Eagle 101 User manual

sound endsat the bottom. But
anechoisalsoreturnedfrom
anyobject
betweenthe trans-
ducer and thebottom.
Asyoumove awayfromshoreon
adeep lake, thebottomsignal
will gradually move around the
dial untilitreacheszero. Ifthe
dialiscalibrated toadepth of
100 feet, thewater is100 feet
deep. Continuefurther, and the
bottomsignal willstart around
again.
Addwhatever figure it
showsto 100toget the correct
depth. Other Eagle modelshave
dualrangesthatallow youto
change toadeeperscalewhen
you godeeperthan 100feet.
SIGNAL INTERPRETATION
BecauseyourEagle isboth ex-
tremely sensitiveand powerful,
itcangive you anaccurate pic-
ture ofthekind ofbottom over
whichyour boat is passing. A
bottomoffirm sand,gravel,
shell, orhardclayreturnsa
bright,
fairly wide signal.If you
aretraveling oversuchabottom
andthesignal weakens,
it
means that
youhave moved over
asoft mud bottom. Asoftbottom
absorbs thesoundwavesandre-
turns a weaksignal. Inthis case,
simply turn upthe sensitivityto
get agood bottomreading.
A level bottomwith scattered
rocksreturnstheusualbottom
signal — plussecondary signals
both aboveandbelowit.This is
caused bythe differentdistances
the soundwaves travel. Those
thatgostraightdown, hita rock,
andcome back indicate,cor-
rectly,
thatthe topoftherock is
above thelevelofthe bottom.
Butthe soundwavesthat hita
rock toward the outer edgeofthe
cone ofsound wavesand are re-
flected back tothe transducer
travel further. Consequently,
theirsignals appear below the
bottomsignal.
Asmoothbottomofsolid rock
returnsawide, brightsignal.
Broken rock ofvarious sizes
sends back an even widerone,
with occasional flashesabove
andbelowthelevelofthetrue
bottom,though these signa]s
aren'tso distinct asthe onesre-
turnedby scattered rocks ona
smoothbottom.
Bigrocksorstumps ona smooth
bottomsendback signals above
the level ofa smooth
bottom,the
distance dependingontheir
height. If youwatch as youap-
proach a postor atree, however,
you will often see the signal
climbup, thendescendthe other
side asyoucontinue.
Asteep slope returnsa wide sig-
nal,the steeper the wider, with
the signal returnedfrom ahigh
underwater cliii
beingthe
widest.The sureproofofa
drop-off
is thesuddenchangeof
theregulardepth signal to a
wideone,then back.tothe usual
width, but eithermoreshallow
ordeeper as theboat moves
past.
Brush will returnflashesof
varying heights abovethebot-
tom signal. Weeds alsotiein
with thebottom,although they
returnweaker
signalsthan
brushortree limbs.Inmost
lakes, weedsdon't grow inwater
more than 12or15 feetdeepbe-
cause ofthe lackofsunlight.
Weeds makeagreatmany thin,
palesignals on thedial.
The nicestbottoms
to surveywith your
EAGLE are those that
return a clear, bright
signal, with no spikes
eitheraboveor below
itfrom scattered rocks.
This isthe easiest bot-
tom signal ofallto
read andfish atany
depthabove itshowup
plainly on the dial.
Nothing
is more
gratifying than to find
a bigschoolof
largemouth bassover
clean gravel orwall-
eyesover a smooth
sandbar
— places that
these two popular fish
like andthat areeasy
to fish bythebottom-
bumpingtechnique.
Itis easyto get mul-
tiple signals onthe
dialfrombottoms of
thistype. If
youare
overwater20 feet
deep, forexample, and
turnupthegainyou'll
getsignals at20and
40feet.
9 10
DETECTING
A SMOOTHBOTTOM
0
I Gravelor Hard Ciay
Ag.14
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The sensitivity con-
trolon yourEAGLE
mightbe compared
to
the volumeon aradio.
'ibm thesensitivity
knobto the rightand
youincrease the re-
ceiversensitivity; turn
itto theleftandyou
reduceit. Thisfeature
isprovidedso thatyou
can useyourEAGLE
overboth deep and
shallowwaterandyou
should alwaysadjust
thegain so that a
brightbottomsignal
showsonthe dial, re-
gardless ofdepth. If
youfail todoso and
have only a faintbot-
tom signal thedial
will fail toshowfish
inthewaterbetween
the transducer andthe
bottom.This condition
isshowninthe draw-
ingabove — thefish
aretherebut they
aren'tshownonthe
dial becausethe gain
is set too low.
constantspeedbehind the dial
on adiscdriven
byan accurately
governed motor. The bulb is
lighted everytimethe transmit-
terfires.Thisprovides
avisual
reference
pointonthe dial which
is usedasastartingpoint to
measuredepth, andas anindi-
catorthat thedepth sounderis
on. Even though the neonbulb
flashes,ithappens so.often that
thehuman
eye seesitasa
nearly
constantlight.
Thebulb also flashes at the
point onthedial thatindicates
the depth. Fhepoint isindicated
bythelength oftime ittakesthe
sound wavestoreachthe bottom
andreturn.In addition,echoes
ieturned
fromanyobject
in the
vaterbetweenthesurface and
bottomfire thebulb, too. Since
these echoes are alsotimed, they
show
the exactdepthofanyfish
— oranynumberoffish — in
thewater. Andbecausethe
soundWaves from thetransducer
godown into the waterin a nar-
row cone angle, they tell,within
amatterofafewfeet,thefish's
locationas well asthe depth.
Atadepth of10 feet,thecone
coversacircle that isapproxi-
mately onefootindiameter; at
15feetitistwofeetwide, at20
feet,threefeetwide, thecone
diameterisfourfeetwide. Re-
gardlessofdepth, thecone of
WEAK SIGNAL
INDICATES GAIN
TOO LOW
Fig. 12
Fish, 17 ft.
Depth, 35 ft.
Fig. 15
ii S
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ingto insure that theyseeall
the underwater detail as wellas
fish.
Depths greaterthan 100feet can
alsobemeasured onthe Eagle.
Forinstance,as thewaterdepth
goesfrom 90feetto110 feet,you
will seethebottomsignal onthe
dialmovepastthe"zero" signal
tothe 10-foot
marlconthe outer
scale.Thus,onthesecond revo-
lution, depths of100 to200 feet
maybe read by adding100 feet
tothereadingonthedial.
Ifindoubt asto depth,turnunit
offuntilscan discstops. Thrn
unitbackonand watchtoseeif
bottomsignalcompletes onerev-
olutionbefore stopping. Ifit
does,youare atthe depthshown
plus100 feet. Ifthe signal
travels around thedial two
times,youwill be atthe depth
shownplus 200 feet.
HOW TO USEYOUR
EAGLE DEPTH
SOUNDER
'rhe word "Sonar" is anabbrevi-
ationofSound,Navigation, and
Ranging. Itwas developed dur-
ingWorld War II asameans of
trackingenemysubmarines.
Soundtravelsatapproximately
4,800feetpersecond
through
water ascompared to approxi-
mately 1,100 feetper second
through air.
transmitted
into the water.
Whenthis wavestrikesanob-
ject, itrebounds. Sincethespeed
ofsoundthrough
wateris
known,the time lapse between
thetransmitted
signal and the
receivedechocan be measured
andthedistance tothe object
determined.
The Eagle depth soundertrans-
mitsahighfrequencysound
wave (which
isinaudible tofish
as well ashumans) through the
water. Atthe same time, ahigh
intensity neon bulb whirls ata
Some
fish,including
bass, catfish, walleyes,
andcrappies,occa-
sionallylie righton
the bottom.Even here
theEAGLEwill show
them asyoupass over,
provided
thebottomis
smoothsand,shell, or
gravel. Signalswill
appear on the dial
both above andbelow
theclearbottomsig-
nal, justthesame as
over arockybottom.
The reason forthis
isthatthesignal re-
turning from afish
near thecenterofthe
coneofsounddoesn't
travel so farasthe
signalthathits afish
near the outer edge of
thecone. Con-
sequently,the signal
from thefish in the
middle showsabove
thebottom whilethe
signalfromthefish
near the edgeshows
below thebottom.
HARDCLAY, SAND, GRAVEL,
SHELLBOTTOMS
PRINCIPLE OF SONAR
)flfl)flflflflflflfl)flfl
((((((((N
SIGNAL SENT BY LOCATOR BOUNCES BACK 'FRoM
TARGET. TIME LAPSE INDICATES DISTANCE TO TARGET
Fig. 11
4.
Sandbottom
Fig. 16
7 12
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Whenyou are hunt-
ingfish, with thegain
adjustedproperlyto
returnaclear, bright
signalfrom a bottom
ofgravel, sand, or
shell, youwill some-
timessee the signal
disappear.This doesn't
meanthatyouhave
suddenly come to ex-
tremelydeep water —
thedialwouldhave
shownthedrop-off
with awide band of
signals in thiscase.
Instead, yourboat is
now aboveamud bot-
tom. Mud absorbsthe
sound waves. Thrn up
the gain. The bottom
signalmay befaint
from abottom ofde-
caying vegetation
underdeep waterFish
will still showon the
dial, however. Back
over a hard bottom,
you'llgetmultiple
signals.
themountingholes atthetop
oftheslotsinthebracket.
6. Mounttheassemblytothe
transom
withtwo #10 screws.
Align the faceofthetrans-
ducer withthebottomofthe
hull with astraightedge.
Tighten allscrews.
7. Route thetransducercableto
the depth sounderunit. Do
notcutthe transducer cable.
Ifitistoo long, coil andstore
theexcessin an out-of-the-
waylocation.
8. Make atest run to determine
the results. Someboathulls
require loweringtheback
edge ofthetransducer 2° to
6°. If
therunwas satisfactory,
drilltwomore holesinthe
bottomoftheslots andinstall
two more #10 screws.Note:
Thetransducermust be
againstthe transom for good
results. After lockingin place,
fillanyvoids betweenthe
transomandthetransducer
with caulking compound,
epoxy, orsiliconeadhesive.
OPERATION
SENSITIVITY AND
"ON-OFF" KNOB
This knoboperates inamanner
similar tothevolumecontrol on
aradio. timing the knob
clockwise will turntheuniton,
andturningtheknob back the
full counterclockwise
position
willturntheunit off. timing
the knobin acontinued
clockwise mannerwill increase
the receiversensitivity and
weaker echosfromdeeperwater
can andwillbeobservedon the
dial.After mounting thetrans-
ducer, turnthe unitonbyturn-
ingthesensitivity knob
clockwise. You will seethe con-
stant surface signalatzero.Be-
fore long,youwill seeanother
signal — attenfeetifthe water
istenfeetdeep.This signalindi-
catesthe bottom.It, too,should
always
show.
Continueturningthe Sensitivity
control towardthe right andyou
will see a secondbottomsignal
atdoublethe depth ofthe first,
or20feet.The sound waveshave
hitbottom,bouncedback, hitthe
surface ofthewater, then
bounceddownand up again.
Overa firm bottomyou can in-
creasethesensitivity
untilthe
dial showsthreeor fourbottom
signals at multiples oftrue
depth.
The sensitivity isadjustable and
you should always set ittore-
turnasteady
bottomsignal —
nearly as brightas the zerosig-
nal — regardless
ofdepth. 'lUrn
the knobcounterclockwise
when
youbegin togetthe doublebot-
tom signal;clockwise when the
bottomsignal beginstofade. lb
show fish thesensitivity
control
shouldbe settoshow astrong,
bright bottomsignal. Many
fishermenprefer to runthe sen-
sitivity controlvery highwith
thesecond
bottomsignalshow-
MUD BOTTOMCAUSES THESIGNALTO FADE
Mud anddecayed vegetation
FIg. 17
13 6
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Fig.7
6. Use agood quality two-part
epoxy
tobond thetransducer
tothehull. Do notuse
siliconerubber sealer or any
adhesivethatdoesnotget
rock hard. Follow the instruc-
tionsonthe epoxypackage
andmix itthoroughly.
Apply
asmall amount on theentire
faceofthetransducer and
pour1/16"thicklevelintothe
areacontainedbytheclay
dam. Place thetransducer
into theepoxybypushingand
turningtoforce all ofthe air
bubbles outfromunder the
transducerface.The trans-
ducer faceshouldbeparallel
withtheboathull, witha
minimum amount ofepoxy
betweenhull andtransducet
Weightthetransducer down
untiltheepoxy cures.
7. Route the transducer cable
along gunwalesandaway
from powercables.
TRANSOM MOUNT
1. Loosely attachthebrackets to
thetransducer
with the
hardware provided.
2. Locatethebracketwherethe
flowofwaterissmoothest
withminimum turbulence
andbubbles. Also, thebracket
ortransducer shouldnotin-
terfere with theboat trailer
orhaulingoftheboat.
3. 'T'pically, the transducer
shouldbelocatedhalfrwaybe-
tween the center ofthe
transom andthe outsideedge
ofthehull. (See Figure 8.)
The transducer shouldbe
mountedawayfromstakes,
ribs, orotherhullfittings
thatcan cause turbulence.
4. Ifthe hull deadriseexceeds 4
degrees,a shoot-thru-hull
mount onthe centerline of
thehull oran optionaltrans-
ducer shouldbeused. (See
Figure9.)
5. Placethebracket
againstthe
transominthe selectedarea
with the bottomofthetraps-
ducer flushwith thebottomof
thehull.Alignthetransducer
withthebottomoftheboat
hullbyusing
a straightedge.
Markthetransom fordrilling
Your EAGLEtrans-
latestimeinto dis-
tance — thefarther
thesound waves go,
the longer ittakes
themtoreturn tothe
transducerandthe
greaterthe depth
shownon the dial.
Nowhereisthisshown
more clearly than
whenyourboat passes
over asteep, rocky
underwater
ledge or
cliff,either vertical or
inclined atasteepangle.
Assume the top of
the cliffis15 feetbe-
neaththesurface of
the water, and thebot-
tom is 50feetdeep.
Soundwaves will hit
roughspots onthe cliff
alltheway down. As
theresult, the signals
onthedial will cover
anarea extending
from 15 to50 feet — a
conditionthat could
easily
lead to confu-
sion untilyouunder-
stand it.
5 14
SIGNALS FROMSTEEP, ROCKYLEDGES
Fig. 9
k DEAD
\ RISE100
Fig. 18
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WIDTHOFSIGNAL
INDICATESSIZE OFFISH fiberglassandgel coat are faceofthetransducerandthe
Small minnowsor
bait fishappear on the
jlial as thin pale lines.
If
they aretightly
schooled theymay
covera depth of from
fiveto tenfeeton the
dial with a fewpale
lines for individual
minnowsatthe bottom
oftheschool. Your
EAGLE will indicate
even asingle minnow
30 feetbeneath the
surface ofthe water.
Obviously, the back
ofa bigfishoffers a
largersurface to re-
flect thesignal than
the back ofa small
fish. Consequently, you
getawider and
brightersignal onthe
dialand, eventhough
youcan'ttell theexact
sizeofthefishfrom
thesignal, itdoesgive
youagood clue so that
youcan instantly tell
big onesfrom little
ones.
15
Fig.19
exposed. The transducer can
then beepoxied directly to
this outer layer. (See Figure
5.)When epoxy is
pouredinto
thehole and thetransducer
placedinto the epoxy, the hull
isstill structurally rigid and
noweak points aremade.
2. The chosenareashould be in
theaft one-thirdofthehull
onplaningboats, andforward
oftheengines and/orwater
intakesindisplacementhulls.
Watershouldflowsmoothly
inthjsarea and itshouldstay
inthewateratallspeeds.
3. Before permanently bonding
the tratisducer to the hull,
trial runsarerecommended
to findthe bestmountinglo-
cation.Once an areahasbeen
determinedtobe agood spot
for the transducer tobe
mounted,addsome waterto
the area,andplacethetrans-
ducer initfacedown. This
will eliminate airbetweenthe
4
hull. Plugthetransducer into
the unit andturnthedepth
sounderon. Operatetheboat
atallspeedsand move the
transducer untilthebestloca-
tion isfoundformaximum
signal receptionand
minimum cavitation noise
(cavitation
is causedby water
turbulence andshowsupas
narrow signals all aroundthe
sonar
dial.)
4. Ifthe chosenarea is void of
potential problems,sand the
surface ofthehullandthe
faceofthe transducer with
100grit sandpaper.
The sur-
facemustbeflatenough
so
thattheentiretransducer
faceis incontact withthe
hull prior to bonding.
5. Build asmalldam outof
caulking compound ormodel-
ing clayaround thechosen
areaofthetransducer. (Do
notusePLAY-DOH.)
(See
Figure
7.)
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transducer cableneedstobeex-
tendedlonger than 10 feet,the
depth sounderandtransducer
will need tobe returned tothe
factory forre-alignment.
Fig. 2
XD-2
'IWoother transducers are avail-
ableforyour EAGLE depth
sounder. Model XD-2isa high
speedplastic unitthatcan be
transom mountedorcanshoot-
thru-hull. Itworkswell on deep
vee hulls andaluminum boats.
Theothertransducer (Model
XD-3)isfortrolling motor
mountingorshoot-thru-hull.
Fig, 3
XD-3 Ii
Aspecial bracket is availablefor
theXD-2 transducer thatwill
put itbelowthe severecavita-
tion layerthat is sometimes
present onaluminum boats. The
model number forthisbracket is
XMB-2.
1. Mounting
inside thehull is
recommended forfiberglass
hulls in an area that doesnot
have airbubblesintheresin
orseparated fiberglasslayers.
The sonarsignal must pass
through solidfiberglass.
A
successful transducer installa-
tioncan bemadeon hulls
thathave flotation materials
(suchas wood or foam) inbe-
tween layers offiberglassif
thematerial is removedfrom
thechosen
area.For example,
some manufacturers use a
layeroffiberglass,
then a core
ofbalsawood, andthenthe.
outerlayeroffiberglass.By
removingtheinnerlayerof
fiberglassandthebalsawood
core, the outer layer of
SIGNALS RETURNEDBY A ROCKYBOTTOM
Fig. 20
'Pliesignals returned
from arockybottom
are quite confusing
whenyoufirstsee
them. The EAGLE's
dialwill indicate the
level ofthe bottomat
thecorrectdepth, but
itwillalsoshow clear,
thinsignals above and
below the widermain
bottomsignal. This is
explainedby thefact
that the rocksnearthe
outer edge ofthecone
ofsound wavesare
fartherfrom the
transducerthan those
inthe center,
while
the tops ofthe latter
are closerthanthe
bottom.
This drawing also
shows the typical sig-
nalsindicating a
school ofwhite bassor
bluegillsata depth of
twenty feet.The sig-
nalsarebrighterthan
those returned
bybait
fish.
Fig. 4
XMB-2
SILENT IDi
SHOOTINGTHROUGH THE
HULL
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TREES INTHEWATER
Thesignals onthe
dial shownhere indi-
cateanunderwater
tree with afew fish
aboveit.The wateris
50feetdeep,the tree
20feettall,andthe
fish arebetweenten
and13 feetdeep.
Limbsatvarious
depthsreturnindi-
vidual signalsandac-
countforthe wide
band ofsignals on the
dial.Brushappears
similar, though notso
tall.
Bass andpanfish
often hang around
submerged vegetation,
notonly nearthesur-
facebut down to
depths of25or30 feet,
dependingon the
thermocline Todetect
them,anchorbowand
sternso yourboat
can'tmove. Constant
signals indicate tree
limbs. Signalsthat
come andgo or shift
upanddown are fish
— limbs don't move.
IMPORTANT
When installing thepowercable,
makecertainthatthein-line
fuse supplied with theunitisat-
tached tothe red conductorof
the powercable asclose tothe
power sourceas possible. This
willprotect boththe unitand
thepowercableincase either is
evershorted.Aconnectoris
supplied
to attachthe fusetothe
powercable.
The positiveconductorinthe
powercable isthe red conductor.
The unit isprotectedfrom acci-
dental polarity reversals andno
damagewill resultif
battery
connectionsare wrong.However,
the unitwill not work.
MOUNTING
The depth soundercanbe in-
stalled inanyconvenient loca-
tion whichhasaflatsurface.
The adjustableyokepermits
mountingon eitherabottom or
overheadsupportingsurface. If
the unitistobe locatedinthe
vicinity ofacompass, runitin
positiontemporarily to make
sureitdoesnot affect
compass
readings. If compass heading
changes,choose analternatelo-
cation.Note:theunitmustbe
running
whenyoumake this
test. Holesinthe baseofthe
bracket allowwood screworbolt
mounting.
Thread bothknobs partially
into
the mounting bushings onthe
case.The gimbalbracket has
slotsinthetopof itthatallows
theunitto"snap"inwithout
removingthegimbalknobs.
These slotswill clear the threads
ofthegimbalknobs,but notthe
mountingbushing onthecase.
2
The bracket sideswill haveto be
spread slighltytoclear thegim-
bal bushings, butwill return to
theiroriginal positionwhen re-
leased.Holesinthegimbal
bracket
alignwith thegimbal
bushings onthecase andwill
not allowtheunittocome off
even inseverewaveconditions.
Thremovetheunit,simply
loosenthegimbal
knobs, spread
thebracketsidesawayfromthe
case,and pull theunitup and
outofthe bracket.
TRANSDUCER
INSTALLATION
IWo differentmountingmethods
areavailable toinstallyour
EAGLE transducer,either
transom mount orshoot-thru-
hull. Althoughthe transom
mount will workonmost hulls,
werecommendthat theshoot-
thru-hullmethodbeusedonly
on solid fiberglasshulls. The
transducer signals will penetrate
single thicknessesoffiberglass,
but will notgothroughporous
materials suchas woodorfoam.
The signals also willnot pass
through
airpockets orvoidsin
thefiberglasslaminations. Re-
gardless ofwhichmounting
methodis used,theinstallation
shouldbemadein anarea that
has minimumwater turbulence,
airbubbles,andwherethe water
isthesmoothest.
The transducer cable shouldbe
routed
awayfromother electri-
calwiring. Donotcutthetrans-
ducer cable ifitistoolong.In-
stead, coil itandstorethe excess
inanunobtrusivearea.IIans-
ducer extensioncablesModel
TEC-lO are availablethatwill
extend thecable10 feet.If
the
Fig. 21
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Thank
youforselectingawater-
proofEAGLE
depth sounder. We
believethatitisthefinest unit
availabletoday, manufactured
right here inthe U.S.A. to preci-
sion tolerances.
'Tb fullyenjoytheadvantages
thisequipment brings toyou, we
suggestthatyou read thisman-
ual thoroughlybefore anyat-
tempt at installation oruse of
thisproduct.
Please filloutthewarranty card
andmail ittoEAGLE ELEC-
TRONICS. This will register
your1 year FULLwarranty
Wesuggest thatyoukeepthe
original cartonthatthe EAGLE
was shippedin,so that ifitever
needs tobereturned tothe fac-
toryforrepairs, a suitablecon-
tainerwill be available.
Powerfor the depth sounderis
suppliedby theboats12-volt DC
electricalsystem. Power maybe
pickedup at anaccessory or
powerbuss, but if you have prob-
lems withelectrical interference,
whichisindicatedby extraneous
flashes on the dial,itcan he
minimized
by connecting power
directly to thebattery(See
Figure 1.)
Ifa longer powercable is re-
quired, use ordinary #18lamp
cable available at any hardware
orelectrical supplystore.Splices
shouldbesoldered.Ifthiscan't
bedone, use crimp-type splices.
Simpletwisting
ofsplices may
resultin intermittent
power
connectionswhichcan cause in-
terference.Thpe allsplices with
electrical tape.
FISH SIGNALS
Here aresomethings thatwill
help you understand thesignals
thataredisplayedon your
Eagle: Abigfish returnsawide
signal while asmall fishreturns
a narrow one. Aschool ofbait
fishorminnows,nearly always
nearthe surface,returns a great
many thin, rapid signals. Wide
signals beneath indicatethe
gamefishwhich areoftenpres-
entundertheschool oflittlefel-
lowsto feed on them.
If
you arecruising atthreemiles
perhourwhile hunting
fishwith
yourEagle, asinglefish30feet
deepwill return asignal for ap-
proximatelyone second. (Three
milesperhouris4.4feetper
second andthe diameterofthe
circlecovered bythetransducer
is approximatelyfourfeet at
thatdepth.)The signal returned
byafishl54eetdeepwould last
halfa second, and from afish 60
feet
deep the signal would last
approximatelytwo seconds.
This is agood pointto remember
becausefishoften school in a
horizontal plane,sometimes
rather widelyscattered inthat
exact level,but notall vertically,
andasignal thatlastslonger
has tobemadebymore than one
fish. Ofcourse,fish suspended
at
differentlevels,evenif
only a
few inches higher orlowerinthe
water, will returndifferentsig-
nalsatthe correspondingdepths
on the dial.
Remember, many kindsofgame
fishlikesharpdrop-offs, rocky
ledges,and underwater cliffs.
But, asyourboat moves across
these spots, the Eaglewill be
unableto show thefish because
the sloping bottomsends back
such a wide signal.
Manykinds offish remain sus-
pendedbetweenthewatersur-
faceandbottom during hot
weather.Crappieswill usually
lie atauniformdepth similar to
ahorizontalblanketinthe
water.
Abigschool mayextend 100 feet
ineach direction andasyou pass
over ityou will get analmost
constantsignal, plusotherflash-
ingafew inches above andbe-
low A school ofwhite bass isn't
likely to cover suchabigarea as
a school of
crappie sometimes -
does,especiallyinthesummer
andfall. Thesignals will show
these fish occupying a greater
spread vertically (8 to 10 feet).
The largergamefishsuch as
bass andwalleyearen'tlikely to
beso tightlygrouped aswhite
bass, crappie,orotherpanfish,
and theindividual members,
being larger, returnstronger
signals.
1 18
INTRODUCTION POWER CONNECTIONS
SPECIFICATIONS
Dimensionswith knobsand gimbals . TBx8"Wx 6"D
Dial 0-100feet
Voltage 12voltsD.C. (operates
volts) 10-15
CurrentDrain 250ma., oneecho
PulseWidth 200-1000 j.ts, adjustable
Output Power 200wattspeak to peak
(typical)
25watts RMS
4 AMP FUSE
Fig. 1
To
12 Volts DC
(Positive)
Ground
(Negative)
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HOW TO OBTAINSERVICE
• SCHEMATIC DIAGRAM &PARTSLIST
Shouldyoudesire aschematic and parts list for your EAGLE
depth
sounder,send $1.00 to the addressabove and it will bemailed to you
promptly.Pleasebesureand
give
usthemodel
andserialnumber
of
your
EAGLE.
MODEL SILENT
101
Lithoin U.S.A.
• ADivision oL
Lowrnnrn Eleclrnrircs iii
EagleElectronicswillprovide
quickandefficientservicewithgenuine
Eaglepartsshould you
ever requireit.If
youdorequire service,call
or
writeusattheaddress
belowbeforesending intheunit.Wemaybe able
tosave
youtheinconvenienceof
sending
theUnitbackforrepairs. If
you
dohavetoreturntheunit
forservice,
pleaseenclose aletterstating
the
problemthatyou are having withtheunit.This will assistus inthe
testingandrepair
ofyourdepthsounder.
Mail to: EAGLE
ELECTRONICS
P.O. BOX 669
CATOOSA, OKLAHOMA74015
If
youliveoutofthe stateofOklahoma,call 1-800-331-2301.
If
youliveinthestateofOklahoma call collect 918-266-5373.
EAGLE
INSTALLATION INSTRUCTIONS
EAGLE ELECTRONICS
P0. BOX 669, CAT.OOSA, OKLA. 74015
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