Yageo Pulse LARSEN LM Series User manual

LM Series
Mobile Antennas
The Larsen mount, the industry standard 5/16”-24 THDS stud mount uses a
permanent 3/4” hole.
Pre-Installation Tips
• Resonancemaybeobtainedwiththeuseofasinglegroundelementassmall
as19”longand1/2”wide.Toimproveperformance,maketheground
planelarger.
• Forthebestperformance,mountantennaonvehiclerooftop.Themobile
antennamayalsobemountedontherearfenderortrunklid.
• Seecuttingcharttocutwhipthecorrectlengthforoperatingfrequency.
To Attach Mount to Vehicle:
Soldered Connection
1.Trimcoaxbraid.Twistcenterconductor.Applysolderfluxonbraidandcenter
conductor.Tincenterconductor.
2.Placecoax(braid)inlugchannel,pressdownandsolder,makingsurethereis
enoughsolderflowforconnection.
3.Removesolderingironandallowassemblytocool.
4.Bendcenterconductor90°intothecenterhole,applyfluxandsolder
connections.
5.Wipecleanandtestforcontinuityandshorts.
Shrink Tubing Connection
1.Slipheatshrinkabletubingovercoaxcable.(Fig.1)
2.Insertcableintosolderingholeusingatwistingmotionformaximum
penetration.(Fig.2)
3.Attachcenterconductortocenterstudandsolder.(Fig.3)
4.Pushheatshrinkabletubingoverholeendandasfarforwardaspossible.
RotateassemblyforevenheatdistributionwhileheatingIftubingdoesnot
shrinkevenlyintoplace,continueprocess.Finalassemblyshouldlooklike
Figure4.
Mounting Instructions
1.Useholesawtodrill3/4”(19mm)holeinvehicle.
2.Metaltometalcontactbetweenthevehicleandmountisessentialforbest
performance.Removeanyburrsontheundersideofthehole.
3.Routecoaxleadtoequipmentandslipmountthroughholeasshown.(Fig.5)
4.Insertsmallendofallenwrenchintoholeonsideofinsulatornutanduseto
tightenintoplace.Onfinalturn,makesure“O”ringgasketisinplaceand
LM Series
Mobile Antennas
PI00039,Rev.F,12/10,5190.4030
thattheinsulatornutiscenteredinmountinghole.Reversewrenchwithlong
endinholeforfinaltightening.(Fig.6)
5.Toattachantennatomount,placesuppliedrubberwasheroverantenna
mount.Screwloadingcoilbasefirmlyagainstrubberwasher.
Fig. 5
Insulator Nut
CarroofO-Ring
Fig. 6
O-Ring
Carroof
Fig.1
3/8” 3/8” 1/4”
CoaxBraid
1”
Center
conductor
insulation
Coaxsheath
Shrinktubing
Fig.2
Fig.4
Fig.3
Pulse warrants to every user of a Larsen
product that it will perform to its specified
ratings and will be free of defects in materials
and workmanship.
Pulse will repair or replace without charge
any Larsen product which fails to meet this
warranty within one year of the purchase
date. Excluded is failure due to misuse such as striking objects,
improper installation, and use beyond specifications.
Pulse will not be responsible for any incidental or consequential
damages due to failure of a Larsen product under this warranty or
any implied warranty.
Larsen®, Kulrod®andKulduckie®areregisteredtrademarksofPulseEngineering,Inc.
Kulglass®SeriesU.S.Patent#4,764,773;KGBSeriesU.S.Patent#5,099,252;#5,155,494-11/99
LARSEN - A Pulse Brand
3611 N.E. 112th Avenue
Vancouver, Washington 98682
Phone: [phone]
360-944-7551
Fax: [phone]
www.larsen-antennas.com
PI00039, Rev. G.04/19, 5190.4030

Rod Cutting Charts
Measuring the Rod Length - UHF Antennas
Thedimensionsshownonthecuttingchartarefor
sectionsofrodbelowthephasingcoil.Therodabove
thiscoilcomespresetfromthefactory.Donotcut
thisupperrod.Therodlengthindicatedonthechart
referstothelengthoftherodfromthebottomof
thephasingcoiltotheendoftherod.Besuretobe
preciseforbestresults.
Cutting the Rod
Thewhipisconstructedofthehighestgrade
17-7PHstainlesssteel,toprovideall-weather
protectionandmaximumradiationefficiency.Use
sharpcorneroffileoredgeofgrindingwheelto
cuttherod.Usefiletoscoretherodandsnapoff
withapairofpliers.
Cleaning the Rod
Tocleantheopencoilantennarod,useadampspongeandsoap.
800 MHz Band
Larsen®LM800antennasarecuttoberesonantat806-866MHz,
825at825-896MHzand900at890-960MHz.Nofurthercuttingisnecessary
Shock Spring Option
SomecuttingchartsapplytoLMantennasdesigned
forashockspring.Thoseantennascomewitha
metalconethatscrewseitherdirectlyonthebase
orontheshockspring(seeadjacentdrawing).The
cuttinglengthsarebasedoninsertingtherodasfar
aspossibleintothespringofbaseloadingcoil.This
givestheuserapproximately3/4”ofadjustmentin
casetherodwasinadvertentlycuttooshort.
Upper Rod
Do NOT Cut
Phasing Coil
Measure
to end of
rod and cut
per chart
DO NOT CUT
ROD ABOVE COIL!
Measurecorrectlength
perchartandcutbottom
endofrod
Cone
 Shock
 Spring
 Antenna
 base
LM QUARTER WAVE
OPER. FREQ. ROD LENGTH
(INCHES) (CM.)
Q
136 MHz 20-3/4 52.7
138 MHz 20-1/2 52.1
140 MHz 20-1/4 51.4
142 MHz 20 50.8
144 MHz 19-3/4 50.2
146 MHz 19-7/16 49.4
148 MHz 19-3/16 48.7
150 MHz 19 48.3
152 MHz 18-11/16 47.5
154 MHz 18-1/2 47.0
156 MHz 18-1/4 46.4
158 MHz 18 45.7
160 MHz 17-13/16 45.2
162 MHz 17-9/16 44.6
164 MHz 17-5/16 44.0
166 MHz 17-1/8 43.5
168 MHz 16-7/8 42.9
172 MHz 16-7/16 41.8
220 MHz 12-1/2 31.8
225 MHz 12-3/8 31.4
225 MHz 12-3/16 31.0
400 MHz 6-15/16 17.6
410 MHz 6-13/16 17.3
420 MHz 6-5/8 16.8
430 MHz 6-7/16 16.4
440 MHz 6-5/16 16.0
450 MHz 6-3/16 15.7
460 MHz 6 15.2
470 MHz 5-7/8 14.9
480 MHz 5-3/4 14.6
490 MHz 5-5/8 14.3
500 MHz 5-9/6 16.5
510 MHz 5-7/16 13.8
LM VHF BAND
OPER. FREQ. W/O SPRING W/SPRING
(INCHES) (CM.) (INCHES) (CM.)
lm150c / lm150B
144 MHz 49 124.5 46-7/8 119.1
146 MHz 48-1/4 122.6 45-3/4 116.2
148 MHz 47-3/4 121.3 45 114.3
150 MHz 46-7/8 119.1 44 111.8
152 MHz 46-1/4 117.5 43-1/4 109.9
154 MHz 45-3/8 115.3 42-3/8 107.6
156 MHz 44-5/8 113.4 41-5/8 105.7
158 MHz 43-7/8 111.4 40-3/4 103.5
160 MHz 43-1/8 109.5 40 101.6
162 MHz 42-1/4 107.3 39-1/4 97.7
164 MHz 41-5/8 105.7 38-5/8 98.1
166 MHz 41-1/8 104.5 37-7/8 96.2
168 MHz 40-3/8 102.6 37-1/8 94.3
170 MHz 39-3/4 101.0 36-3/4 93.4
172 MHz 39-1/4 99.7 36-1/8 91.8
174 MHz 38-5/8 98.1 35-5/8 90.5
LLM UHF BAND
OPER. FREQ. W/O SPRING W/SPRING
(INCHES) (CM.) (INCHES) (CM.)
lm406c
405 MHz 11-7/8 30.2 10-1/2 26.7
410 MHz 11-5/16 28.7 9-7/8 25.1
415 MHz 10-1/2 26.7 9-1/16 23.0
420 MHz 10-1/4 26.0 8-3/4 22.2
lm420c
420 MHz 12-1/6 30.6 10-1/2 26.7
425 MHz 11-5/8 29.5 10-1/8 25.7
430 MHz 11 27.9 9-3/4 24.8
435 MHz 10-9/16 26.8 9-1/4 23.5
440 MHz 10-1/8 25.7 8-3/4 22.2
lm440c
440 MHz 11-1/4 28.6 9-3/4 24.8
445 MHz 10-3/4 27.3 9-7/16 24.0
450 MHz 10-3/8 26.4 9 22.9
455 MHz 9-3/4 24.8 8-1/4 21.0
460 MHz 9-5/8 24.5 8 20.3
lm450c
450 MHz 11 27.9 9-7/16 24.0
455 MHz 10-3/8 26.4 8-3/4 22.2
460 MHz 10-1/8 25.7 8-5/8 21.9
465 MHz 9-13/16 24.9 8-1/2 21.6
470 MHz 9-3/8 23.8 8-1/16 20.5
lm470c
470 MHz 10-1/16 25.6 8-5/8 21.9
475 MHz 9-5/8 24.5 7-7/78 18.0
480 MHz 9-1/4 23.5 7-3/4 19.7
485 MHz 9 22.9 7-5/8 19.4
490 MHz 8-5/8 21.9 7-1/2 19.1
lm490c
490 MHz 9-5/8 24.5 8-1/8 20.6
495 MHz 9-1/8 23.2 7-1/2 19.1
500 MHz 8-7/8 22.5 7-1/4 18.4
505 MHz 8-9/16 21.8 7 17.8
512 MHz 8-1/8 20.6 6-5/8 16.8
TLP SERIES
1. Installthetwo#10setscrewswiththeallenwrench.Setscrewsandallen
wrencharesupplied.
2. Ifantennacoaxcableandmountmust
beinstalled,besuretoroutethecable
asshown.
3. OnnewercarstheTLPwillneedtobe
mountedalongthesideofthetrunk
lidorhood.OnoldermodelstheTLP
maybemountedonthelipofthe
trunklidnearesttherearwindowof
the auto. Tighten the set screws
sufficiently to break through the
paint and establish a good ground connection.
4. Routecoaxcablefromthetrunkareatotheradio.Installtheconnector.
Connectantennacabletoradio.
5. Install antenna on TLP mount.
Antenna Mount
Set Screws (2) Coaxial Cable