Serious ‘XM
(That’s W2XM) presents
Exam-Prep
Jepperdee
Tech-exam prep, v. 2
Announcements
go here.
You MUST use the slide-show mode for the program’s
hyperlinks to work properly with MS PwrPt. Operation of the
game is almost intuitive, and you can make up your own rules.
On the game boards: each numeric point value is a
hyperlink which reveals either a question or “Daily Double.”
Whenever you get “Daily Double,” click on either word. “SFJ”
(semi-final jepperdee) and “FJ” (final jepperdee) are also
hyperlinks leading to questions; after selecting SFJ or FJ, click on
the screen until it’s obvious what to do.
Any question slide or answer slide may give you clickable
options at the bottom of the screen. You may take any one of
them. On the answer slide, clicking “back” returns you to the
game board.
For most fun, appropriate hardware (lights, push-buttons,
sounder, lockout circuitry) should be used. A diagram is available
from the author.
Operating Ur Radio
Station
Technology
Rules and
Regs
Give Me a
Number
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
500
500
500
500
SFJ
Analog
Modern
Radio
Troubleshooting
Antenna
Systems
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
500
500
500
500
FJ
What agency
regulates and enforces the rules for
the Amateur Radio
Service in the US?
T1A02
answer
The FCC
another ?, optional, +/- 50 points
back
What is the
Radio Amateur Civil
Emergency
Service?
T2C05
answer
a radio service using
amateur stns for
emergency management or civil defense
communications
back
What does it
mean when a ham
band is said to be
available on a
secondary basis?
T1B08
answer
That amateurs may
not cause harmful
interference to
primary users
more info
back
US amateur activity
is secondary on the
60m band, on part of
the 40m band, and
on the 30m band.
back
When are you
allowed to operate
your amateur station
in a foreign country?
T1C04
hint
answer
FCC rules don’t
apply.
answer
When the foreign
country authorizes
it
back
What is the only
time an amateur
station is allowed
to transmit music?
T1D04
hint (costs 50 points)
answer
This circumstance did not
even exist in the
1950’s
answer
When incidental to
an authorized
retransmission of
manned spacecraft
communications
back
Under which type
of control may the
control op be somewhere other than the
control point?
T1E06
hint (costs 50 points)
answer
Local control,
Automatic control,
Remote control, or
Indirect control
answer
Automatic
control
back
What’s the
approx. change, in
decibels (dB), of a
power decrease
from 12 w to 3 w?
T5B10
answer
6 dB
more info
back
The question pool
says “6 dB;” some
might say
“-6 dB.”
back
How much power
is being used when
an applied 13.8 VDC
causes a current of
10 A?
T5C09
answer
138 watts
gamble 100 points
back
What is the R of
this circuit that
draws 10 A with
13.8 volts applied?
answer
1.38 ohms
back
What value of
resistor has 3 amps
flow through it when
connected to 90v?
T5D04
answer
Be ready to click!
30 ohm
BONUS! Any player can try this!
100 points extra credit for correct
answer; no penalty for incorrect
answer!
Express in kilohm(s).
answer
.03 kilohm
back
What is the
formula for
converting frequency
to wavelength?
T3B06
answer
Wavelength in
meters equals 300
divided by frequency
in megahertz
OR
(click to advance)
λ(m) =
300 / f(MHz)
back
What is the
most common repeater freq. offset
in the 2 mtr band?
T2A01
answer
plus or minus 600
kHz
…now click screen for 50point extra-credit question
with no penalty for wrong
answer
What is the
popular offset for
the 222-MHz
band?
answer
5 MHz
back
When is an
amateur station
required to transmit
its assigned call sign?
T1F03
answer
At least every 10
minutes during a
contact and at the
end of the contact
FOR BONUS, CLICK HERE.
50 points extra credit for correct
answer; no penalty for incorrect
answer.
back
Which phonetic
alphabet must be
used according to
FCC rules?
answer
There is no particular
list specified in the
rules.
back
What term
describes an amateur
station that is transmitting and receiving
on the same freq?
T2B01
answer
Simplex
communication
Extra Info
Repeater stations use
duplex rather than
simplex
back
What should you
do if it is reported that
your 2-mtr sigs were
strong just a moment
ago, but now are weak
or distorted?
T3A01
answer
Try moving a few
feet, as random
reflections may be
causing multi-path
distortion.
more info
back
This only works on
VHF or UHF where
wavelengths are
short
back
What adjustment would be used
to change the voice
pitch of a singlesideband signal?
T4B06
answer
The RIT or
clarifier
Gamble 100 points
back
What do the initials
“RIT” stand for?
answer
Rochester Institute
of Technology or
Receiver
Incremental
Tuning
back
Where must a
filter be installed to
reduce harmonic
emissions?
T4A04
answer
Between the
transmitter and
the antenna
Another wager, this one for 100 points?
back
What is the
meaning of
“harmonic
emissions”?
answer
Emissions at
frequencies which
are integral multiples
of the desired
frequency
back
What term
describes the rate
at which electrical
energy is used?
T5A10
answer
Power
Gamble 100 points
back
Given easily measurable quantities, how
do you compute
power consumed in a
resistor?
answer
P=
2
IR
or
P = IE
back
What type of
component is often
used as an adjustable
volume control?
T6A02
answer
Potentiometer
gamble 100 points
back
Describe the
symbol for a
potentiometer.
answer
A zig-zag line with both
1) a terminal at each
end and 2) an arrow
point (with a terminal)
touching a zig or a zag.
see symbol
Potentiometer
back
How is a semiconductor diode’s
cathode lead
usually identified?
T6B06
answer
With a stripe
Click to bet 100 points
on another question
back
How is a semiconductor diode’s
anode lead usually
identified?
answer
.
absence of a
marking
back
What component
is commonly used to
change household
120VAC to a lower AC
voltage?
T6D06
hint (costs 100 points)
answer
One of these things
has a primary
winding, a core, and
a secondary winding
answer
a Transformer
back
What is meant
by the term
"knife-edge"
propagation?
T3C05
hint costs 50 points
answer
A knife is sharp.
answer
Signals are partially
refracted around
solid objects
exhibiting sharp
edges
back
Semi-final Jepperdee
Topic: Schematic symbols.
Your wager?
Click here for question.
3
2
1
4
5
What’s item 2?
Click here for answer
Transistor
EXTRA credit
to game board 2
For 50 points if you
are correct, what
kind of transistor
(PNP or NPN)?
answer
NPN
(and it’s a bipolar
junction transistor)
To second game board
What is the
function of a
product detector?
T7A01
answer
To Detect CW and
SSB signals
back
What is the
function of a mixer in
a superheterodyne
receiver?
T7A03
answer
to shift the incoming
signal to an
intermediate
frequency
more info
back
All signals are converted to the IF. The
same circuits filter
and optimize them.
back
What is the
primary advantage of
single sideband over
FM for voice
transmissions?
T8A07
answer
SSB signals have
narrower bandwidth
Click here if you want to gamble
200 points
back
What is an advantage
of communicating
using FM?
answer
FM receivers are
insensitive to
amplitude variations
and atmospheric
noise.
back
T6C07
2
What is 8?
3
9
5
4
7
1
6
10
8
answer
Light emitting
diode
Are you willing to gamble
another 400? Yes
No
back
T6C06
2
What is 6?
3
9
5
4
7
1
6
10
8
answer
Capacitor
back
What type of
modulation is most
often used for longdistance voice QSO’s
on VHF/UHF bands?
T8A03
answer
SSB
back
What does the
acronym "BER" mean
when applied to
digital communications systems?
T7B12
answer
Bit Error Rate
Only if you were correct, you
may try for 50 more points
back
Give me “BER”
using the ITU
phonetic
alphabet.
answer
Bravo Echo Romeo
back
Regarding
satellite communications, what is
Doppler shift?
T8B07
answer
A change in observed freq. caused
by relative motion
between the satellite
and the earth station
a familiar example
back
Because of Doppler
shift, the apparent
frequency of a
truck’s horn drops
as the truck passes.
back
What’s the max
power allowed when
xmitting telecommand signals to
r. c. models?
T8C07
hint costs 50 points
answer
It’s quite low
answer
1 watt
back
What emission
modes may be used
by a Technician Class
operator between
219 and 220 MHz?
T8D05
hint costs 50 points
answer
There’s only one.
answer
Data
back
How might
you obtain a list
of active nodes
that use VoIP?
T8C09
answer
From a repeater
directory
back
What does
an SWR reading
of 4:1 mean?
T7C06
answer
An impedance
mismatch
more info
back
An impedance mismatch at a junction
causes a signal to be
partially reflected.
back
What is the
characteristic
appearance of a
"cold" solder joint?
T7D09
answer
A grainy or dull
surface
back
How would you
change a dipole
antenna to make it
resonant on a higher
frequency?
T9A05
hint
answer
Design lengths of antenna elements are
computed to be particular fractions of a
wavelength.
answer
Shorten it
back
What is the
most common
cause for failure of
coaxial cables?
T7C09
answer
Moisture
contamination
This next one should be easy;
‘Care to gamble 200 points?
YES
NO
back
Why should the
outer jacket of coax
cable be resistant
to ultraviolet light?
T7C10
answer
Ultraviolet light can
damage the jacket
and allow water to
enter the cable.
back
What is the commonly accepted value
for the lowest voltage
that can cause a dangerous electric shock?
T0A01
answer
30 volts
Back
What is the impedance of the most
commonly used coax
cable in typical ham
installations?
T9B02
answer
50 ohms
Click to gamble
50 points
back
What is the
impedance of RG-8
coax?
answer
50 ohms
back
What is the
approx. length, in
inches, of a quarterwavelength vertical
ant. for 146 MHz?
T9A08
Hint
answer
A λ/4 vertical for
the 20-m phone
band is slightly less
than 200 inches tall
answer
19 (inches)
back
T6C11
What’s component
4?
4
2
1
3
answer
Antenna
Continue with same player
•
x
Same player, no extra credit:
Without component
#4, what is this
device?
2
1
3
answer
Antenna tuner
back
What is the
purpose of a gin
pole?
T0B05
answer
To lift tower
sections or
antennas
back
“Quad antenna” is
found in the
glossary (Chapter
10). Describe one.
hint
Costs 100 points
answer
For one thing, it usually has more than 1
element for enhanced directivity.
What’s its shape?
answer
Each element is a
square loop, λ/4 on a
side. Each element
is perpendicular to
the quad’s boom.
back
What reading on
an SWR meter indicates a perfect impedance match btwn
feedline & antenna?
T7C04
hint
answer
It is the ratio of
two identical
impedance values.
answer
1:1
back
What could
happen if a person
touched your
antenna while you
were transmitting?
T0CO7
answer
He or she might
receive a painful
RF burn.
back
Final Jepperdee
Topic: cable
characteristics
$$
Your wager?
click here for question
$$
Give me two
reasons for
choosing RG-8
over RG-58.
answer
At a given frequency,
RG-8 has less loss
and greater powerhandling capability
than RG-58.
next
Thanks for playing
Exam-prep
Jepperdee!
Questions, comments,
and/or constructive criticism
would be appreciated.