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Transcript
Serious ‘XM
(aka W2XM)
presents
Exam-Prep Jepperdee:
General-Class Edition
Operation of the game is almost intuitive, and you
can make up your own rules. Each numeric point value
on either game board is a hyperlink which reveals
either a question or the Daily Double banner. Advancing
the game one slide past the question (by clicking the
screen) displays the answer. “Back” on the answer slide
returns you to the game board. “SFJ” stands for “semifinal jepperdee” and “FJ” means “final jepperdee;”
proceed by clicking screen until you see the next
hyperlink. There is one Daily Double on each board;
click on “Here.”
For most fun, appropriate hardware (lights, pushbuttons, sounder, lockout circuitry) should be used. A
simple diagram is given on the next slide.
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
DIGITAL
ANTENNAS & PROPAGATION ELECTRICAL &
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
G1B05
When may music be
transmitted by an
amateur station?
When it is an
incidental part of a
manned space craft
retransmission
back
What is the
customary minimum
frequency separation
between SSB signals
under normal condx?
G2B05
Approximately
3 kHz
back
Why do most
amateur stations use
LSB on the 160meter, 75-meter, and
40-meter bands?
G2A09
Current amateur
practice is to use
lower sideband on
these frequency
bands.
back
G2C03
What does it mean
when a CW
operator sends
"KN" at the end of a
transmission?
Listening only for
a specific station
or stations
back
G2D08
What is a reason
why many
amateurs keep a
station log?
To help with a
reply if the FCC
requests
information
back
Volunteer
Examiners are
accredited by what
organization?
G1D07
A Volunteer
Examiner
Coordinator
back
Which band allows
communication on
only specific
channels, rather than
frequency ranges?
G1A04
60
meters
back
What are the restrictions on the use
of abbreviations or
procedural signals in
the Amateur Service?
G1B07
They may be used
if they don’t
obscure the
meaning of a
message.
back
What is the max.
bandwidth for Am.
Radio stns xmitting
on USB frequencies
in the 60-m band?
G1C03
2.8 kHz
back
What types of
msgs for a third party
in another country
may be transmitted
by an amateur stn?
G1E05
Only remarks of personal character, msgs
about HamRadio, or
msgs about emergencies or disaster relief
back
Why must the
cases of some large
power transistors be
insulated from
ground?
G6A08
To avoid shorting
the collector or
drain voltage to
ground
back
What is the total
resistance of three
100-ohm resistors in
parallel?
G5C04
33.3 ohms
back
G5A02
What is
reactance?
Opposition to the
flow of alternating
current caused by
capacitance or
inductance
back
What item of
test equipment
contains horizontal
and vertical
channel amplifiers?
G4B01
an oscilloscope
back
What would be the
RMS voltage across a
50 ohm dummy load
dissipating 1200
G5B12
watts?
245 volts
back
What’s the name
of the process that
varies the freq. of an
RF wave to convey
information?
G8A03
Frequency
modulation
back
For what mode is
a Class C PA stage
appropriate for a
modulated signal?
G7B11
CW
back
Assuming a ground
rod is used, what might
be the problem if you
get RF burns by touching equipment which is
transmitting on HF?
G4C05
The ground wire
has high
impedance on
that frequency
back
When using 3 kHz
wide LSB, how close to
the lower edge of the
40-m phone segment
should your displayed
carrier frequency be?
G4D10
At least 3 kHz
above the edge of
the segment
back
What type of ckt is
used in many FM
receivers to convert
signals coming from
the IF amp. to audio?
G7C08
Discriminator
back
When are messages
sent via digital modes
exempt from Part 97
third party rules that
apply to other modes of
communication?
G1E12
Never
back
What segment
of the 20-meter
band is most often
used for digital
transmissions?
G2E04
14.070 - 14.100
MHz
back
What is indicated
on a waterfall display
by one or more
vertical lines adjacent
to a PSK31 signal?
G2E11
Overmodulation
back
G8B05
What is the approx.
bandwidth of a
PACTOR3 or
WINMOR signal at
maximum data rate?
2300 Hz
back
How does the
receiving station
respond to an ARQ
data mode packet
containing errors?
G8C07
It requests the
packet be
retransmitted
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
purpose of a
gamma match used
with Yagi
antennas?
G9C11
To match the
relatively low feed
point impedance
to 50 ohms
back
Where should the
radial wires of a
ground-mounted
vertical antenna
system be placed?
G9B06
On the surface of
the Earth or buried
a few inches below
the ground
back
What is an
advantage of
vertical stacking of
horiz.-polarized
Yagi antennas?
G9D05
It narrows the
main lobe in
elevation
back
If the SWR on a feed
line is 5:1, and a matching network at the
xmitter is adjusted to a
1:1 SWR, what is the
SWR on the feed line?
G9A08
5 to 1
back
What happens to
signals with freq.
below the MUF and
above the LUF when
they are sent into the
ionosphere?
G3B05
They are bent
back to the Earth
back
G3C03
Why is the F2
region mainly
responsible for the
longest-distance
radio propagation?
Because it is the
highest
ionospheric
region
back
G3A05
What is the
solar flux
index?
A measure of
solar radiation at
10.7 centimeters
wavelength
back
G3B08
What does MUF
stand for?
The maximum
usable frequency
for communication
between two
points
back
What kind of propagation allows working
a station too far for
ground wave but too
near for normal skywave propagation?
G3C09
Scatter
back
G0B03
What size fuse or ckt
breaker would be
appropriate to use
with a ckt that uses
AWG # 14 wiring?
15 amperes
back
G0B12
What is the
purpose of a
power supply
interlock?
To ensure that
dangerous voltages
are removed if the
cabinet is opened
back
What does "time
averaging" mean in
reference to RF
radiation
exposure?
G0A04
The total RF
exposure averaged
over a certain time
back
What type of
instrument can be
used to accurately
measure an RF
field?
G0A09
A calibrated field
strength meter
with a calibrated
antenna
back
What precaution
should you take
when you make adjustments or repairs to an antenna?
G0A12
Turn off the
transmitter and
disconnect the
feed line
back
DAILY DOUBLE!!!
Player makes
wager; host
clicks HERE for
question.
You missed! Try
again.
here
DAILY DOUBLE!!!
Player makes
wager; host
clicks HERE for
question.
You missed! Try
again.
here
Semi-final Jepperdee
TOPIC:
NOMENCLATURE
YOUR WAGER?
(next click yields question)
What is the name
of the device used to
match xmtr output
impedance to a
different impedance?
G4A06
(Click here for THINK music.)
What is the name
of the device used to
match xmtr output
impedance to a
different impedance?
G4A06
(Click here for answer.)
Antenna coupler or
antenna tuner
To game 2 board
Final Jepperdee
TOPIC:
SAFETY
YOUR WAGER?
(next click yields question)
Why shouldn’t
soldered joints be used
with the wires that
connect the base of a
tower to a system of
ground rods?
G0B09
(Click here for THINK music)
Why shouldn’t
soldered joints be used
with the wires that
connect the base of a
tower to a system of
ground rods?
G0B09
(Click here for answer)
A soldered joint
will likely be
destroyed by the
heat of a lightning
strike
We hope Examprep Jepperdee
was helpful!
Comments? Suggestions?