of the 20-meter
band is most often
used for data
transmissions?
G2E04 (B)
14.070 - 14.100
MHz
back
G1B03
For what purpose
might a radio
amateur operate a
beacon station?
Observation of
propagation and
reception
back
When’s it permissible to communicate
with stations in countries outside areas
administered by FCC?
G2D05
When contact is
with hams in
countries whose
administrations do
not object
back
G1E01
What would disqualify a 3rd party
from participating in
stating a message
over amateur radio?
The third party’s
amateur license
had ever been
revoked
back
G1A04
What amateur
band permits only
channelized ham
operation?
60 meters
back
G1B06
When is an amateur station permitted to transmit
secret codes?
To control a space
station
back
How many watts
of electrical power
are used if 400 VDC
is supplied to an
800-ohm load?
G5B03
200 watts
back
G5B06
What is the PEP
output from a xmtr if
an o’scope measures
200 volts p-p across a
50-ohm dummy?
100 watts
back
G5A02
What is reactance?
Opposition to the
flow of alternating
current caused by
capacitance or
inductance
back
G6C02
What is meant by
the phrase MMIC?
Monolithic
Microwave
Integrated Circuit
back
G7B03
What is the output
of a 2-input AND
gate when both
inputs are high?
high
back
G8B11
How does FEC allow
the receiver to
correct errors in
received data
packets?
By transmitting
redundant
information with
the data
back
G8A12
What signal(s) would
be found at the
output of a properly
adjusted balanced
modulator?
Both upper and
lower sidebands
back
G4A03
What is normally
meant by operating
a transceiver in
"split" mode?
The transceiver is
set to different
transmit and
receive frequencies
back
In an SSB xmtr, in
what kind of circuit is
the output of the
balanced modulator
processed before going
to the mixer?
G7C01
Filter
back
G7B12
Of choices A, B, AB,
and C, which
amplifier class is the
most efficient?
Class C
back
What is the
purpose of a
"corona ball" on a
HF mobile
antenna?
G4E02
To reduce high
voltage discharge
from the tip of the
antenna
back
What is the
approximate length
of the driven
element of a Yagi
antenna?
G9C02
1/2 wavelength
back
G9C16
How does the gain of
a 2-element deltaloop compare to the
gain of a two-el quad
antenna?
About the same
back
G9D10
Describe a
Beverage antenna.
A very long and low
directional
receiving antenna
back
What device is
often used to
match the xmtr
output to other
than 50 ohms?
G4A06
Antenna coupler
back
G2D06
How is a directional
antenna pointed
when making a
“long-path” contact
with another station?
180 degrees from
its short-path
heading
back
What happens to
sigs. with frequencies
between LUF and
MUF when they go
into the ionosphere?
G3B05
They are bent
back to the Earth
back
G3A10
What causes HF
propagation
conditions to vary
periodically in a 28day cycle?
The Sun’s rotation
on its axis
back
What usually
happens to signals
with frequencies
below the Lowest
Usable Frequency?
G3B06
They are
completely
absorbed by the
ionosphere
back
What allows a signal
to be detected at a
distance too far for
ground wave but too
near for normal skywave propagation?
G3C09
Scatter
back
What is the min.
wire size that may be
safely used for a
circuit that draws up
to 20 A continuously?
G0B02
AWG number 12
back
G0B09
Why should soldered
joints not be used with
the wires that connect
the base of a tower to a
system of ground rods?
A soldered joint
will be destroyed
by the heat of a
lightning strike
back
What type of
instrument can be
used to accurately
measure an RF
field?
G0A09
A calibrated fieldstrength meter
with a calibrated
antenna
back
G0B08
What should be done
by any person
preparing to climb a
tower that supports
electrical devices?
Make sure all
circuits that supply
power to the tower
are locked out and
tagged
back
G0A01
How does RF
energy affect
human
body tissue?
It heats body
tissue
back
isotropic antenna
An antenna that
radiates and/or
receives equally
in all directions
back
The basic unit of
inductance
Henry
back
local oscillator
an oscillator that
generates one of
the input signals
to a mixer
back
Solar cycle
the 10.7-year
periodic variation
in solar activity
back
A resistor with a
precise temperature
coeffient that allows
it to be used as a
temperature sensor
thermistor
back
DAILY DOUBLE
Your wager?
Here’s the question…
DAILY DOUBLE
Your wager?
Here’s the question…
The 3 connections
on a quarter-inch
stereo phone plug
are called “tip,”
“ring,” and what?
sleeve
To game 2 board
Besides inductance, what
electrical quantity
exists in a coil that
is self-resonant?
capacitance
Next slide
We hope Examprep Jepperdee
was helpful!
Comments? Suggestions?