Do you know Series - 9

1. What is a coaxial cable?

A. Two wires side-by-side in a plastic ribbon
B. Two wires side-by-side held apart by insulating rods
C. Two wires twisted around each other in a spiral
D. A center wire inside an insulating material covered by a
metal sleeve or shield
2. A mobile radio may be operated at home with the
addition o which piece o e!uipment?
A. An alternator
B. A power supply
C. A linear amplifier
D. A rhombic antenna
". What may cause a bu##in$ or hum in the si$nal o an
%& transmitter?
A. Using an antenna that is the wrong length
B. Energy from another transmitter
C. Bad design of the transmitters !" power output circuit
D. A bad filter capacitor in the transmitters power supply
'. What is the amateur station acti(ity known as ox huntin$?
A. Attempting to locate a hidden transmitter by using receivers
and direction-finding techni#ues
B. Attempting to locate a hidden receiver by using receivers
and direction-finding techni#ues
C. Assisting government agents with trac$ing transmitter
collars worn by fo%es
D. Assembling stations using generators and portable antennas
to test emergency communications s$ills
). * you answer someone on the air and then complete your
communication without $i(in$ your call si$n+ what type o
communication ha(e you ,ust conducted?
A. Test transmission
B. Tactical signal
C. &ac$et communication
D. Unidentified communication
-. %ow many watts o electrical power are used by a 12-.D/
li$ht bulb that draws 0.2 amperes?
A. '( watts
B. )* watts
C. ' watts
D. ).* watts
1. What are the recei(in$ and retransmittin$ re!uency
bands used or 2ode .34 in amateur satellite operations?
A. +atellite receiving on *,- to *,. /01 and
retransmitting on 2** to 2*. /01
B. +atellite receiving on 2** to 2*. /01 and
retransmitting on Amateur bands in the range of )2 to ,( /01
C. +atellite receiving on 2** to 2*. /01 and retransmitting
on *,- to *,. /01
D. +atellite receiving on *,- to *,. /01 and transmitting
on )2 to ,( /01
5. %ow ast does a radio wa(e tra(el throu$h space 6in a (acuum7?
A. At the speed of light
B. At the speed of sound
C. 3ts speed is inversely proportional to its wavelength
D. 3ts speed increases as the fre#uency increases
9. What must you transmit to identiy your amateur station?
A. 4our 5handle5
B. 4our call sign
C. 4our first name and your location
D. 4our full name
10. Which o the ollowin$ one-way communications may
89: be transmitted in the amateur ser(ice?
A. Telecommand to model craft
B. Broadcasts intended for reception by the general public
C. Brief transmissions to ma$e ad6ustments to the station
D. /orse code practice
11. What do ;::<+ 2orse code+ A2:9; and packet
communications ha(e in common?
A. They are multipath communications
B. They are digital communications
C. They are analog communications
D. They are only for emergency communications
12. Dependin$ on the wa(elen$th o the si$nal+
the ener$y density o the ;& ield+ and other actors+
in what way can ;& ener$y aect body tissue?
A. 3t heats body tissue
B. 3t causes radiation poisoning
C. 3t causes the blood count to reach a dangerously low level
D. 3t cools body tissue
1". What is the correct way to call /= when usin$ (oice?
A. +ay 5C75 once8 followed by 5this is85 followed by your call
sign spo$en three times
B. +ay 5C75 at least five times8 followed by 5this is85
followed by your call sign spo$en once
C. +ay 5C75 three times8 followed by 5this is85 followed by
your call sign spo$en three times
D. +ay 5C75 at least ten times8 followed by 5this is85
followed by your call sign spo$en once
1'. Where should you connect the chassis o each piece
o your station e!uipment to best protect a$ainst
electrical shock?
A. To insulated shoc$ mounts
B. To the antenna
C. To a good ground connection
D. To a circuit brea$er
1). What instrument is used to measure standin$ wa(e ratio?
A. An ohmmeter
B. An ammeter
C. An +9! meter
D. A current bridge
1-. * si$nals rom your transmitter are causin$ ront-end
o(erload in your nei$hbor>s tele(ision recei(er+ who is
responsible or takin$ care o the intererence?
A. 4ou alone are responsible8 since your transmitter is
causing the problem
B. Both you and the owner of the television receiver
share the responsibility
C. The "CC must decide if you or the owner of the
television receiver are responsible
D. The owner of the television receiver is responsible
11. What ormula shows how (olta$e+ current and
resistance relate to each other in an electric circuit?
A. :hms ;aw
B. <irchhoffs ;aw
C. Amperes ;aw
D. Teslas ;aw
15. *n what direction does a (ertical antenna send out
radio ener$y?
A. /ost of it goes in two opposite directions
B. /ost of it goes high into the air
C. /ost of it goes e#ually in all hori1ontal directions
D. /ost of it goes in one direction
19. What item o test e!uipment contains
hori#ontal- and (ertical-channel ampliiers?
A. An ohmmeter
B. A signal generator
C. An ammeter
D. An oscilloscope
20. What determines the ree-space polari#ation o an antenna?
A. The orientation of its magnetic field =0 "ield>
B. The orientation of its free-space characteristic impedance
C. The orientation of its electric field =E "ield>
D. 3ts elevation pattern
Do you know Series - 5
Another 20 =uestions or all to try out ?
1. Having established contact on a calling frequency it is good practice to:
=a> stay on the same fre#uency
=b> move to another fre#uency
=c> invite others to 6oin in on the same fre#uency
=d> be ob6ectionable to all others calling
2. The purpose of a terrestrial repeater is to:
=a> increase satellite coverage
=b> increase the range of mobile stations
=c> increase the range of fi%ed stations
=d> minimise contacts by pedestrian stations
3. The Q-code for 'standby' is:
=a> 7!?
=b> 7!/
=c> 7!+
=d> 7!@
. !"#$ using the phonetic alphabet %ould be:
=a> Charlie8 :scar8 3ndia8 ;ima
=b> Charlie8 :cean8 3taly8 ;ima
=c> Coil8 :scar8 3nductance8 ;ondon
=d> Charlie8 :scar8 3taly8 ;ondon
&. The 'and (lans should be observed because:
=a> they are mandatory
=b> they are governed by international regulations
=c> they are intended to aid operating
=d> they are only for novices
). #t is good safety practice to:
=a> use plastic piping for earthing
=b> unearth all metal cases
=c> have no master switch
=d> supply all mains power via a master switch
*. +hen calling a station it is good practice to:
=a> put your callsign first
=b> use your callsign only
=c> put the callsign of the station being called first
=d> use the callsign of the other station only
,. #n the -.T code T is for:
=a> temperature of &A stage
=b> tone
=c> time of transmission
=d> transmitter type
/. To prevent annoying other users on a band0 a trans1itter should al%ays be tuned
initially:
=a> on a harmonic outside the band
=b> into an antenna
=c> into a dummy load
=d> into a dipole
12. T%o 123+ resistors are connected in parallel across a &4 5! supply. The total
current ta3en is:
=a> -(mA
=b> (.-mA
=c> 2mA
=d> 2 A
11. The diagra1 represents a trace on an oscilloscope. +hat is the frequency of the
displayed %avefor16
=a> 2$01
=b> -$01
=c> 2($01
=d> 2(($01
12. #n the diagra1 in question 110 %hat is the pea3 to pea3 value of the %avefor16
=a> 2A
=b> )A
=c> 2(A
=d> )(A
13. 7s the frequency rises0 the reactance of an inductor:
=a> stays constant
=b> decreases
=c> increases
=d> does none of these
1. The resonant frequency of the circuit is:
=a> 2.-B2--$01
=b> 2-.B2--$01
=c> 2-B.2--$01
=d> 2-B2.--$01
1&. 7 po%er gain of is equivalent to:
=a> ,dB
=b> 'dB
=c> 2(dB
=d> 2'dB
1). +hat type of Transistor is sho%n in the follo%ing diagra16
=a> &?&
=b> B?&
=c> ?&?
=d> &?B
1*. #f the base potential of an 8(8 transistor is held at the e1itter potential0 the collector
current %ill be:
=a> 1ero
=b> always 2A
=c> between 2(mA and
=d> very high
1,. The output i1pedance of an e1itter-follo%er buffer a1plifier is:
=a> infinite
=b> very high
=c> 1ero
=d> fairly low
1/. The circuit sho%n belo% depicts:
=a> an audio amplifier
=b> an !" amplifier
=c> a mi%er
=d> a B":
22. The circuit in question 1/ operates in %hat type of (o%er output 1ode 6
=a> Class A
=b> Class AB
=c> Class B
=d> Class C
Adapted rom 4@ Amateur ;adio pro,ect website
Sunday, June 05, 2005
Are you ready or 1 Aune ?
This is the sample Test that we used during the 2 day !AE !evision Class on the
)./ay(-.
Total -( #uestions and passing mar$s is -( C.
1. The 71ateur .ervice 1ay be briefly defined as:
a. a private radio service for personal gain and public benefit
b. a public radio service used for public service communications
c. a radiocommunication service for the purpose of self training8 intercommunication and
technical investigation
d. a private radio service intended only for emergency communications
2. 9or regulatory purposes the %orld is divided into regions each %ith different radio
spectru1 allocations.:alaysia is in :
a. !egion 2
b. !egion )
c. !egion ,
d. !egion *
3. 7n a1ateur radio licence can be inspected by an authorised officer fro1 the :!:!
a. at any time
b. on any business day
c. before B p.m.
d. only on public holidays
. ;ou 1ust have an a1ateur radio licence to:
a. transmit on public-service fre#uencies
b. retransmit shortwave broadcasts
c. repair radio e#uipment
d. transmit in bands allocated to the Amateur +ervice
&. 7 :alaysia a1ateur radio licence allo%s you to operate:
a. anywhere in the world
b. anywhere in /alaysia and in any other country that has a reciprocal recognition of the
licence
c. within -( $m of your home station location
d. only at your home address
). +ith an a1ateur radio licence0 you 1ay operate trans1itters in your station:
a. one at a time
b. one at a time8 e%cept for emergency communications
c. any number at one time
d. any number8 so long as they are transmitting on different bands
*. ;ou 1ust 3eep the follo%ing docu1ent at your a1ateur station:
a. your amateur radio licence with its attached schedule
b. a copy of the !ules and !egulations for the Amateur +ervice
c. a copy of the !adio Amateurs 0andboo$ for instant reference
d. a chart showing the amateur radio bands
,. 7n 71ateur .tation is one %hich is:
a. licensed by the /C/C to operate on the amateur radio bands
b. owned and operated by a person who is not engaged professionally in radio
communications
c. used e%clusively to provide two-way communication in connection with activities of
amateur sporting organi1ations
d. used primarily for emergency communications during floods8 earth#ua$es and similar
disasters.
/. #f the licensed operator of an a1ateur radio station is absent overseas0 the ho1e
station 1ay be used by:
a. any member of the immediate family to maintain contact with only the licensed
operator
b. any person with an appropriate amateur radio licence
c. the immediate family to communicate with any amateur radio operator
d. the immediate family if a separate licence for mobile use has been obtained by the
absent operator
12. 'efore operating an a1ateur station in a 1otor vehicle0 you 1ust:
a. give the D&D vehicles licence plate number
b. inform the /C/C
c. hold a current amateur radio licence
d. obtain an additional licence and callsign
11. #f you trans1it fro1 another a1ateur's station0 the person responsible for its proper
operation is:
a. both of you
b. the other amateur =the station licensee>
c. you8 the operator
d. the station licensee8 unless the station records show that you were the operator at the
time
12. 7 log-boo3 for recording a1ateur stations being operated:
a. is compulsory for every amateur radio operator
b. is recommended for all amateur radio operators
c. must list all messages sent
d. must record time in UTC
13. The 1ini1u1 age for a person to appy for an -7< $icence is:
a. 2) years
b. 2' years
c.2* years
d. there is no age limit
1. #f you contact another station and your signal is strong and perfectly readable0 you
should:
a. turn on your speech processor
b. reduce your +9!
c. not ma$e any changes8 otherwise you may lose contact
d. reduce your transmitter power output to the minimum needed to maintain contact
1&. (ea3 envelope po%er =(<(> output for 4H9 !lass ' licence is :
a. *(9
b. -(9
c. ,(9
d. )-9
1).;ou identify your a1ateur station by trans1itting your:
a. 5handle5
b. callsign
c. first name and your location
d. full name
1*. These letters are used for :alaysian !allsigns
a. B9
b. B!
c. B<
d. BU
1,. To re1ain current0 an a1ateur radio licence fee 1ust be paid:
a. every ' months up to 2 year
b. every year for a ma% of - years
c. once every - years
d. one fee lasts for life
1/. :essages fro1 an a1ateur station in one of the follo%ing are e?pressly forbidden:
a. A+C33
b. 3nternational ?o. ) code
c. Baudot code
d. secret cipher
22. The ter1 @har1ful interference@ 1eans:
a. interference which obstructs or repeatedly interrupts radiocommunication services
b. an antenna system which accidentally falls on to a neighbours property
c. a receiver with the audio volume unacceptably loud
d. interference caused by a station of a secondary service
21. +hen interference to the reception of radioco11unications is caused by the
operation of an a1ateur station0 the station operator:
a. must immediately comply with any action re#uired by the /C/C to prevent the
interference b. may continue to operate with steps ta$en to reduce the interference when
the station operator can afford it
c. may continue to operate without restrictions
d. is not obligated to ta$e any action
22. 7n a1ateur radio operator 1ay 3no%ingly interfere %ith another radio
co11unication or signal:
a. when the operator of another station is acting in an illegal manner
b. when another station begins transmitting on a fre#uency you already occupy
c. never
d. when the interference is unavoidable because of crowded band conditions
23. The ele1ent .ilicon is:
a. a conductor
b. an insulator
c. a superconductor
d. a semiconductor
2. These 1agnetic poles repel:
a. unli$e
b. li$e
c. positive
d. negative
2&. This 1aterial is better for 1a3ing a per1anent 1agnet:
a. steel
b. copper
c. aluminium
d. soft iron
2). The ter1 describing opposition to electron flo% in a 1etallic circuit is:
a. current
b. voltage
c. resistance
d. power
2*. Three good electrical conductors are:
a. copper8 gold8 mica
b. gold8 silver8 wood
c. gold8 silver8 aluminium
d. copper8 aluminium8 paper
2,. The na1e for the flo% of electrons in an electric circuit is:
a. voltage
b. resistance
c. capacitance
d. current
2/. "ne 3iloh1 is:
a. 2( ohm
b. (.(2 ohm
c. (.((2 ohm
d. 2((( ohm
32. The %att is the unit of:
a. power
b. magnetic flu%
c. electromagnetic field strength
d. brea$down voltage
31. The unit for potential difference bet%een t%o points in a circuit is the:
a. ampere
b. volt
c. ohm
d. coulomb
32. The unit of resistance is the:
a. farad
b. watt
c. ohm
d. resistor
33. The voltage across a resistor carrying current can be calculated using the for1ula:
a. E E 3 F ! Gvoltage e#uals current plus resistanceH
b. E E 3 - ! Gvoltage e#uals current minus resistanceH
c. E E 3 % ! Gvoltage e#uals current times resistanceH
d. E E 3 I ! Gvoltage e#uals current divided by resistanceH
3. # A <B- is a 1athe1atical equation describing:
a. :hms ;aw
b. Thevenins Theorem
c. <irchoffs "irst ;aw
d. <irchoffs +econd ;aw
3&. 7 current of 2 a1pere flo%s through a 1) oh1 resistance. The applied voltage is:
a. . volt
b. 2* volt
c. 2. volt
d. ,) volt
3). +hen an , oh1 resistor is connected across a 12 volt supply the current flo% is:
a. 2) I . amps
b. . I 2) amps
c. 2) - . amps
d. 2) F . amps
3*. The total resistance of several resistors connected in series is:
a. less than the resistance of any one resistor
b. greater than the resistance of any one resistor
c. e#ual to the highest resistance present
d. e#ual to the lowest resistance present
3,. 9ive 12 oh1 resistors connected in series give a total resistance of:
a. 2 ohm
b. - ohms
c. 2( ohms
d. -( ohms
3/. The correct na1e for the equivalent of 'one cycle per second' is one:
a. henry
b. volt
c. hert1
d. coulomb
2. "ne 1egahertC is equal to:
a. (.(((2 01
b. 2(( $01
c. 2((( $01
d. 2( 01
1. The total capacitance of t%o or 1ore capacitors in series is:
a. always less than that of the smallest capacitor
b. always greater than that of the largest capacitor
c. found by adding each of the capacitances together
d. found by adding the capacitances together and dividing by their total number
2. 9ilter capacitors in po%er supplies are so1eti1es connected in series to:
a. withstand a greater voltage than a single capacitor can withstand
b. increase the total capacity
c. reduce the ripple voltage further
d. resonate the filter circuit
3. 7 radio co1ponent is identified as a capacitor if its value is 1easured in:
a. microvolts
b. millihenrys
c. megohms
d. microfarads
. Three 1& picofarad capacitors are %ired in parallel. The value of the co1bination is:
a. *- picofarad
b. 2. picofarad
c. 2) picofarad
d. - picofarad
&. #ncreasing the nu1ber of turns on an inductor %ill 1a3e its inductance:
a. decrease
b. increase
c. remain unchanged
d. become resistive
). The unit of inductance is the:
a. farad
b. henry
c. ohm
d. reactance
*. T%o 22 uH inductances are connected in series. The
total inductance is:
a. 2( u0
b. )( u0
c. *( u0
d. .( u0
,. ;ou can safely re1ove an unconscious person fro1 contact %ith a high voltage
source by:
a. pulling an arm or a leg
b. wrapping the person in a blan$et and pulling to a safe area
c. calling an electrician
d. turning off the high voltage and then removing the person
/. 9or your safety0 before chec3ing a fault in a 1ains operated po%er supply unit0 first:
a. short the leads of the filter capacitor
b. turn off the power and remove the power plug
c. chec$ the action of the capacitor bleeder resistance
d. remove and chec$ the fuse in the power supply
&2. #n the trans1itter0 the @49"@ is a :
a. voice fre#uency oscillator
b. varactor fi%ed oscillator
c. virtual fa1e oscillator
d. variable fre#uency oscillator
posted by B9)++D at 'J(2 &/ K ) comments
Do you know Series - 1
Table 1 - International Q-Code (Extract from UK RAE)
=;B
9hat is my e%act fre#uencyL
4our e%act fre#uency is......$01
=;%
Does my fre#uency varyL
4our fre#uency varies
=;*
9hat is the tone of my transmissionL
The tone of your transmission is .. =amateur T2- TB>
=;@
9hat is the readability of my signalsL
The readability of your transmission is... =amateur !2 - !->
=;C
Are you busyL
3 am busy. &lease do not interfere.
=;2
Are you being interfered withL
3 am being interfered with.
=;8
Are you troubled by staticL
3 am troubled by static.
=;9
+hall 3 increase powerL
3ncrease power.
=;D
+hall 3 decrease powerL
Decrease power.
=;:
+hall 3 stop sendingL
+top sending
=;4
0ave you anything for meL
3 have nothing for you.
=;.
Are you readyL
3 am ready.
=;E
9hen will you call me againL
3 will call you again =at .... hours.>
=;F
9ho is calling meL
4ou are being called by ......... =on ....$01>
=SA
9hat is the strength of my signalsL
The strength of your signals is ..... =amateur +2 - +B>
=SG
Are my signals fadingL
4our signals are fading.
=SD
3s my $eying defectiveL
4our $eying is defective.
=SC
Can you give me ac$nowledgement of receiptL
3 give you my ac$nowledgment of receipt.
=S9
Can you communicate with..... direct =or by relay> L
3 can communicate with .... direct =or by relay through...>
=SD
9ill you relay to....L ..
3 will relay to.....
=S<
+hall 3 change to another fre#uencyL
Change to another fre#uency =or to .....$01>
=:%
9hat is your locationL ...
/y location is....
=:;
9hat is the correct timeL
The correct time is ..... hours
Table 2 Use of Q-Codes as nouns
=;B
"re#uency
=;@
+ignal strength I !eadability
=SC
Aerification card
=S9
!adio contact
=S<
Change of fre#uency
=:%
;ocation
=;:
Close down
=;E
+tand by
=SG
"ading
=;2
3nterference from other stations
=;8
3nterference from atmospherics
=SD
!elay message electrical apparatus
=;9
0igh power
=;D
;ow power
Thursday, May 26, 2005
Do you know Series - -
Do you $now thatJ
Upon switching on your amateur radio8 you are re#uired to listen on the fre#uency to
ensure that it is free8 before you can operate your radioL
To 6oin the conversation if its not free8 you are to give them your callsign during the
pause period8 and not use the word 5brea$5 or 5contact5L
9hen operating through a repeater8 the order of priority should be as tabulated belowJ
9irst - +tations relayingItransmitting emergency or distress message
.econd - +tations using low power or handsets
Third - +tations that are /obile
9ourth - +tations that are at Base or high powered handsets
&rohibited Transmissions
Communications relating to anti governmentIreligionIpoliticsIbusiness and racial
issuesIother issues that are sensitive to the people of /alaysia.
?o transmission of musicM communications intended to facilitate a criminal actM messages
in codes or ciphers intended to obscure the meaning thereofM messages containing
profane8 offensive8 obscene or indecent words of any language.
?o engagement in any form of broadcasting for sending news8 advertisements for
percuniary reward for and on behalf of a third party.
4ou should not use the amateur radio apparatus such as to disrupt the usage of the
amateur radio fre#uency or any other acts which can cause interference with other
services.
4ou should not retransmit programs or signals from any types of radio station other than
an amateur station8 e%cept weather forecast information intended for use by the general
public and originated from a /alaysian Novernment station.
7dapted fro1 :!:! 71ateur -adio Duidelines
Tuesday, May 24, 2005
Do you know Series - )
Do you $now thatL
2. Amateur radio operators are not allowed to do anything
with their radios that generate financial income.
). Amateur radio operators are prohibited from broadcasting
to the public. The Amateur radio transmission is meant to be
received by other radio amateur operatorsIstations only.
,. There are , types of Amateur +tation Apparatus Assignment
under Amateur !adio Category.
a> Amateur +tation Apparatus Assignment Class A
b> Amateur +tation Apparatus Assignment Class B
c> Amateur !epeater +tation
*. The minimun age for a candidate to apply for the !AE
is 2* years old8 and 2. years for the C9 testL
-. The A+AA must be displayed as near to the e#uipment
as possibleL
'. The +tation ;og Boo$ must be provided to record J
a> Dates of all transmissions
b> Time of commencement and ending of all contacts made
c> "re#uency O band usedIClass or mode of transmission
d> &ower output
e> Call +ignsIcontact name or handle made
f> Details of test caried out
g> ;ocations when operations are from any temporary locations
h> +erialised numbered records in paper or electronic forms
P. The definitions of BaseI/obileI&ortable +tations
Base - +tation being operated from A+AA ;icence address
/obile - +tations being operated while moving8 such as in a car
&ortable - +tation being operated away from registered address
for certain period of time
Earth - +tation being wor$ed with amateur radio satellites
.. The word 5brea$5 should never be used to 6oin a conversation
in progress
B. The word 5brea$5 is only used to deliver emergency traffic
2(. !adio operators are re#uired to give a , second pause
within the audio message. At least one , second pause be
given in any 2 minute length message
Friday, May 20, 2005
Do you know Series - '
1. * the licensed operator o an amateur radio station is
absent o(erseas+ the home station may be used byH
a. any member of the immediate family to maintain contact
with only the licensed operator
b. any person with an appropriate amateur radio licence
c. the immediate family to communicate with any amateur
radio operator
d. the immediate family if a separate licence for mobile use
has been obtained by the absent operator
2. * you contact another station and your si$nal is stron$
and perectly readable+ you shouldH
a. turn on your speech processor
b. reduce your +9!
c. not ma$e any changes8 otherwise you may lose contact
d. reduce your transmitter power output to the minimum
needed to maintain contact
". <ou identiy your amateur station by transmittin$ yourH
a. 5handle5
b. callsign
c. first name and your location
d. full name
'. :he 2orse code si$nal S9S is sent by a stationH
a. with an urgent message
b. in grave and imminent danger and re#uiring immediate
assistance
c. ma$ing a report about a shipping ha1ard
d. sending important weather information
). * you hear distress traic and are unable to render
assistance+ you shouldH
a. maintain watch until you are certain that assistance is
forthcoming
b. enter the details in the log boo$ and ta$e no further action
c. ta$e no action
d. tell all other stations to cease transmitting
-. :he term Iharmul intererenceI meansH
a. interference which obstructs or repeatedly interrupts
radiocommunication services
b. an antenna system which accidentally falls on to a
neighbours property
c. a receiver with the audio volume unacceptably loud
d. interference caused by a station of a secondary service
1. :he re!uency band 1'- to 1'5 2%# isH
a. shared with other communication services
b. allocated e%clusively for police communications
c. e%clusive to repeater operation
d. reserved for emergency communications
5. An element which alls somewhere between bein$ an
insulator and a conductor is called aH
a. &-type conductor
b. intrinsic conductor
c. semiconductor
d. ?-type conductor
9. An electric current passin$ throu$h a wire will produce
around the conductorH
a. an electric field
b. a magnetic field
c. an electrostatic field
d. nothing
10.&our $ood electrical insulators areH
a. plastic8 rubber8 wood8 carbon
b. glass8 wood8 copper8 porcelain
c. paper8 glass8 air8 aluminium
d. glass8 air8 plastic8 porcelain
11.9ne kilohm isH
a. 2( ohm
b. (.(2 ohm
c. (.((2 ohm
d. 2((( ohm
12.:he watt is the unit oH
a. power
b. magnetic flu%
c. electromagnetic field strength
d. brea$down voltage
1".:he (olta$e across a resistor carryin$ current can be
calculated usin$ the ormulaH
a. E E 3 F ! Gvoltage e#uals current plus resistanceH
b. E E 3 - ! Gvoltage e#uals current minus resistanceH
c. E E 3 % ! Gvoltage e#uals current times resistanceH
d. E E 3 I ! Gvoltage e#uals current divided by resistanceH
1'.A current o 2 ampere lows throu$h a 1- ohm resistance.
:he applied (olta$e isH
a. . volt
b. 2* volt
c. 2. volt
d. ,) volt
1).:his combination o series resistors could replace a
sin$le 120 ohm resistorH
a. five )* ohm
b. si% )) ohm
c. two ') ohm
d. five 2(( ohm
Thursday, May 19, 2005
Do you know Series - "
Can you remember the resistor colour codesL
posted by B9)++D at 'J,P A/ K ( comments
Wednesday, May 18, 2005
Do you know Series - 2
What term describes the process o combinin$ an inormation si$nal with a radio
si$nal?
A. +uperposition
B. /odulation
C. Demodulation
D. &hase-inversion
What would be the (olta$e across a )0-ohm dummy load dissipatin$ 1200 watts?
A. 2P, volts
B. )*- volts
C. ,*' volts
D. 'B) volts
What does ;S: mean in a si$nal report?
A. !ecovery8 signal strength8 tempo
B. !ecovery8 signal speed8 tone
C. !eadability8 signal speed8 tempo
D. !eadability8 signal strength8 tone
What is a ma$netic ield?
A. Current through the space around a permanent magnet
B. The space through which a magnetic force acts
C. The space between the plates of a charged capacitor8 through
which a magnetic force acts
D. The force that drives current through a resistor
* two resistors are connected in series+ what is their total resistance?
A. The difference between the individual resistor values
B. Always less than the value of either resistor
C. The product of the individual resistor values
D. The sum of the individual resistor values
What is parallel-conductor eed line?
A. Two wires twisted around each other in a spiral
B. Two wires side-by-side held apart by insulating material
C. A center wire inside an insulating material that is covered
by a metal sleeve or shield
D. A metal pipe that is as wide or slightly wider than a
wavelength of the signal it carries
What does it mean to say that a repeater has an input and an output re!uency?
A. The repeater receives on one fre#uency and transmits on another
B. The repeater offers a choice of operating fre#uency8 in case one is busy
C. :ne fre#uency is used to control the repeater and another is used to
retransmit received signals
D. The repeater must receive an access code on one fre#uency before retransmitting
received signals
What is the characteristic impedance o lat-ribbon :.-type twin-lead?
A. -( ohms
B. P- ohms
C. 2(( ohms
D. ,(( ohms
Why does a dummy antenna pro(ide an ;& sae en(ironment or transmitter
ad,ustin$?
A. The dummy antenna carries the !" energy far away from the station
before releasing it
B. The !" energy is contained in a halo around the outside of the dummy antenna
C. The !" energy is not radiated from a dummy antenna8 but is converted to heat
D. The dummy antenna provides a perfect match to the antenna feed impedance
Which potential does the $reen wire in a three-wire electrical plu$ represent?
A. ?eutral
B. 0ot
C. 0ot and neutral
D. Nround
Do you know Series - 1
What type o (olta$e re$ulator limits the (olta$e drop across its ,unction when a
speciied current passes throu$h it in the re(erse-breakdown direction?
A. A Qener diode
B. A three-terminal regulator
C. A bipolar regulator
D. A pass-transistor regulator
What test instrument would be useul to measure D/ resistance?
A. An oscilloscope
B. A spectrum analy1er
C. A noise bridge
D. An ohmmeter
What is the purpose o repeater operation?
A. To cut your power bill by using someone elses higher power system
B. To help mobile and low-power stations e%tend their usable range
C. To transmit signals for observing propagation and reception
D. To communicate with stations in services other than amateur
When uses are installed in 12-(olt D/ wirin$+ where should they be placed?
A. At the radio
B. /idway between voltage source and radio
C. "uses arent re#uired for 2)-volt DC e#uipment
D. At the voltage source
Where would you connect an SW; meter to measure standin$ wa(e ratio?
A. Between the feed line and the antenna
B. Between the transmitter and the power supply
C. Between the transmitter and the receiver
D. Between the transmitter and the ground
* si$nals rom your transmitter are causin$ ront-end o(erload in your nei$hbor>s
tele(ision recei(er+ who is responsible or takin$ care o the intererence?
A. 4ou alone are responsible8 since your transmitter is causing the problem
B. Both you and the owner of the television receiver share the responsibility
C. The "CC must decide if you or owner of the television receiver are responsible
D. The owner of the television receiver is responsible
* a dial marked in kilohert# shows a readin$ o 112) k%#+ what would it show i it
were marked in me$ahert#?
A. (.((P2)- /01
B. P.2)- /01
C. P2.)- /01
D. P82)-8((( /01
What is the basic unit o electromoti(e orce 6J2&7?
A. The volt
B. The watt
C. The ampere
D. The ohm
* a radio wa(e makes "+12)+000 cycles in one second+ what does this mean?
A. The radio waves voltage is ,P)- $ilovolts
B. The radio waves wavelength is ,P)- $ilometers
C. The radio waves fre#uency is ,P)- $ilohert1
D. The radio waves speed is ,P)- $ilometers per second
* you ha(e a hand-held transcei(er with an output o 2)0 milliwatts+ how many
watts would this be?
A. (.(2
B. )-
C. (.)-
D. (.2)-
What is the basic unit o resistance?
A. The volt
B. The watt
C. The ampere
D. The ohm
What is the basic unit o electrical power?
A. The ohm
B. The watt
C. The volt
D. The ampere
*n &i$ure below+ what is the name o element " o the <a$i antenna?
A. Director
B. !eflector
C. Boom
D. Driven element
*n &i$ure below+ which symbol represents a sin$le-pole+ double- throw switch?
A. +ymbol 2
B. +ymbol )
C. +ymbol ,
D. +ymbol *
*n &i$ure below+ which symbol represents a D8D transistor?
A. +ymbol 2
B. +ymbol )
C. +ymbol ,
D. +ymbol *
/ourtesy o J-%am.net
oo! out for t"e next series comin# u$%
Amateur ;adio
Things you need to know about
What is Amateur Radio?
Amateur Radio, also affectionately known as "ham radio", is
the hobby of constructing, experimenting and communicating
via radio.
Amateur radio fans communicate with each other around the
world via a set number of radio frequencies.
When was Amateur Radio started?
Amateur Radio is as old as radio itself. n !"!#, the American
$ongress passed the first laws regulating radio transmissions
in the %&. 'y !"!(, amateur experimenters were
communicating nationwide and setting up a system to relay
messages from coast to coast. n )alaysia, amateur radio was
the precurser to commercial radio broadcast.
What can I do with Amateur Radio?
%nlike other communications technologies, Amateur Radio
allows you to communicate from virtually anywhere* +ou can
communicate from the top of a mountain, your home or behind
the wheel of your car. +ou can take the radio wherever you go.
n times of disaster -such as the recent Tsunami., when regular
communncations channels fail, "hams" can swing into action
assisting emergency communication efforts and work with
public service agencies . Amateur Radio operators can talk to
&huttle astronauts or bounce signals off the moon for wider
area coverage. Amateur Radio operators can also transmit
images and files digitally. /now of any other hobby with so
much to offer0
I don't have a lot of time. Can I still enjoy the hobby?
+ou bet* The beauty of operating an Amateur Radio is that it
can fit the time, space and budget that you decide is right for
you. ts got that low stress, high fun ratio that so many busy
people seek in their off1hours. t can also be great family fun or
a solitary pleasure.
What will this cost me?
A basic new hand1held radio can cost about the same as an
inexpensive !"1inch T2. A new tabletop multi1band unit can
cost about the same as a 3$. )aterials to get you started are
relatively inexpensive and the exam fee you4ll pay when you4re
ready to test, is nominal. Alternatively, if you are inclined to
experiment, as most Amateur Radio 5perators are, you can
build your own Amateur Radio %nit.
Who can help me out?
Amateur Radio clubs are located all over the country and are
eager to help newcomers. )any of these clubs have their own
websites, which contain a large amount of information on the
hobby. 5ne example of such a site is the one hosted by the
)alaysian Amateur Radio Transmitters4 &oceity -")ART&". at
http677www.marts.org.my -now web site is inactive., or unoffical
websites such as www.martsnews.blogspot.com
and this site.
How do I become an Amateur Radio operator
5nly certified Amateur Radio operators can operate Amateur
Radio equipment. n order to get a certificate, you should be
above !( years old, a )alaysian $iti8en and have passed any
of the following6
Radio theory and understanding of Radio Regulations for
$lass ' $ertificate, or
Radio theory, understanding of Radio Regulations and
)orse $ode Test for $lass A $etificate.
Are there any fees payable?
+es, you have to pay an annual fee for the $ertificate. The fee
for $lass A $ertificate is R)9:, while for $lass ' $erificate is
R)#(.
Adapted fro Suruhan!aya "ouni#asi dan Mu$tiedia
Ma$aysia $eaf$et
";#&&<
Do you know the ;S: /ode :able ?
Readability
R1 %nreadable
R2 'arely readable, occasional words distinguishable
R3 Readable with considerable difficulty
R4 Readable with practically no difficulty
R5 3erfectly readable
i!nal tren!th
S1 =aint, signals barely perceptible
S2 2ery weak signals
S3 ;eak signals
S4 =air signals
S5 =airly good signals
S7 )oderately strong signals
S8 &trong signals
S9 >xtremly strong signals
"one #used in CW reportin!$
! 1 A$ hum, very loud and broad
# 1 2ery rugh ac, very harsh and broad
9 1 Rough ac tone, rectified but not filtered
( 1 Rough note, some trace of filtering
? 1 =iltered rectified ac but strong ripple modulated
: 1 =iltered tonem definite trace of ripple modlation
@ 1 Aear pure tone, trace of ripple modulation
B 1 near perfect tone, slight trace of modulation
" 1 3erfect tone, no trace of ripple or modulation of any kind