serious ‘xm (that’s w2xm) presents exam-prep jepperdee tech-exam prep, v. 2
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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Serious ‘XM(That’s W2XM) presents
Exam-Prep JepperdeeTech-exam prep, v. 2
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Announcements go here.
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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.
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Rules and Regs
Give Me a Number
Operating UrStation
Radio Technology
100 100 100 100
200 200 200 200
300 300 300 300
400 400 400 400
500 500 500 500 SFJ
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Analog Modern Radio
Trouble-shooting
Antenna Systems
100 100 100 100
200 200 200 200
300 300 300 300
400 400 400 400
500 500 500 500 FJ
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T1A02 What agency regulates and en-
forces the rules for the Amateur Radio Service in the US?
answer
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The FCC
another ?, optional, +/- 50 points back
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T2C05 What is the Radio Amateur Civil
Emergency Service?
answer
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a radio service using amateur stns for
emergency manage-ment or civil defense
communications back
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T1B08 What does it mean when a ham band is said to be
available on a secondary basis?
answer
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That amateurs may not cause harmful
interference to primary users
more info back
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US amateur activity is secondary on the
60m band, on part of the 40m band, and on the 30m band.
back
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T1C04 When are you allowed to operate
your amateur station in a foreign country?
hint answer
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FCC rules don’t apply.
answer
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When the foreign country authorizes
it back
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T1D04 What is the only time an amateur station is allowed
to transmit music?
hint (costs 50 points) answer
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This circum-stance did not
even exist in the 1950’s
answer
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When incidental to an authorized
retransmission of manned spacecraft
communicationsback
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T1E06 Under which type of control may the
control op be some-where other than the
control point? hint (costs 50 points) answer
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Local control,Automatic control,Remote control, or
Indirect control answer
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Automatic control
back
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T5B10 What’s the approx. change, in decibels (dB), of a power decrease
from 12 w to 3 w?
answer
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6 dB
more info back
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The question pool says “6 dB;” some
might say “-6 dB.”
back
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T5C09 How much power is being used when an applied 13.8 VDC causes a current of
10 A?
answer
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138 watts
gamble 100 points back
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What is the R of this circuit that draws 10 A with
13.8 volts applied?answer
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1.38 ohms
back
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T5D04 What value of resistor has 3 amps
flow through it when connected to 90v?
answer
Be ready to click!
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30 ohmBONUS! Any player can try this!
100 points extra credit for correct answer; no penalty for incorrect
answer!
Express in kilohm(s). answer
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.03 kilohm
back
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T3B06 What is the formula for
converting frequency to wavelength?
answer
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Wavelength in meters equals 300
divided by frequency in megahertz
OR (click to advance)
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λ(m) = 300 / f(MHz)
back
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T2A01 What is the most common re-peater freq. offset in the 2 mtr band?
answer
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plus or minus 600 kHz
…now click screen for 50-point extra-credit question with no penalty for wrong
answer
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What is the popular offset for
the 222-MHz band?
answer
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5 MHz
back
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T1F03 When is an amateur station
required to transmit its assigned call sign?
answer
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At least every 10 minutes during a
contact and at the end of the contact
FOR BONUS, CLICK HERE.50 points extra credit for correctanswer; no penalty for incorrect
answer. back
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Which phonetic alphabet must be
used according to FCC rules?
answer
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There is no particular list specified in the
rules.
back
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T2B01 What term describes an amateur station that is trans-mitting and receiving
on the same freq? answer
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Simplex communication
Extra Info
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Repeater stations use duplex rather than
simplex
back
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T3A01 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?
answer
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more info back
Try moving a few feet, as random
reflections may be causing multi-path
distortion.
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back
This only works on VHF or UHF where wavelengths are
short
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T4B06 What adjust-ment would be used to change the voice
pitch of a single-sideband signal?
answer
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The RIT or clarifier
Gamble 100 points back
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What do the initials “RIT” stand for?
answer
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Rochester Institute of Technology or
Receiver Incremental
Tuning back
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T4A04 Where must a filter be installed to
reduce harmonic emissions?
answer
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Between the transmitter and
the antenna
Another wager, this one for 100 points? back
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What is the meaning of “harmonic
emissions”? answer
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Emissions at frequencies which
are integral multiples of the desired
frequencyback
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T5A10 What term describes the rate at which electrical
energy is used?answer
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Power
Gamble 100 points back
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Given easily measur-able quantities, how
do you compute power consumed in a
resistor?
answer
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P = I2R
or
P = IE
back
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T6A02 What type of component is often
used as an adjustable volume control?
answer
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Potentiometer
gamble 100 points back
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Describe the symbol for a
potentiometer.answer
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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
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Potentiometer
back
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T6B06 How is a semi-conductor diode’s
cathode lead usually identified?
answer
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With a stripe
Click to bet 100 points on another question back
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How is a semi-conductor diode’s anode lead usually
identified?answer
.
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absence of a marking
back
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T6D06 What component is commonly used to
change household 120VAC to a lower
AC voltage?
hint (costs 100 points) answer
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One of these things has a primary
winding, a core, and a secondary winding
answer
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a Transformer
back
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T3C05 What is meant by the term "knife-edge" propagation?
hint costs 50 points answer
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A knife is sharp.
answer
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Signals are partially refracted around
solid objects exhibiting sharp
edges
back
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Semi-final Jepperdee
Topic: Schematic symbols.
Your wager?
Click here for question.
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What’s item 2?Click here for answer
12
3
4
5
12
3
4
5
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Transistor
EXTRA credit to game board 2
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For 50 points if you are correct, what kind of transistor
(PNP or NPN)?answer
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NPN
(and it’s a bipolar junction transistor)
To second game board
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T7A01 What is the function of a
product detector?
answer
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To Detect CW and SSB signals
back
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T7A03 What is the function of a mixer in
a superheterodyne receiver?
answer
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to shift the incoming signal to an
intermediate frequency
more info back
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All signals are con-verted to the IF. The
same circuits filter and optimize them.
back
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T8A07 What is the primary advantage of single sideband over
FM for voice transmissions?
answer
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SSB signals have narrower bandwidth
Click here if you want to gamble back200 points
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What is an advantage of communicating
using FM?
answer
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FM receivers are insensitive to
amplitude variations and atmospheric
noise.back
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T6C07 What is 8?
answer
1
2 5
4
3
6
7
8
9
10
1
2 5
4
3
6
7
8
9
10
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Light emitting diode
Are you willing to gamble backanother 400? Yes No
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T6C06 What is 6?
answer
1
2 5
4
3
6
7
8
9
10
1
2 5
4
3
6
7
8
9
10
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Capacitor
back
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T8A03 What type of modulation is most often used for long-distance voice QSO’s on VHF/UHF bands?
answer
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SSB
back
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T7B12 What does the acronym "BER" mean
when applied to digital communi-cations systems?
answer
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Bit Error Rate
Only if you were correct, you may try for 50 more points back
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Give me “BER” using the ITU
phonetic alphabet.
answer
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Bravo Echo Romeo
back
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T8B07 Regarding satellite commu-nications, what is
Doppler shift?answer
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A change in ob-served freq. caused by relative motion
between the satellite and the earth station
a familiar example back
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Because of Doppler shift, the apparent
frequency of a truck’s horn drops
as the truck passes.back
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T8C07 What’s the max power allowed when
xmitting tele-command signals to
r. c. models? hint costs 50 points answer
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It’s quite low
answer
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1 watt
back
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T8D05 What emission modes may be used by a Technician Class
operator between 219 and 220 MHz?
hint costs 50 points answer
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There’s only one.
answer
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Data
back
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T8C09 How might you obtain a list of active nodes that use VoIP?
answer
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From a repeater directory
back
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T7C06 What does an SWR reading
of 4:1 mean?
answer
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An impedance mismatch
more info back
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An impedance mis-match at a junction causes a signal to be partially reflected.
back
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T7D09 What is the characteristic
appearance of a "cold" solder joint?
answer
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A grainy or dull surface
back
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T9A05 How would you change a dipole
antenna to make it resonant on a higher
frequency?hint answer
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Design lengths of an-tenna elements are
computed to be par-ticular fractions of a
wavelength.answer
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Shorten it
back
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T7C09 What is the most common
cause for failure of coaxial cables?
answer
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Moisture contamination
This next one should be easy; ‘Care to gamble 200 points?
YES NO back
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T7C10 Why should the outer jacket of coax cable be resistant to
ultraviolet light?answer
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Ultraviolet light can damage the jacket and allow water to
enter the cable. back
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T0A01 What is the com-monly accepted value for the lowest voltage that can cause a dan-gerous electric shock?
answer
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30 volts
Back
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T9B02 What is the im-pedance of the most commonly used coax cable in typical ham
installations?answer
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50 ohms
Click to gamble50 points back
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What is the impedance of RG-8
coax?
answer
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50 ohms
back
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T9A08 What is the approx. length, in
inches, of a quarter-wavelength vertical ant. for 146 MHz?
Hint answer
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A λ/4 vertical for the 20-m phone
band is slightly less than 200 inches tall
answer
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19 (inches)
back
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T6C11 What’s component 4?
answer
1
2
3
4
1
2
3
4
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Antenna
Continue with same player
•x
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Same player, no extra credit:
Without component #4, what is this device?
answer
1
2
3
4
1
2
3
4
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Antenna tuner
back
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T0B05 What is the purpose of a gin
pole?answer
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To lift tower sections or antennas
back
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“Quad antenna” is found in the
glossary (Chapter 10). Describe one.
hintCosts 100 points answer
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For one thing, it usu-ally has more than 1
element for en-hanced directivity. What’s its shape?
answer
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Each element is a square loop, λ/4 on a side. Each element is perpendicular to the quad’s boom.
back
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T7C04 What reading on an SWR meter indi- cates a perfect im-
pedance match btwn feedline & antenna?
hint answer
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It is the ratio of two identical
impedance values.
answer
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1:1
back
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T0CO7 What could happen if a person
touched your antenna while you were transmitting?
answer
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He or she might receive a painful
RF burn.
back
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Final Jepperdee
Topic: cable characteristics
$$ Your wager? $$click here for question
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Give me two reasons for
choosing RG-8 over RG-58.
answer
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At a given frequency, RG-8 has less loss
and greater power-handling capability
than RG-58.next
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Thanks for playing Exam-prep Jepperdee!
Questions, comments, and/or constructive criticism
would be appreciated.
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