Transcript Exam-Prep Jepperdee: Technician Edition

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 a question. Advancing the game
one slide past a question (by clicking the screen) displays
its answer. Clicking “Back” on the answer slide returns
you to the game board. “SFJ” stands for “semi-final
jepperdee” and “FJ” means “final jepperdee.” There is
one daily double on each board; click on “Here’s the
question.”
The game host should know this slide show’s details
thoroughly before showing it to an audience. For most
fun, appropriate hardware (lights, push-buttons, sounder,
lockout circuitry) should be used. A diagram appears on
the last slide.
Procedures
& Practices
Rules and
Regulations
Components
and Circuits
Radio Sigs;
Equipment
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
500
500
500
500
SFJ
ANTENNAS &
XMSN LINES
PROPAGATION
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
500
500
500
500
ELECTRIC’L & RF
SAFETY
VOCAB
FJ
What is the relationship between
transmitted symbol
rate and
bandwidth?
G8B10
Higher symbol
rates require wider
bandwidth
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 sigs?
G2B05
Approx. 3 kHz
back
G2C07
On 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 digital
transmissions?
G2E04
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 may one
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
has ever been revoked and not
reinstated
back
Which amateur
band is restricted
to communication
on only specific
channels?
G1A04
60 meters
back
When is an
amateur station
permitted to
transmit secret
codes?
G1B06
To control a space
station
back
How much
electrical pwr is
used if 400 VDC is
supplied to an 800ohm load?
G5B03
200 watts
back
What is the PEP
output from a xmtr if
an o’scope measures
200 v p-p across a 50ohm dummy?
G5B06
100 watts
back
G5A02
What is reactance?
Opposition to the
flow of alternating
current caused by
capacitance or
inductance
back
G6B02
What is meant by
the phrase MMIC?
Monolithic
Microwave
Integrated Circuit
back
What is the
output of a 2-input
AND gate when
both inputs are
high?
G7B03
high
back
G7B14
Describe a linear
amplifier.
An amplifier in
which the output
preserves the
input waveform
back
What type circuit
is used in many FM
receivers to convert
sigs coming from the
IF amplifier to audio?
G7C08
Discriminator
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 or
antenna tuner
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
How might a skywave signal sound
if it arrives by both
short path and long
path propagation?
G3B01
A well-defined
echo might be
heard.
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
Why should
soldered joints not be
used with the wires
that connect the base
of a tower to a system
of ground rods?
G0B09
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
What do we call an
antenna that radiates
and/or receives
equally in all
directions?
isotropic antenna
back
What is the name
of the basic unit of
inductance?
Henry
back
What is a local
oscillator?
an oscillator that
generates one of
the input signals to
a mixer
back
Define
“solar cycle.”
the 10.7-year
periodic variation
in solar activity
back
What name is given
to a resistor with a
precise temperature
coefficient and used
as a temp. sensor?
thermistor
back
Click here for next slide
DAILY DOUBLE
Your wager?
Here’s the question…
Click here for next slide
DAILY DOUBLE
Your wager?
Here’s the question…
Semi-final Jepperdee
TOPIC:
NOMENCLATURE
YOUR WAGER?
(next click yields question)
The 3 connections
on a ¼-inch stereo
phone plug are
called “tip,” “ring,”
and what? (begin 30 sec)
The 3 connections
on a ¼-inch stereo
phone plug are
called “tip,” “ring,”
and what?
(click for answer)
sleeve
To game 2 board
Final Jepperdee
TOPIC:
RESONANCE
YOUR WAGER?
(next click yields question)
Besides inductance,
what electrical
quantity exists in a
coil that is selfresonant? (begin 30 sec)
Besides inductance,
what electrical
quantity exists in a
coil that is selfresonant? (click for answer)
capacitance
Next slide
We hope Examprep Jepperdee
was helpful!
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