Electra bearcat IV User manual

GENERAL
DESCRIPTION
The BearcatIV isa table and mobile model, four-band FM
monitor receiver providing automatic scanning of B channels
in all of the four Public safety/Business Bands at 30-50mHz,
146-l74m]Hz, 450-470mH2, and 4?0-5L2mHz. Its features in-
clude: Full-band coverage
in all 4 bands; B plug-in crystalsin
any combination may be used; high speedautomatic or man-
uai scanningi channel switches to omit scanningof undesired
channels;solid state l,ight Emitting Diode channel indicators;
quieting squelch control; front-mounted 3"x5" speaker; ex-
ternal speakerjack; cables
for llTV ac or l2V dc operation;
and operation from a single telescoping or outside antenna.
The most advanced
developments
in solid state circuitry
are incorporatedin this receiver;
dual-gate
MOS
ltield Effect
r-f and mixer transistorsprovide low noise and low cross-
modulation. Single
"orr""ri* into monolithic quartz crystal
i-f filters reduces spurious resPonses
and radiation and
i-p.ou", selectivity; linear inteEated circuits provide i-f
gri;, detection,",rdio amplification and output; TTL I'C'
multivibrators
and gates
prbuidrscanning
logic;
desired
chan'
nels are scanned
"*ith 't o time lost scanning
unwanted
channels."'-"4;;"clusive track-tuning
system
using
voltage-variable
ca-
pacitators
provides
high
performance
full-band
coverage.
SPECI
FICATIONS
Size:
9"W x 35/B"H x 6l/B"D
Weight:
5lbs.
cabinet: Heavy
dutyvinyl-clad
steel.Non-sliding
feet.
Power
Requirements:
ll?Vac, 15W;
l3.BVdc,
10W'
Antenna: Telescoping
antenna
(supplied). Connector
provided for outside
or mobile
antenna
Input lmpedance:
50-70
ohms.
sensitivity: H andL bands: readable
at .25microvoltfor 1 SkHzdeviation'
.6microvolt for 20 dBsignal-to-noise
ratio: U/T band
slightlyless.
Channels:Up to Bcrystal-controlled
channels
maybescanned
automatically
or
selected
individually
or in anycombination.
FrequencyRange:
Low band
30-50
mHz
(Aligned
33-4BmHz)
High
band150-1?4
mHz,
totalspread24
mIJz'
UHFband450470 mHz,
totalspread
20mHz'
UHF "T" band470'512
mHz,
totalspread
42 mHz
Scan
Rate: Approximately
25channels
persecond.
Crystals:
Miniatureplug-in
typeHC-25/U
for easyuser
installation.
Accessories
Supplied: All-band
telescoping
antenna
/ Universal
mobilemount-
ing bracket I 'itZ Vac power cablei t-g.g Vdc
_po-wel-q"!l^q--(!onnects
to
ilX"."oo."" or "Radio" iuse block. FOR USE
WITH NEGATM GROUND
SYSTEMS
ONLY).
Front Panel
Features: Squelch
control / Volumeon-off control / Combined
Manual-Scan
Channel
Select
Switch / B channel
switches
/ B Light Emitting
Dode channelindicators
/ Forward-facing
3" x 5" speaker'
Iisted by Underwriters'
Laboratories,
Inc.
Certified
under FCC Reg.
Part 15.
-2-

INSTALTATION
This receiver is shipped complete with the necessary
ac-
cessories
for mobile or table use. As a fixed receiver in areas
of fair-to-good signal strength, the telescoping whip antenna
supplied.may be usedon all bands.
If an outside antenna is necessary
for fringe reception, you
may usea l55mHz antennaon all bands,a 40mHz antenna
for
L and H bands or a 460mHz antenna on U band only. Exter-
nal antennas should be coupled to the receiver by 50 ohm
coaxial cable, such as RG-58 A/U, using the supplied auto-
motive type connector. Suitable antennas are available at
most radio dealers.
INSTRUCTIONS
The BC-4has
highnoiseimmunity because
of the noise
squelchsystem. However, the noise
generated
by the auto
electrical
systemand other parts of the car is sometimesa
problem,particularly
in areasof low signal
strength.The
sub-
ject of noiseelimination
is too lengthy
to dealwith adequate-
ly in thisinstruction
book.
It is recommendedfor thosewho wishto become
familiar
with the subject to purchase"The Radio Amateur's Hand-
book" or "The Mobile Manual" published
by the American
Radio Relayl,eagueand sold by most electronicpartsstores.
It is further recommended
that the vehiclebe taken to a ser-
vice center which specializes
in VHF-UHF two way radio
communicationsequipmentfor correction
of anoise
problem.
MOBILE INSTALLATION
This receiver may be installed in any car, truck, boat, etc.,
having
a 12 VOLT NEGATIVE GROUND SYSTEM.
[n some areas it is illegal for unauthorized persons to
receivepolice communications on a mobile receiver. The user
of this radio is responsiblefor obtaining any necessary
author-
ization through local agenciesand Electra Company cannot
he responsible
for any illegalinstallation or usage.
l. Placethe mobile mounting bracket under.the dash
to
hold the receiverin the desiredposition.
Mark and drill two holes
using
a 7164drill bit and
secure
the bracketwith the two No. 6 self-tapping
screws.
3. Insert the two plastic "T" washers, flanges turned
inward, in the desired pair of mounting holes and
securethe receiverin place with the twoIl4-20bolts
and two ll4" lD x 9l16" OD flat washers.
4. Attach the DC power cable and connect it to the
"acccssory" or "radio" terminal on the fuse block.
5. External mobile antennas may be used as described
above. The autornotive antenna may be used fully
extended for L or H bands. It should be reduced
to
approximately lB" for U bands.
OPERATION
Mth the powercableandantennaproperlyconnected,
turn the receiverON by rotating the "VO[,UME"
controlclockwise.
Place
the B channelswitchesin the up (ON) position.
Set the "MANUAL-SCAN" switch on "MANUA[,".
Adjust the "SQUELCH" control clockwiseuntil the
rushing
noiseis heard. Then adjustthe "SQUE[,CH"
control counterclockwiseuntil the rushingnoise dis-
apPears.
Press
the "MANUA[,-SCAN" switch downward and
continue to step through all channels. If the noise
should "break the squelch" on any channel,adjust
the squelch control counterclockwise
again slightly
to quiet the receiver. THIS MUST BE DONE BE-
TWEENSTATION TRANSMISSIONS.
The "MANUAL-SCAN" switch may now be used
to selectandmonitoranydesiredcl"rannel.
To sample
all channels automatically,returnthe"MAN-
UAL-SCAN" switch to "SCAN". Any channelmay
beomittedasdesiredby moving
theindividualchannel
switch downward("f0.
l.
3.
5.
6.
7.
-3-

CRYSTAT
INSTALLATION
DISCONNECT
POWERBEFORE
REMOVING
CABINET
LEAVE POWER
OFF WHILE INSTALLING CRYSTALS
To remove the cabinet, first remove the screw at the bot-
tom rear edge. Push the rear panel forward through the cab-
inet. The components and crystal socketsarein full view and
easilyaccessible.
Up to eight crystals may be installed in any combination
of L, H, or U/T bands. Each crystal is installed in the sockets
corresponding to its channel. (Channel I is nearest
the sideof
the radio)
The eight three-position slide switches select the desired
band for each crystal. To select "Lo" Band (30-50mHz) for
a particular channel, placethe corresponding switch in the "L"
position. (Nearest the front of the radio). The center or "H"
position of the switch selects
"Hi" Band (150-l74mHz) and
the third or o'U/T" position is used for both "U" (450-470
mHz) andooT"(470-5l2mHz) bands.
Remove
the
crystalbya
gentle
pull
upward.
Insert
thecry-
stal
byaligningthepinswiththe
socketsandpushing
straight
down. DO NOTBEND
THESOCKETS.
THESE\'IINIA-
TURE
SOCKETS
AREN,IADE
OFSPRING
BRONZE
AND
WILL
BREAKOFF
IFBENT
EXCESSIVELY.
NOTE: Do not install two crystals
of the same
frequency.
Rigid qualiry'
standardsareappliedto crystalsfurnished
by ElectraCompany
to assurefull performance.
thereforeour
warrantydoes
not include
correcting
pooroperationcaused
by
crystals
from othersources.
The "U/T" alignment
spreadis 450mHzto ll2mH.z, the
"H" 150mHz to l7[mHz, and the "L" 33m[z to ABmHz.
New frequencies
may be addedwithin these
spreads.
CRYSTALFORMULAS
'(L'r Received frequency + 10.80 mHz = crystal frequency
Example: 35.80 mHz + f0.80 mHz = 46.600fi) mHz
"H" - Received frequency - 10.80 mHz = crystal frequency
3
Example:
155.01mHz
- 10.80mHz
= 48.07000
3
,,UIT" Received frequency - 10.80 mHz =cr1stal frequency
I
Example:453.250
mHz
- 10.80mHz = {9.16llI mHz
9
USER HINTS
Radio equipmentusuallyoperates
in an environment
of
man-made
electro-magnetic
noisewhich radiatesfrom power
lines,fluorescent
lights,motors,appliances,
ignition systems,
etc. Modernradios are
designed
to minimize
interference
from
suchsources
but operation
may beaffected
underconditions
of unusually strong
noise.
Distant weak,".hp" or noise
signals
may bereceivedby
this receiverbecauseof its high sensitiuity. Whenever
such
conditions
interrupt scanning or whenevera
verybusy channel
prevents reception of other desired signals,the affected
channel
may be bypassed by means of its individualpanel
switch.
ln casesof strong
interferingnoiseor signals
it may be
desirableto reduce thelengthof theantennato reduce
noise
pickup below a critical level. This may be very effective
in
medium
and
strongsignal
areas.
-Single-channeloperation may be obtainedas described
under Operating
Instructions.It may also be accomplished
with the"\IANUAL-SCAN" switch in either
position
bylock-
ing out all but thedesiredchannel.Thisassuresthat theradio
will alwavsbe
on thatchannel
evenwhen
turned
OFF andON.
Continuous-carrier
signals
such asthe ESSAweatherbroad-
caslson 162.55mH2,whichareavailablein manyareas,
may
be receivedwhen desiredby use of the individualchannel
swi
tches.
In mobile servicethecommonlyencountered
poor recep-
tion conditions are signal fading, nearhy faulty ignition
systems,
power
lines
andproximity to strongsignals.
Careful
settingof thesquelch control
will minimizetheseconditions.
Shenmoringorshipping
theradio,remove
thetelescoping
antennato avoiddamage
to it or to theinternalcircuitassem-
blies.
RADIO
SERVICES
Locd Govemment Specid Emergency Police
Highway Maintenance -Hospitds Fire
Forestry-Conserration -Ambulances Press
Motion Pictures -Physicians Business
Special
Indusbial -Disaster Relief Railroad
Telephone Maintenance -School Busses Taxicab
Automotile Emergency Power Marine
Public Mobile Radio Peholeum Manufachrers
Mobile Telephones Forest Products Motor Carrier
Rural Radio
00000000
t23.1
5878
[il[[[[00
-4-

ALIGNMENT
I-F SECTION
Nignment of the I-F system consistsof optimizing the input and output networks
and balancingthe detector output. The bandpassand center frequency are established
by quartz crystal filters and "peaking" the coils can result
in bandpassripple or poor sensi-
tivity. Field alignment
shouldnot be
necessary
but theprocedure
isgiven
for generalinformation.
EOUIPMENT
NEEDED
Oscilloscope
Sweep
generatorwith 10.79,
10.80
andl0.BlmHz markers
l. Connect sweep generator to TP-l through a lpf capacitator.
2. Connect oscilloscope to TP-3.
3. Maintain output of 10.B0mHz sweep generator at a low level
to prevent distortion from overloading.
4. Detune T5 for maximum IF output display. See Figure 2.
5. Adjust T3 for maximum output, and T4 for minimum ripple.
Adjust T5 sothat 10.80mHz is in center
of discriminator
curve
and
for best linearity. See Figure3.
to.8l
Figure2 Figure3
ALTERNATE METIIOD: I-F alignment may be checked
using a Measurements
Model 800 Generator or equivalent tuned to an operating frequency and swept
+25kc. Markersare not essential
since center frequencyis determinedby the filter.
R-F SECTION
D()NC)T
ATTEMFT
ALIGNMENT
OR"PEAKNG'' OFR-F SECTTON.
The R-F alignmentpoints areadjusted
and sealedat the factory and shouldnot be
disturbed. Factory alignmentinvolves
multi-frequency
signalgenerationsystems,add-on
test modules,
output indicators
and training
beyond
the scopeof normalservice activities.
TheuniqueR-F systeminclurles
electronic
tracking
of R-F andoscillator circuitsfor
maximum
performance
overa widerange
of frequencies.
THISPERFORMANCE
CAN BE
DESTROYED
BY AN ATTEMPTTO "PEAK UP''OR "TWEAK'' OR"OPTIMIZE'" ETC.
lo.
8
-5-

c4/
.ol
R
49
470
c42
.ool
c40
1-
J-
=
R50
6.8
K
I
+tZ
O
a
.|
3
c4
.o0
{
CRYSTALS
Y-I TO Y-8
R48
|
6.8K
I
I
R4l
330
R42
22K
R56
loK R57 R53
4.7K
c
c36
.ool
vll
H
L
R52
loK
!
R55
47K
+12
+12
(c)
+12
(C) R54
47K
RESTSTOR
VALUES ft{ OHng
CAPACITOR Y LIIESBELOU I Iil
^bvE- ABovE
I lN
U1{LE33 OTIIERUI9E SPECIFIED
TFD
pl
l'4A 33o
R3 R5
33K Z.ZK
\?.,,x,,h^vvc3
ci3
I = V22 tll-3
+t2(c)
R195 RzO
27Kf 56K
D4 O *re(c)
c2
3.3
Rt6
loK
Rls ct8
33K ;.; t
331
'.'ru
"l f .'i-44 Lrot
R24
t DGT czs
Rzz loo loK f T .ol
c24 t R27
47O L 22K
f vvcs
Ln +
c32
470
R38
33K
R37 | css
loo * ro
DB
+ toK
C59 T'
.oot €
c37 rT\ *
.ool + ,1u
sw
ll-18
Ll4
BEARCAT
N SCH

+12
R65
loK c45
.oo5 R66
'oo .otuot
S
c48
.l
R76
IK
R77
loK
Ll6
c 47l
.l
Dlo
c69
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cso
0l
139
820
f
R78
?
Ll5 c5l
3.3
+
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c6l
IOOMF
6V
FLI FLz FL3
ll-l-Ilr
-E--=:-:r
+ttu
R80
toK
VOL.
c58
R,69
loK
c60
.oo33
+
l2
R7l
33
c52
.05
c49
470
cs3
.l
82
toK
c59^
+12
R84
1.5
K
Io
+I
R72
39n_
+
c62
IOOMF
c64
too
c
65
.01
c54
.l R79
47K
R8l
33K
R
tlo
3.3
K
20h
Rill
5.3K
2"h
.ol
+12 T z.zut
*
R86
to
K
R97
470
R96
22
R
to4
47K
+12
+12
SQUELCH
R87
5K
R98
47K
sw2
sw3
ilo2
t?o
RtoT
2.2M
I
I
4l
t70
R88
470
Ll7
RtoS
47
0 l/2w
R99
56
K x'93*
+12
RloS
150
l/ 2 V,l
c55 .OOI
c56
ool c57
.o47
R74
IM R75
IM
tc-
9
t35
470K I *lz
YlAT IC
T6 A.C.
PLUG D.C.
PLUG

=
IJ] F
>a
a.7
OX
F>
s)
-8-

VOTTAGECHARI
The Voltage Chart may be usedasan approximate
guidein following circuit operationor locatinga defectivestag
You shouldbe familiar with the entire manualbeforeattempting measurements.
INTEGRATED CIRCUIT VOLTAGES
TRANSISTOR
VOLTAGES
LOGICCHART
The logic sequencefor counting is shown by "0" under .5v
and "l " over4v. I.C.-6pins 8 and9 (*) change
stateon each
movement,
up or down, of the "Manual-Scan"
Switch.
IC No. I2 3 4 5 6 789
PIN 1
2
3
4
5
6
7
8
9
10
1l
t2
l3
t4
1.4
GND
r.45
GND
11.6
t2
t2
GND
x
x
x
x
x
x
1.4
GND
r.45
0
10.5
ll
10.2
0
x
x
x
x
x
x
5.6
3.4
0
1.4
t.4
1.4
GND
GND
.15
1.5
NC
3.4
t2
6.2
0
6
6
GND
NC
6
t2
NC
x
x
x
x
x
x
8
NC
GND
NC
GND
.6
0
1.3
NC
6.4
NC
t5.2
NC
15.6
NC
5.2
5
NC
.2
5.2
GND
5
.l
t.6
6
5
6
6.2
NC
5
.t
NC
.l
5
GND
5
.l
NC
5
5
NC
6.2
.1
.l
t2
.1
5
t2
GND
.2
5
5
t2
5
.l
5.2
5
5
t2
5
.t
t2
GND
t2
.l
.l
t2
.l
5
.2
Channel
No. I selected.
COI.JNT
I. C.No. PIN I2 3 4 5 678
6
5
6
8*,
9*
0000lltl
llrr0000
rlllllll
00000000
01010101
10101010
r1001100
00ll00tl
0lltllll
l0ltllll
rr0lllll
lllOtttl
llll0lll
lllll0ll
llllll0l
lllllll0
7
5
6
8
9
9
8
ll
6
3
83
6
ll
8
TESTCONDITION QNo. EBc
L(HUr)
LH/ur
NOXTAL/XTAL..
LH/UT
LUT/H
SQLJELCH,CWCCW
SQUELCH
CW/CCW
SQIJELCHCW/CCW
MAN/SCAN
MAN/SCAN
LHi{n
LUT/H
Ql
2
3
4
5
8
9
l0
ll
l2
t3
t4
t5
r6
t7
l8
l9
20
2l
22
QO
Q7
2.3
.8
GND
GND
t2.o
t2.0
3.4
.2s
lr.2
t2
lt.7
t2
GND
GND
.007/.0003
GND
014
t2
5.4
5.4
15.6
3
1.5
.7
0lo7
rt.4
rr.3lrr.6
3.8
.9
rr.9lrr.3
r2lrr.3
.41.7
.7
l.M
.081.7
0
6
t2
6
6
l5
12.0
I1.0
6.0
t2:0
r2.ol0
t2
r2lrr.8
0lt2
0l12
.7
l.M
.08/10.s
GND
6
0
.0s/4.0
t2
l5
t2
DsGt G2
11.8/0
tl GND
GND 0
04
01.7
*Tuning Voltage- varies
with crystalfrequency.
-9-

GENERAL
It is recommended that servicingof this receiverbe done
by the factory service
center. Specialequipment and skills are
maintained at the factory to give fast and efficient serviceon
all of our products.
When retuming radio receivers to the factory for service,
include crystals, ac and dc power cables and telescoping
antenna. Disconnect cables and antenna,pack carefully and
include a trrief. detailed description of the difficulty you are
having.
The receiver circuitry is designed to utilize the best
feafures of four types of semiconductors: rectifier diodes,
conventional bi-polar transistors, insulated-gate field-effect
transistorsand integrated circuits. Servicing
should not be
attempted by anyone who is not familiar with the manu-
facturer's recommendationsand cautions relating to each of
these
devices. The useof ohmmeters
is particularly hazardous
since they can deliver voltagesand currents large enough to
damagesemiconductors.
Unusual circuitry in this receiver includes the automatic
tuning system. I.C. No.1 and the associated
circuits generate
tuning voltagesto track the antenna, r-f and oscillator circuits
as channelsare scanned. Also, when the receiver is operating
in the "L" band,
loadingcoil L-l isswitched
into the telescop-
ingantenna
circuit.
Audio output power is measuredwith bursls of modula-
tion or by measuring the maxirnum excursion on voice
modulation asshorn on an oscilloscope. S'hen a continuous
tone is received.the output rrill start at full porverand then
decreaseto approximatel,v
half power to protect the output
inteEated circuit from overload. It rrill then retum to full
power for voicecommunications.
The LED indicators have a forward voltage drop of about
l.6v at 20ma. The current shouldnot exceed50ma. They are
polarized and may be damaged by a high reverse voltage.
When a channellamp doesnot light, the failuremay beeither
the lamp or the switchingI.C. If the channeln'orks,check the
lampi if not, check the I.C. [hen groupsof lamps are out.
refer to the losic chart.
TRACKEDTUNING
SYSTEM
All tuned circuits in the RF sections
are tuned by voltage-
variable capacitators which optimize the radio for eachcrystal
individually regardlessof where it falls in any band. This tun-
ing is done automatically and allows the Bearcat IV to tune
all parts of any band without compromise.
Tracked tuning is accomplished by meansof a DC voltage
applied
to YVCI . 2.3,4,5.6. This
voltage
varies
with crystal
frequencv and is higher for higher frequency crystals. It isad-
justed
br Tl. T2. Rl7 and
R52.
Facton- alignment
of the RF and trackedtuning system
in-
volves
highlv specialized
equipment and training not available
to nornral
senice activities.
Because
this unique feature is out-side
the experienceof
eren the most highlr- trained technicians.
theseadjustments
should onlv be made bv Electra.
BANDSWITCHING
SwitchesSWll-lB are used to select
the proper band for
eachchannel. Thesesn'itches,
the channelscanning
logic(IC6,
7.8.9) and hansistor
switches
QB, Qll, and Q13 generate
three l2\' bandswitch signals- U, U, and H. These
signals
select the proper RF section (VHF or UHF) and switch in-
ductors in the VHF section to select
L or H band. For any
selected
channel.the logic diagramisas
follows:
BandSelected 0=
OVDC
I = 12VDCL
H
t-/T
BA\DS\\'ITCHI\G FUNCTIONS
(Qtt) on for L/T bandonly
l. SwitchesDBon(Grounds TriplerTank)
2. Switches
QB
off
3. Switches
Q{ on (Shiftstuningvoltageupward)
{. SwitchesDl on (Shorts antenna
loadingcoil)
5. -suppliesbiasroltagesto Ql, Q2, Q3
(UHF Section)
(QB) on for [, or H band
Suppliesdrain voltageto Q6 (VHF amplifier)
(Ql3) on for H band only
l. SwitchesDB on (Grounds
Tripler Tank)
2. Supplies Gate 2 bias to Q7 (UHF \lixer)
3. SwitchesD5 andD6on(Shorts
outlow band coils
L9andLl l)
4. Switches
Q4 on (Shifts tuning voltageupward)
SERVICING
I
I
0
0
I
0
0
0
I
U
-10-

SERVICE
PARTS
LIST
Resistors,
YN lO%
33k
...........
330
............
.
. .......::::::::
2.2k..........
6.8k
..........
22k...........
3.3k
..........
1k
47k...........
l0K,Var.
8.2k
.........
27k ..........
56k ..........
10.............
68k ..........
4.7k...
15k..........
470.........
5.6k
r00..........
82
1.8k.........
270...........
33............
39.............
470k.......
1Meg.
820
10kVol.w/sw................
2.2Meg.
l.5k
82k ..........
5k Var./Squelch Contol .
22.............
150..........
2.2Meg.
470
.........
3.3k,2Vo
Capacitors
.001mf20%Disc.
Cer.
....
3.3pt
20%
Disc.
Cer........
2.2pt2O%Disc.
Cer.
.......
ISptt0%
Disc.
Cer........
33pt
20%
Disc.
Cer. .......
27ptl0%Disc.
Cer........
68pfl07o
Disc.
Cer. .......
l0pf l0% Disc.
Cer. .......
22pft0%
Disc.
Cer........
lpf ! .25VoDisc.
Cer. .....
6.8pf5%
Disc.
Cer.
100pf
l0Vo
Disc.
Cer.......
470pt
2O%Disc.
Cer.
......
.Olmf 20%50V
Disc.
Cer.
.02mf 20%50VDisc.
Cer.
82pf10%
Disc.
Cer. .......
.005mt20%Disc.
Cer.
.....
.05mf
50VDisc.
Cer. .....
.lmf GMV 10VDisc.
Cer.
.lmf l0% 33V
Mylar ......
.001mf
l0%33V Mylar...
.047mfl07o33Y Mylar...
2.2mfSolidAl. 20%6V ..
.0033mf
l0%33V
100mfLytic 15V
500mfLytic 10V
2000mfLytic 20V
rc3
IC4
L-8,
l0
L-9,ll
Semi{onductors List Price List Price
$ .2s
.25
.25
.25
.25
.25
.25
.25
.25
.75
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
t{
2.00
.25
.25
.25
1.50
.25
.25
.25
.25
.25
.50
.50
.50
.50
.50
.50
.50
.50
.50
.50
.50
.50
.50
.50
.50
.50
.50
.50
.50
.75
.75
.75
.75
.50
1.00
1.00
1.50
2N5179
traps:riq:...............::::::::
2N4t26
3N201
2N3563
MPS-3640
TIP-30
MPN-3401
1N914
1N34A
6V Zener
t.l
lN400l
BB-105A
(Matched)
.......
BB-209
(Matched)
LM-703LN
MC-I357P
'uA74l
UA7O6
sN7474
sN7426
Inductors
A-219-lLoadingCoil ....
A-218-lChoke
A-509Ctroke
4-508-1Coil
,{-508-2
Coil .........
A-2184 Choke
B-501-2Coil .........
B-5ll Coil..........
A-218-3Choke
B-501-1Coil...........
A-205
Choke
A-218-2Choke
9-502-2Coil (tracking) ..
B-502-l Coil(tracking) ..
9-217-2Coil
(I.F.)
8-507PowerTransformer
Miscellaneous
2.50
.75
.75
2.50
.75
.75
1.50
1.00
.50
.50
1.00
.50
2.00
2.OO
1.50
3.s0
3.50
5.00
2.00
1.50
1.00
.50
.50
.s0
.50
.50
.50
.50
.50
.50
.50
.50
1.50
r.50
2.00
3.50
SP-1
A-135Ctystal 5.00
A-226-l CrystalFilter 10.00
A-226-2Crystal
Filter 10.00
P.
C.Board.
L.E.D......... .75
B-254-l Man-Scan
Switch 2.00
GF-124C.
W.
Switch....... .75
A-503-l
Frame,
SW
........ 1.00
4-504-1Contact,SW...... .25
A-505-l Handle, SW
..... .25
1207AntennaConnector .75
1200
Antenna
Plug .75
3512A
Ext.Speaker
Jack 1.00
P3304AB
Power
Conn.... 1.00
S-3304-FHT-M
Socket.... 1.00
DCCordAssembly 1.50
ACCordAssembly 1.50
MobileMounting
Kit ...... 2.00
8-248-2
Speaker3x5 3.00
A-138-2
TelescopingAn-
tenna 1.50
8-228
FrontPanel
..........
$ 1.75
C-233Trim........ 3.00
C-203
WrapAssembly.... 7.50
A-237Antenna
Bushing. .75
RB-155-840
Knob .75
Replacement
partsmaybeordereddirectly from:
Electra
C.o.
- P.
O.Box 29243,- 300S.County Une Rd. - Cumberland,
Ind. 46229
Cash
orderfor partswill beshipped
prepaid.
-11-

RETURNWARRANTY
CARDWITHIN
IO
DAYS
DO
NOT
ABUSE
ORMODIFY
RADIO
NEVER
REMOVE
A SERIALNUMBER
WARRANTY
This receiver is guaranteed to be free from defects in material and workmanship.
We aEee to remedy such defect or to furnish a new part in exchange for any part which,
under normal installation, use and service,discloses
such defect, provided the receiver
is delivered to us, intact, for our examination. rrith alt transportation charges prepaid
to our factory, within one year from the date of sale to the original purchaser, and
providedsuch
examination discloses,
in our judgment, that it is thus defective.
This warranty does not apply if the receiver has been subjected to misuse, neglect,
accidents,incorrect wiring not our own;improper installation, or to use in violation of
instructions furnished by us, nor to receiversthat have been repaired or altered outside
our factory.
This warranty excludes all oral or other implied warranhes, and the manufacfurer
shall in no event be liable for damages
for a breach of warranty in an amount exceeding
the purchase
price of the alleged
defectiveequipment.
TOPT,ACE
WARRANTY
IN FORCE
FILLOUTAND
RETURN
WARRANTY
CARD
MTHrN
TEN(10)DAYS
OFPURCHASE.
ELECTRA
CO}IPANY
[)l\'1.\l(
)\ ()F'
\l \S(.() (.(iRP(
)tt
\'l'l(
)\
300East
County
LintRd..
South
Cumberland.
Indiana,16229
IM-501-l
-t2-