Radio Shack 2100989 User manual

2100989
User’s Guide
Magnetic-Mount • Stainless Steel
41.3” (105 cm) CB Antenna
Thank you for purchasing your Magnetic-Mount Stainless Steel
CB Antenna from RadioShack. Please read this user’s guide
before installing, setting up, and using your new antenna.
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Package contents
Magnet Base Loading Coil
Stainless Steel Whip Hex Screwdriver
Features
• Attachesontoyourcar’strunklidoranyatmetalsurface
• Nodrillingrequired
User’s
Guide
Quick Start

3
1 Select Location
1. Selectaconvenientatsurfacelocationfortheantenna
base.Makesuretheantenna:
• doesnotblockthedriver’sview.
• doesnotinterferewithwindshieldwiperoperation.
2. Cleanthesurfacetoremovedirt.
2 Install Antenna
1. Screwtheloadingcoilsectionoftheantennaontothe
threadofthemountingmagnetbase.
2. Placethemagnetbaseontoyourcar.
3. Routethecoaxcableintothecar,preferablythrougha
window.
Ifroutedthroughthetrunkoradooropening,tapethe
cablesecurelytothedoorframeusingacloth-backedtape.
Cablewillnormallynotbeharmedbyopeningandclosing
thewindow,door,ortrunk.
Ensurethatthecableisnotcrushedordeformed.
4. RunthecabletoyourCBtransceiverandconnectthe
coaxplugtothetransceiverantennaconnector(seeyour
transceiver’sinstructions).
nNotes:
• Do not remove the foil covering the bottom of the
magnet structure. The foil protects car finish and
makes a good “capacitive” ground.
• DO NOT SHORTEN THE COAX CABLE as it is the
proper length set for peak performance.

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3Adjust Antenna
Thelengthofthewhiphasbeensetforbestperformance
ofmostreceiversoperatingonthe27MHzband.IfanSWR
(standingwaveratio)meterisavailable,youcanfurther
optimizetheoverallefciencyofthesystembyfollowingthe
antennaadjustmentinstructions.
1. FollowtheSWRmeter’sinstructionstoconnectittoyour
antennacable.
2. Settheselectortochannel20.

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3. Loosenthecolletholdingthewhip.Usetheincludedhex
screwdrivertoturntheallenheadsetscrewatthetopof
thewhipbasecounterclockwise.
4. Adjustthewhipelementuntilitisapproximatelyhalfway
downinthewhipbase.
5. Pressthetransmitswitchandobservethemeterreading
(refertoyourSWRmeter’suser’sguideformoredetailson
usingthemeter).
6. Raisethewhipelementbyapproximately1/8”increments
toseeifthemeterreadingcanbereduced.Repeatthe
procedurestartingfromthecenterpositionandlowering
theelement.
DifferentSWRreadingsmaybefoundwhentheantennais
locatedatdifferentpoints.Determineexperimentally,by
trialanderror,justwheretheantennamustbemounted
toprovidethelowestSWRreading.Readingsbelow2are
acceptableformostinstallations.
WATT 10W FWD PWR
100W REF SWR
A
N
T
T
R
A
N
S
SWR
FS
1
2 4 6 8 10
3
12
2
4
6
810
SWR Meter
Allen Head
Set Screw
1/8”

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wWarning:
• Themagneticmountantennahasbeentestedtowithstand
normal high speed driving. The magnet will hold securely
unless ice, dirt or other obstructions prevent the flat
antenna base from seating properly. Always make sure
the antenna base is on a clean, flat, painted or unpainted
metal surface. The mount will not hold on non-metallic or
aluminum surfaces.
• Vinyltopsreducemagneticholdingpowerandarenot
recommended.
• Roadgrimeandcorrosionoccurswithallmobileantennas.
It is good to clean the metal connection parts periodically
(every 3 to 6 months) with a wire brush to maintain low SWR
readings.
Specications
Frequencyrange....................................... CB:26.965-27.405Mhz
Impedance......................................................................... 50ohms
VSWRlimitation............................................................2.0:1orless
Maxpower...........................................................................50watts
Cable..............................................16.4ft(5m)RG58Ucoaxcable
Connectors.......................................................... PL259connector
Whipheight..................................................... 35.25inch(89.5cm)
OverallHeight..................................................... 41.3inch(105cm)
Specicationsaresubjecttochangeandimprovementwithoutnotice.
Actualproductmayvaryfromtheimagesfoundinthisdocument.
Limited Warranty
RadioShackwarrantsthisproductagainstdefectsinmaterialsandworkmanshipunder
normalusebytheoriginalpurchaserforninety (90) days afterthedateofpurchase
fromaRadioShack-ownedstoreoranauthorizedRadioShackfranchiseeordealer.
RADIOSHACKMAKESNOOTHEREXPRESSWARRANTIES.
Thiswarrantydoesnotcover:(a)damageorfailurecausedbyorattributabletoabuse,
misuse,failuretofollowinstructions,improperinstallationormaintenance,alteration,acci-

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dent,ActsofGod(suchasoodsorlightning),orexcessvoltageorcurrent;(b)improper
orincorrectlyperformedrepairsbypersonswhoarenotaRadioShackAuthorizedService
Facility;(c)consumablessuchasfusesorbatteries;(d)ordinarywearandtearorcosmetic
damage;(e)transportation,shippingorinsurancecosts;(f)costsofproductremoval,
installation,set-upservice,adjustmentorreinstallation;and(g)claimsbypersonsother
thantheoriginalpurchaser.
Shouldaproblemoccurthatiscoveredbythiswarranty,taketheproductandthe
RadioShacksalesreceiptasproofofpurchasedatetoanyRadioShackstoreintheU.S.
RadioShackwill,atitsoption,unlessotherwiseprovidedbylaw:(a)repairtheproduct
withoutchargeforpartsandlabor;(b)replacetheproductwiththesameoracomparable
product;or(c)refundthepurchaseprice.Allreplacedpartsandproducts,andproductson
whicharefundismade,becomethepropertyofRadioShack.Neworreconditionedparts
andproductsmaybeusedintheperformanceofwarrantyservice.Repairedorreplaced
partsandproductsarewarrantedfortheremainderoftheoriginalwarrantyperiod.You
willbechargedforrepairorreplacementoftheproductmadeaftertheexpirationofthe
warrantyperiod.
RADIOSHACKEXPRESSLYDISCLAIMSALLWARRANTIESANDCONDITIONSNOT
STATEDINTHISLIMITEDWARRANTY.ANYIMPLIEDWARRANTIESTHATMAYBE
IMPOSEDBYLAW,INCLUDINGTHEIMPLIEDWARRANTYOFMERCHANTABILITYAND,
IFAPPLICABLE,THEIMPLIEDWARRANTYOFFITNESSFORAPARTICULARPURPOSE,
SHALLEXPIREONTHEEXPIRATIONOFTHESTATEDWARRANTYPERIOD.
EXCEPTASDESCRIBEDABOVE,RADIOSHACKSHALLHAVENOLIABILITYOR
RESPONSIBILITYTOTHEPURCHASEROFTHEPRODUCTORANYOTHERPERSONOR
ENTITYWITHRESPECTTOANYLIABILITY,LOSSORDAMAGECAUSEDDIRECTLYOR
INDIRECTLYBYUSEORPERFORMANCEOFTHEPRODUCTORARISINGOUTOFANY
BREACHOFTHISWARRANTY,INCLUDING,BUTNOTLIMITEDTO,ANYDAMAGES
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REVENUE,ORPROFITANDANYINDIRECT,SPECIAL,INCIDENTAL,ORCONSEQUEN-
TIALDAMAGES,EVENIFRADIOSHACKHASBEENADVISEDOFTHEPOSSIBILITYOF
SUCHDAMAGES.
SomeStatesdonotallowlimitationsonhowlonganimpliedwarrantylastsorthe
exclusionorlimitationofincidentalorconsequentialdamages,sotheabovelimitationsor
exclusionsmaynotapplytoyou.Thiswarrantygivesyouspeciclegalrights,andyoumay
alsohaveotherrightswhichvaryfromStatetoState.YoumaycontactRadioShackat:
RadioShackCustomerRelations
300RadioShackCircle,FortWorth,TX76102  04/08
www.RadioShack.com
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Printed 
inTaiwan 06B10 2100989
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