Page 1
R
SERUIGE
MAilUAL
01{
GALI
ATERT
RECEIVER
M(IDET
M0A.6II
*g{a
G0ilMut{lcATl0l'ls
lJlc.
1227 S.PATRICK DRIVE
SATELLITE
BEACH
FLA
Page 2
tr-
TABLE
OF
CONTENTS
SESTION 1 GENERAL
INFORMATION
1-l
Description
L-2
Specifications
1-3
Egui-pment Supplied
1-4
Equiprnent Not Supplied
With
Unit
(Accessories)
1-5
fnstal.lation
1-6
operation
L-7
Crystal Specifications
SEqTION
2
CIRCUIT
DESCRIPTION
2-L
Crysta1
Select Circuit
2-2
RF Front
End
2-3 OscilLator/Multiplier
2-4
r.F..
2-5
auaio
2-6
two-Tone
Sequential
Decoder
2-7 Larp
logic
and
Igniter Drives
2-8 Decoder Reset
SECTION 3 ALIGNMENT PROCEDT'RE
3-l
Final Test Procedure
-
TP-L4-254
3-2
Test Procedure
-
Two-Tone
Seguential Decoder
-
TP-14-2I9
3-3
Schenratic
3-4
Top
View
3-5
Bottom
View
SECTION
4 PARTS
LIST
v-
3r-
Page 3
l
TABLE OF
CONTENTS
SECTION 1
GENERAL INFORMATION
1-1
Description
L-2 Specifications
1-3
Equipment Supplied
L-4
Equipment
Not Supplied With
Unit
(Accessories)
1-5
fnstallation
1-6
Operation
L-7 Crystal Specifications
SECTION 2
CIRCUIT
DESCRIPTION
2-L
Crystal Select Circuit
2-2
RE Front
End
,.
2-3 Oscillator/Multiplier
2-4 r.F.
2-5
audio
2-6 Two-Tone
Sequential Decoder
2-7 Lanp Iogic
and
Igrniter
Drives
2-8
Decoder
Reset
SECTION 3 ALIGNI{ENT
PROCEDURE
3-1 Final Test
Procedure
-
TP-L4-254
3-2
Test
Procedure
-
Trro-Tone
Sequential
Decoder
-
Tp-14-2I9
3-3
Schernatic
3-4
Top
Vi-ew
3-5
Bottom
View
'-
_,
SECTION
4 PARTS
LTST
Page 4
SECTION
1
GENERAL
INFORI'IATION
1-1 DEScRIPTIoN
^
"'
The MCA 6L1
is
a
two
channel crlstal:controlled
Fll Receiver.
The
channel
frequencies Day
be selected
frcm
any of three
public
service
comuni.cations
bands;
Iow VHF
band
(30-50)
ltltz, Iligh
\rEF
band
(146-174)
MHz
and
UEF band
(450-512)
MHz.
fhe
bands
are
juuper
pin
selectable and the tro
charurels
need
not be in
!fus
srqe
band.
.
the
prinary
use of this receiver
is
as + tone
alert device;
it can
also
be
used
to
nonitor
uncoded traffic
on
your
alert'channel at
the
use!'s discretion.
In
the
alert
rcde the recej.ver is held in the
squelched condition
until
its
special
coded
signal is received.,
there
ire trro di.fferent tno-tone codes
that
will
activate each
recei.ver. ?he
codes are
nade up
of
three tones
A,
B and C. The
first
tone
called
A
for
eonvenience
nust
be the lead tone of
the
tno-tone
sequence, the
second
tone
can, be eitber B
or
C
but not both.
This will
allow all radios to
have
a
comon code as well
as an
individual
code.
(A,B)
can
be
a cosron code
and
individual
call
codes can
be
(A,
c),
(A,D) r (A,E)
'
(A'F),
etc.
The
nunber
of
possiSle
conbinattons of
codes
can be
greatly
increased
by
the
installation
of an
uA
301
option.
Thi.s
essentj.aLly
doubles
the
nrnber
of
tones
that
can be received
and allows
for
trrc first tones,
or
A
tones which
can be
either
the
sane
or
d,ifferent depending
on the owner's requireaents.
the MCA
611 utilizes
silicon
transistors
for reliability
as
well
as ten
integrrated
circuits.
the
tone
decoder
is a
digital
device unlike
older modelg that
used
reeds.
In add.ition,
both a c::ystal first
I.!'.
filter
and a ceramic
second
I.F.
filter
are
eryloyed.
This
provides
superi.or
perfotmance
in areas where
there
argmany
closely-
spaced channels.
In addition,
this radio featrrres both
carrier
controlled
reset and
timer
con-
trolLed
reset. Either one
or the other
nay
be used
to
reset the digital
filter
and
retur:1
the radj.o
to a squelched condition. The
timer rcilI
run fron
3O
sec to
3
mi-nutes
and the
other systen resets and
sguelches
the
radio
when
the
carrier
stops.
In
order f,or
the carrier reset to
work,
the radio nust
be
squelched
An
exteraal sPeaker
iack
a.nd
connectors
for
an AC
or
DC
igniter have
also been
included on
the back
panel.
The
user has
the option
of
ej.ther a
pulsed
or
r:npulsed
igniter
(jursper
pin
selectable).
L-2
sPEcrFrcATroNs
See
page
2
L-3
EOUIPMENT SUPPLIED
a. Receiver Unit
b. DC
Power
Cord
e.
TeJ.escopi.c Antenna
d. Carrying Handle
e. Or*nersr Instruction Manual
f.
Warranty
Card
g.
AC Power
Cord
1-4 EaUTPMENT NoT sUPPLIED wrrH
h.
Antenna
clip
i.
!{obile
l,tor:nting
Bracket
a.
Antenna Splitter
-
MA-5
b.
Battery
-
MA-181
ci
DC Igniter
-
WA-24
d.
Remote Speaker
-
MA-108
tlcA 611
-1-
UNIT
(RccEssoRIES)
SECTION
1
Page 5
I-2
sPEcTFIcATIoNS
GEIiTER;AL
Channels.
...
2
operating
temperature....
....q..
-3OoC
to 60oC
Operating duty cycle....
... I
hr 10*
alcrt
Size.
..
6
L/z"W x lO 3/4nL
x
2
5/8"8
16.5 x 27.3
x
5.7 cn
Weight.
3.12
Lb/L.42 kg
Voltage
Beq..
....
117
vac, 12-17'
\rDC.
8att.
10.8
vDC
current
drain.
...
@
13.8 vDc
Seceiver squelgh.
55bA
Receiver
nax audio
.... 145nA
Antema.
... .
50
ohn
RECEI\'ER
sensitiviry...
...
2odB.
QgrETn$G/ldB
s$IAn
Lr 30- 39
!4Hz-. .. .. .. .5
/
.4
LH 39-
50 MEa.. ......
.5
/.4
rrr
146-160 !tHz. .
-
,5
/.q
rrH 160-170
lrEz
.5
/.4
Ur"
450-470 MEz.
.55
/.qS
uH 475-500
MHz.
.
.55
/.45
Audio
sq. sensitivity
-
Ehreshold .
.3
Uv
I'EF
light.
.34Uv
trtP
\
Adjacent channel
Low Vtll' 30- 50 MEz--
.....
60
High
VIIF
145-170 !{82..
.....
65
uIrF 450-500 MEz..
..... 45
Spr:rious
rejection
(except
primary
inage)
.
sOdB
Inte:anodulation attenuation...
..
2mB
QUfETXNG,/12dB
SINAD
/43
/65
/5e
/4s
/ss
/46
MAB..
..
8.5
KHz
Freq
stab
teup. .0006t
\fHF
Freq
stab
volt. .001t
VIIF
Audj.o response ..
EIA
+2/-e
6dBloctave
de-emphasis
Audio
out
power
(nax).
.5!{
Squelch blockj.ng.
Meets
EIA
specs
Receiver attack time.
.
I50ns
(nax)
Receiver sq. closi-ng.... ...
250ns
(nax)
Hum
&
noise ratio
3gdB
unsqrrelched,
50
squelched
Undesired
condutted
(AC)
. ..
-85d8
n
(max)
Undesired
conducted
(RF)
.
..
_94d8
rn
(rnax)
Undesired
radiated.
...
FCC
Icw VIIF 3C- 50 !!H2.. . ....
55
rligh
vHF
146-170 wtz,.. .....
55
UIIF
450-500 !tHz.. .....
45
I
I
1
:d
SECTION
I
,J
31
it
MCA
611
-2-
Page 6
DECODER
Frequency
range.
:""
'
?ll"ll";i3i
5,""tabre)
Audj.o
input
irnpedance
.....
.
gneater
than
LOK
ohn
6dB
baadrddth..
Inputs
-
A0
audio
i.nput.
...._.....
.2
-
lvlus
D12
RST
i-agut
(!,tCA-611
onlyl
.. 9V
nax.
K5
lticrophone
hang-uB..
..
r.
.
.
O\,
(enable)
open
(reset)
Outputs--
DO
MSG:,:laq)
driver
(!{ICAO{O}i
2-rray
only)
30na
sink
D1t MSc
latch
Q
output
(1.!CA-6L1
only)
...
l3ua
source
K7
sq- conteol
(MrcRo{oM
2-r.qy
ody)
.. l5oa
sorgce
Sensitivity
(decoder
ryjth
ar:dio)...
..l2dB
sinad,
IOO*
detecr
6dB
sinad 75t
detect
I'
l'lcA
611
-3-
SECTION
1
Page 7
1-5 TNsTALLATToN
Mobile
12
VDC
Installation:
The
!{C,A 611
is
designed for
nobile lnstallation
in any vehicle
that has
a
12 VDC
negrative
grround
systeo.
The red lead sith
the
fuseholder
mrst
be
corurected to the
positi.ve
tsm,inal
side
of
the
battery. In tlre event
that
the battaij,
is renoteLy
located, it
nay be necegsa:ryr
to install additional
wires
or
Bick
up
+v
froa sone
other locatlon in the
vehicle's
electrical
systeq. Grorrnd Eay be
picked
uB from the
optional
rcunting hardnare but
a
hard
wj-red
ground
to the
phj.llips
head screr on the
back of tlre chassis ls
preferred.
Renove
ttre aatenna by rotating
it counter
clockrrise.
Install
an
!{A-5
antenna splitter so tlre
r\CA 611
can
share the velr:icLe|s
built-in
antenna
with
the existi.ng radio.
Mormt
the
bracket
MA-63
to any convenient
location
and screw ttre radio
into
position
with the two lsrurled. knobs-
Batterv
Xnstallation:
Reuone ttre antenna bl' rotating
it
corrnter
cloclnriser
remove the tro
knurled knobs and
puIL
tlre case
of,f.
Place
tlre coanector
end of the
battery
(MA-191)
gently
betrrreen
the spring retainers and slide
it fonsard
r:ntiJ.
it trakes
good
contact. Then attach tbe battery
retaining bracket
cn
the back of the battery and
"snug"
it forrrard untIl
the battery
is
held
firmly;
tighten
tlre
bracket
screw.
C:rzstal Installation:
The follorring
Regency Part Nurnber
c*ystals are
used:
Low
VIIF:
3C]-542
High
v-HF:
3OL-532
UHF:
301-603
Crysta1 socket
)€01
(XIL
socket
frrrthest from
speaker) corresponds
to
the
"no:laalu
position
of the front
panel
frequency
select
switch. X20Lrs
band
select
pin
is on
the
anode of
CR209. The
band is selected by
putting
the other end of
the
jwper
pin
on
one
of,
the
following
Bins,
depending
on
the
required frequency.
LL
30-
39!{Hz
LE
39- 50MHz
t{L 146-160!4IIz
HII
160-170MEz
UL 450-470trtHz
UII
475-50OMIIz
X2O2' s
jr:mper
pin
is
corurected
to the
anode of CR21O
and
cotesponds to
the
"alternate"
frequency"
After the crystals
are installed,
it
will
be
necess;rrlt
to tqne
it up
i.n accordance
with
the instructions
in the service manual.
Ignj-ter
Installation :
fvo igniter
drivers
are
provided
on
the
rnain board; a
pulsed
drive and
an
r:npulsed
drive. {he later is
already wired
to the bottom
lug of t}re
three tqminal corurector
on
the
back
panel
of
the radi.o. This nakes
the
radio immedj.ately compatible
rrith
the l,lA-24
Igniter
Option.
MCA
611
-4-
SESIION
1
Page 8
rf
you
require an oN-ogF feature
for
your
igmiter,
sinply
remove
A
"'"
the fcrale
junper
connector frmr
Q213
and
put
it
on the
collector
pin
of
Q212.
1-6
oPERATToN
Vo1une
Control:
Itris
control
varies
the audio
output level for
the
internal speaker.
It also varj.es
the level of
audio
present
at
the external
spealcer
corutection.
!{oving
the control up
iacreases the
Volrse
level.
Squelch
Co:rtrol:
The squelch only works
when the
radj.o is
in the
nonj.tor npde.
It'
elimiaates
backgror:nd noise in
the
absence
of
a
signal.. Ful1
squelch
is
al;.
the way
down.
AJ.ert Monitor
Switch:
In
the
alert
node
oaly the
proBerly
coded
sj.gnal
can open
the squelch.
In the
nonitolc
oode any
traffis, on tlre selected
frequency
can
be
monitored.
Frequencv
Srritch:
this
selects
either
Fl
or F2.
Dutv Switch:
Used only with
an MA-3O1
option, othe::vise
it is
left in
the
'rlibtmal"
position.
fhis
switch'rpuld
al1ow an appropriately
equipped
radio
to decode
either
AB and
AC or ZE and ZF.
(An
interna.l.
corurection
will
allow
the
radio
to decode
A8, AC
@
O, ZF
regardless of
the
duty sritch
position.
Alert
and
Ex. Pwr. Liqht:
Steady
light indicates
AC
Poner
ON.
No
light
indicates
radio is on battery.
Slon Elashing
-
Iow
battery.
Fast FLashing
-
a
sj.gmal has been
received.
Rear Panel:
For
convenience
of
srcbiLe
operation, we
have
included
t'.ro
+V
connectors
on the
back of
the radioi
one for
the
vehj.clers
battery
and
one
to
power
the
igniter
option
MA-24.
Ttre
bottom connector
is for
the igniter
drive.
In
addition'
tlrere
is
an
external
speaker
jack
wtrich
allows
for a
remotely
located
Epeaker, MA-108,
as
well
as
an external
antenna
jack
to
go
with
the
MA-5
y
coupler
antenna.
L-7
cRYSTAL sPEcr
FIcATToNS
Due to the nurnerous
freguencies
or eh€rnnels
j.:rvolved,
the
crystaLs
are
\-
not
nor3a11y
installed by tlle factory,
but by the
seller or oqrner
of
the
unit.
the
Regency
part
ntrmbers
are
listed,
in Section
1-5. When
ordering
from
another
nanufacturer,
the foIlow'ing
info::mation
shquld
be
provid,ed:
MCA 5ll
-5-
SECTTON 1
Page 9
I"
Crystal frequency,
detsmiled
as follows:
tow
Eand:,
Cryrstal freguency
=
chanurel
frequenc"y
+10.7
t'lgz
Haqr1e:
Crystal frequency=39.5
MHz
=
50.2
ltHz
-
10.7
MEz
Iligh
Barrd:
C:ryrstal. frequency
=
channel
fregugPcy
-10.7
l'tgz
3
.
E:ranple:
Crystal
freqt:enc$=155.55
!{Hz
-10.7
MEz
=
144.85 Mffz=
33
48.2833
ffiz
UHF Band; CtYStal frequency
=
channel
frequ?ncy
-lO.7MIIz
9
Exauple:
Crysta1
frequency
-
458.'0 MIIz
-10.7
l'lHz
=_333:lgJS=
49.70000
f,tEz
2.
Frequency tolerance
of O.00Lt on
lligh
Band and UIIF Eand,
0.0O2t.on Low
Band.
3. UIIF Band
-
3rd overtone,
load capacity
of 18pf; drive level of 2 nillj.qratts.
4.
vEl'
Bands
-
3rd overeone,
series resonance minus
450
Hz.
5. Ma:(i.uum i.mpedance of 35 ohms.
6. Ilolder is an
He-25N wittr
pin
leads
(plug-in
qpe).
MCA 611 -6-
SECTION
I
Page 10
SECTION 2
CIRCUIT
DESCRIPTION
\_
2-I
cRYSTAL
sELEcr ctRcurr
The tliro
crystals
X201 and
X2O2 are selected by
jr:npering
pins
on the
anodes
of CR209 and CR210 to the
appropriate
pln
correslnndjng
to
the
frequency
divisions
on
the
device
s5ncification
page.
When
a band
is
selected,
bias is
applied
to the
appropriate
front
end by causiig the
associated d.iodes
to
conduct througb
the
frequency
selector switch
Sw40l to
grrourd
When
the
ttH
Pj.lr
is selected,
ground
is aBplied
to R229
and
R224
tlrus
biasins
the UEF
'qR
and
mjxer,
In all
cases
exxcept
the LE select
case,
tlre
lov
band
varactors
are held
close to
gror^ulal
by CR223,
222
and
221. when
ttre ItL
Pin
is
selected
the
tt:rting va:r
actors
CR205
and
CR206 have a
varia.ble
bias
through
R243.
By
seleeting any other band
the
AFC
rhich
is only
needed
for the IIHF
is
d,isabled
by diodes
CR215
and
Cr€18.
Selecting EB atrtplies
gror:nd
to the EJ.gh \EF
RF
"'F
Q203
and
mixer
e204
bias
resistors. Varactors
CF€03 and CR204 are at
+8
volts.
Selecting
IIL
grounds
R25O
providlng
variable
bias to those
di.odes,
(CR2O3
and
CR204).
Selecting
LE
grorrnds
R203 and, R2I6 and
puts
8 volts
on the
cathodes
of
CR2OI
and
CR202. Selecting
I&
grounds
CR2OI
and
CR202.
2-Z
RF
FRoNT
END
Q201
is the
l.ow
Band \rHF
a4rlifier. varactor
tuni-ng
is used
in
the
input
and
output
circuits
to detenine wtretlrer
the
circuits are
tuned
to the
upper
or
lower
segnent
of the
low band.
The RF
signal fron
Q201
is
coupled
to
the
input
of the
low
band mixer
Q2O2.
Q203
is the
lligh
Band
r/EF
RF
anplifier.
lhe
input
circuit
is dor.rble-tuned.
varactor
tuning
is used
to tr:ne both
parts
of
the double-tuned
ci-rer.lits
to d,etsmrine
whether
the
cireuits are
hrned
to the upper
or
lower segments
of
ttre
high
band.
The RF output
signal
f,ron
9203
is coupled
to
the
jnput
of
the high
band
mixer
e2O4.
Q205
is
the
\i'flF
RF anpU.f,ier.
varactor
tuning
is
used
in the
input
and
output
to
detemine vthether
the circuits
are
fi:ned
to the upper
or Lower
segi*ents
of the
UHF band.
2-3
osc
r LI-AToR/MULT
r
pLr
ER
Q2O8
is the
crystal controlled
local
oscillator.
ttre fundanental
frequency
of
the crystal
is
taken fror
the enitter
cj.rcuit for
low
band VHF
injection.
The
thiril hanmonic
of
the crystal
frequency is taken fron
the collector
circuit
for high
band
injection.
When
operating on
UHF, the third
hamonic
of
ttre c?ystal
freguency
at
the collector
of
Q208
is coupled
to
a frequency
t:ipJ.et
Q2O7
which
nultiplies
the
\v
frequency
by
three for
UIIF
injection.
Q2O7
!s
tr:rned
on only
for UIIF
operation.
Ihe fundasrental
freguency
of ttre crystal
is
nultiplied
by nine
for
UHF
injection.
MCA
611
-1-
SECTION
2
Page 11
2-4 LF.
lhe
first f.F. frequency 10.7 MEz, fro
any
one of
the
nixers,
is fed
tlrrough
u-
F20L
(a
nonoU.thic
crystaI
f,ilter) to the ingqt of
IC2OI
(Pin
18). Bettreen
Pins
18 and 3
is the second I.F.
nixer
circuit. Crystal X203
is used to
generate
the
second
L.'O.
frequency
(10.245
MHz) used to
nix with
the 10.7 !4Ez
I.F. to
produce
the second I.F.
frequency
455 fcuz. The 455 KEz
signal
at
Pin 3
of IC2O1
is fed
througb CF201, a nartron
band
ceranic filter centered at 455
KHz,
to
Pifi
5
of IC201.
Bebreen Pins 5
and 10 of IC201, there are auplif,iers,
U.miters
and
a
qr:adratrrre
detector
cj-rcrrit. Ihe
adjustable
quadrature
coil
is counected between
Fins 8 and 4
of IC201.
Z-5
AUD
r o
Ttre denodu.lated audio fro
pin
10
is
de-euphasized
by
R262 and
C255 and
capacitively coupled through the squelch sritch
Q2O9
to the
arrdio anplifier
7C2O2.
The
squelch amp
and
squelch switch are inside IC201. A
logical
low on Pi$ 14
(audio
being
recej.ved) sets
Pin 16 Higb
tneirely
providing
bias
to
Q2O9
and,
allowing ar:d,io
to
pass
into IC202. A
Higb
on Pin
14
of, fC201
(noise)
produces
a low on Pin 16,
IC2O1,
grounding
the bias ctrrrent
on
Q209
and squelching
the audj.o.
The
noise level at which
the squelch
switch engages is
controlled
by
R403,
the squeleh control.
2-5
TWo-ToNE sEoUENTIAL DEcoDER
Audio
enters
at AO and
is lj.nited by CR3OI
and,
CR302. Ttre arrdj.o
is
tlpn
filtered
by a high-Q
d,iqital
filter
and
the aaplified outirut
appears at Pin
1 of
IC304.
The
voltage
has to be 4 rmp
in order
to trigger the detector
in IC3O3.
The audio
is
fr:rther auftlified by IC304 and
the
output PiJr
7, IC304
is fed
to the ha:monic
detector
of
IC303
(Pin
5).
the ha:monic
detector
wi].l
stop the
decoder
from detecting any
ha:monics
of
tlre
tone
to be decoded
When
the correct tone is
present,
the
detector
output,
after being
delayed,
fires
a one-shot.
The one shot ti.ne constant is set by R316, R317
and
C313 and
can be varied
by R317 to fit
the user's
particular
inter-tone tj"uing.
The digital
f,ilter itself
is an 8-5n1e filter.
ltre filtered
output
frequency
is
deternined from
the clock freguency. The relationship is
f"1o.L,/8
=
fftlter.
fhe clocks are
gated
from
either
Pin 1 of, IC301 or IC302,
dependi:rg
on
whetlrer
j.t
is
the first or
second tone
to be decoded. The
clock
is selected by the
oscillator
switch output of fC303.
Tone
A
(tbe
first
to be decoded)
is
selected
by the
adjustnent
of R3O1.
Si-urilarly
Tones B and c are
set
by
grounding
manually
Pirl
7,
I.C3O2
rria
JO3O1
and
settj.ng
the
second tone
and then
ungrror:nding
it
to set
the thid
using the trirmj.ng
potentiometers
R320
and R318,
respectively.
!*ten
Tone
A is
received,
the one-shot
is fired,
oscillator
switch 1
is
grounded
and
oscillator
switch
2
goes
high
(.5v).
IC302
is now
the
clock
source and
rC301
is
used
to alternate
between ttre two
cLocks for Tones
B and
C, by
alterrrately
grounding
and
ungrounding Pin
7
of fC302
gating
first the clocks
for
Tone
B and the
Tone
C
into IC303.
ltre
period
of oscillation
on Pin
7
of
fC302
is 200ns.
MCA
611
a
SECTION 2
Page 12
When
the
second tone has been
received
(Tone
B or
lone
C) before
the
one-strot
has
tj-ned
out,
the latch
is set and,
Dll
i.s
gror:nded,.
lhis ciuses Pin
14
of
IC2OL
to
go
low
turaing
off
that the squelch
switch, which
t'r:rns
on
Q209
ttrus
unsquefcfiing
the radi.o.
2-7
LAmP LoGIc
AND
rGNrrER
DRlvEs
!{hea
a signal
is decoded and Pin Dll
goes
1or,
it sets
the
latch
Pin
6,
IC2O6C
trIotlrlf,
Pin 4..I.C2OAB
"Iligh",
thereby tuza.ing on
both ttre high
rate'rALgRTo
flasher
consisting of IC205D
and
IC206tr and
the
two igniter
drives.
lfie user nay
select,
via
a
juaper
pin'
which
drLve he requires eittrer
pulsed
or
unpulsed. Ehe loqr
on
Pin
6,
IC2O6C
disables both the;A€ on
logic consisting of
IC2O4A
and ttre low battery
i-ndicator
consisting of IC204B.
CI2O5F and IC2O5C are the slow light
logic circuits
for
the
low
battery iJrdlcator..
A11
of
the
logic
eLeneots activate the LED on the front
panel
by
fo:*rard
biasing
Q2l1
i:rto conduction.
2-8 DEcoDER RESET
Resetting the
decoder is
accougrlished by driving Pin
13 of IC303
to
less ttran lV
for at
least
25os.
Xhis uay be done in three
eraysr
the
carrier
controlled
reset,
tlre
t:ine
out reset and front
panel
sltiteh
Sl{405.
The
front
panel
switch
j.s
t}re
only
way
to reset botb the signal
light and the decoder.
a
junper
is
i.nstalled
at
the factory fro fiI-Dls
to
,IU-D13.
Ttrj.s allows
the decoder
to reset in
the
absence of a
carrier
so
tbat. it
crn be ready
to decode
the next nessage.
The flashing ligbt indicating thae the radio has already
received
a messaEe
nf,rst
be
reset nanually via
Slf405
To nonitor the
radio
traffj,c for
30
sec to 3 minutes
a.fter
a :Bessage
has
been
received, switch the
juugter
from
fi-D15
to JII-D14
and
set the RC
tiuring net",!ilork
R293
for the time
you
Cesire. when the
circuit
has
timed out,
Q214
will
stop conducting
making
the base
of
Q304
go
high causing it
to
conduct
and
tbereby resetting
the
decoder.
Again
the flashing
light
will
renain on
rrntil
manually
reset to
let the
user know a
message
has
been received.
!'lCA 6L1
-3-
SECTION 2
Page 13
SECTION
3
ALIGNIiIENT
PROCEDURE
Page 14
A.
FINAT
TEST
PROCEDUP.E
MCA
611 ON
CAI,L AI"ERT RECETVER,
R.F. Alignnent Procedure
r.
Test
Set-Up
A'. Equipment
1-
F.l,t. Signal Generator
2.
AC
VT\/lt
capable of
measuring
455
KHz
3.
DC Voltmeter
Note: If
a
radio has
two
crrirstals
in
the
same banci.,
a
f::equency:aidway between' them should
be used
€or
the
tune-up
procedure
so that
the RF
amp
will
be broad
tuned.
The
anode of CR209 mrst
be
jurnpered
to the
spare
pin
on the anode of
CR210 and
then
jumpered
to
the correct
band
pin
(LL,
UH,
llH,
etc.
)
. Tf
the
radio
uses both bands of a
given preselector,
tune
the.upper
range to
a niddle
frequencr;
first,
then
switch to the lower
range
and check
the
rnid,
band
sensitivity
there.
fn
the
case
of UEF adius{: R243
to achieve
rated
sensitivity and.
for high
VIIF'
ad.just
R250
to achieve the lower
band
sensitivity.
por
the
low
VI{F
bands tune for
the best
cornbined
sensitivity.
Some
compromise in sensitivity
rnay
be necessarv
betrveen
any two
bands. f f only
one frequencv
is bej.nc,r
used
for
a
given
preselector
then
tune
up the
radio for
best
sensitivity on that
particular
frequency.
nariio
Preset
L-
Connect DC
power
suppllr
to DC
power
connection,
top
nin
of 3-pin
connec.tor
on the back
of the
radio.
(The
DC
'power
supply can be
substituted
by usincr
the
radio's
own AC
su5rply; 117V 60i{2.)
2-
Set
radio controls as
follows:
a. Volume
-
comfortable
listenj.nq
level
b.
Squelch
-
upper
most slj.de
position
c. Alert,/monitor
switch
-
in nonitor
position
B.
MATERIAL
APPLICANO}I
g
ln
GI
I
s
I
A
F
ci
z.
. t er
co*titu*tcAno*s
t'e
{eff,^cy^
slrelLlrE BEAcH,
FLoRIDA
3a93?
APPROVALS
UNLESS OT}iENWls€
SP€CIFI€D
orMEilslotrs
ARE. ll{
r}icilEs.
TOLERAI{CES
AFE
FRAGT.
OEC
ANG.
!
.xxf
t
.xxx!
FI}IAI ?EST PROCEDURE
I'!CA
511
O}I EALL AIEF.T RECEIVER
lP-14-2s4
DO I.'OT SCALE
DRWG.
Page 15
t
)
i
f
t
d.
Duty
Switch
-
in normal
position
€.
Frequenry
slritch.- on
frequency
to be
alicrned
..*,
E.
On/Off
switch
-
in ON
position
3. Install
crystals
a. Put
crystal
in
socket
X201
(XTL
socket
farthest
from
speaker),
X201
corresponds
to
"normal',
freq.
b.
Run
band
select
jrrnrper
from
anode
of
cR209
to
tire
correct
range
select
pin.
c.
X2OZ
corresponds
to
the
two
farthest
from
speaker.
LL
30-39
isz
LF 39-50 YtEz
HL 145-160 tlEz
Quadrature
Aligrrment
1. I{ith
no
signal
applied,
put
the
on Pin
10 of
IC201
(A0
Pin)
and,
voltage
is
3.5 volts.
band
select
pins
HE
150-170
l{Hz
UL
450-470
!.tHz
ttE 475-500
r,lHz
DC Voltneter's probe
adjust
L2L6
until
the
f .F.
Alignment
1. connect
the
FM
signal Generator
to
the antenna
input
jack.
Accurately
set the
freguency
to the
center
of
the
channel
bei,ng
used.
for
aligmment.
tilodulate
the
Signal
Generator
with
1,000
tlz,
3K KHz
deviation.
2.
Connect
the AC Voltmeter
to
pin
5
of IC20l
(foil
side
of board,)
.
3.
Set AC Voltseter
to
the
100rnv
scale
4.
Adjust
the
signal
Generator
output
until
the
AC voluneter
reading
is
mid-range
5'
Ad.just
L208 for
maxinn:m
AC voltmeter
reading.
Re-ad,just
the
signal
Generator's
output
to
maintain
voltmeter
reading
near
mid-range.
Note:
ff the RF
segnents
refuse
to
tune
up
or will
not
al1ow
fuIl
rated
sensitivity,
check
the
position
of
the
band
select
pin
with
respect
to
the
frequency
of
the
crystal
and
the
band select
jurnper.
with
the frequency
select
switch
sw4cl
in the
normal
position
crystal
X201
(farthest
frorn
speaker)
and
the
pin
cl.osest
to speaker
are
"turned
on".
Low VEF
Segrment
(30-50
ItEz)
1.
Connect AC Voltmeter
to
Pin
5,
IC20l.
2.
Set
AC
Voitmeter
to the
100 millivolt
scale.
3.
Make
sure
band
select
pins
are
set
up as
per
Note.
4.
set the
signal Generator
accurately
to
the frequency
of
the channel
being used for
aliqnment.
Connect
the
generatorrs
output to the
antenna
input
jack.
Adjust
signar
Generator's
output
until
AC vortmeter
reading
is
mi.d-range.
5.
Adjust
L20L
and
L206
for
naxj:num
AC voltmeter
readino.
Re-adjust
signal
Generator's
output
to maintain
vortneter
ORAWN
DATE
srzE
A
PART
I{JI'8ER
TP-14:254
R€V.
A
APPRovgo
6 +..- C / Z,n-**-
9ATE
x/,n2r9
DO NOT SCALE
DY.'G.
SCALE
sHtseT
2
Page 16
read,ing
near
mid-range.
Repeat
adjustments
until
no
further
improvements
can
be-made.
High VHF
Segrnent
(145-170
t!Hz)
l.
Connect AC
Voltmeter
to Pin
5,
IC201.
2. Set
AC Voltmeter
to the t00 nillivolt
scaIe.
3. t4ake sure
the band select
gins
are
set
up as
per
Note.
4.
Set' the
Signal
Generator
accurately
to
the frecluency
being used for alignnent.
Connect
generatorrs
output
to
antenna
input
jack.
Adjust
Signal
Generator's
.
output until AC
Volfineter
reading
is mid-range.
5. Adjust L203
and
L205
for
maximum
AC Voltmeter
read5.ng.
Re-adjust
Signa.l Generator's
output
to maintain
voltmeter
readS.ng near mid-range.
6. Now adjust
L209 and L211 and
repeat
all adjustments
until
no further inprovement can
be
rnade.
UHF Seguent-
(450-500
YHz)
l. Connect AC
Voltmeter
to
Pin
5,
IC2OI
2.
Set
AC VoLtmeter
to the 100 millivolt
scale.
3.
.Make
sure
the band select
pins
are set
up
as
per
Note.
4.
Set the'Signal Generator accurately
to
the
frequency
being
used
for aligrunent,.
Connect
generator'f,output
to
antenna
in5rut
jack.
Adjust
Signal
Generator's
output.
until AC
Vcltmeter
readi.ng is mid-ranqe.
5.
Adjust
C226,
C228 and C245
in that
order for maximum
AC Voltmeter
reading. Re-adjust
Siqnal Generator's
output to maj.ntain voltmeter
reading
near
mid-ranqe.
Receat
adjustments until
no further
irnorovemint
can
be
made.
Note:
If sensitiwity
is
poor
(qreater
than
.7rnv)
or
if
sensitj,vity varies
ntore than
3dB while
AFC
voltaqe
is
varied
from 1
to
7 volts,
detune
L211
two
turns
CCW.
AFC
Aligrunent
1. With
the unit on a channel
with
a UHI'
crystal
and
no
RF
input,
adjust L2L6 for
a voltmeter
reading
of
approxfunately
3.8
volts
at the
junction
of
R253
and
R249.
Its
setting should be within
a
turn
of the
setting
in the
quadrature
alignment.
B.
Carrier Reset
Option
(See
Note
on Page
4)
Set
alertr/nonitor
switch into monitor
position.
I.Iitl
no RF
signal applied,
adjust
sguelch
for
desi.red
squelching
action.
Return
alert/monitor
switch
back
to the alert
position.
r
)
t
E
:
(r.
H.
1.
2.
3.
tP-L4-254
DO NOT SCALE
DS/G.
Page 17
J
I
I
4. Apply enough
RF
signal
to
guiet
the receiver
and sicmal
^.
""
the unit
with
proper
tlto-tone sequence.
5" The squelch
should
ogen allowing
the listener
to hear the
remainder of the second
toners
duration and the message
lamp should
flash at a high rate
6. Turn off applied RF
signal
so that
the radio
goes
into the
sguelched mode. The decoder is
now
reset and no
signal
other
than
the
proper
two-tone sequence wil.l
open
the squelch
7. The MSG LED should renain
fLashinc until,
the reset switch
is.moved into the
reset
position.
C.
Time-Out Reset
Option
t.
Unsolder the
factory
installed
carrier
reset
junper
from Jlt-Dls
and solder
it to
W-D14
(collector
of
9214).
2. Turn up
Rr.
signal enough to
quiet.
the
receiver,
3.
llodulate
the Signal Generator
with
the
proper
two-tone seguence.
4. The sguelch should open,
allowing
the
receiver to ooerate
normally'for a
given
perj.od
of time.
This
time
period
can be
adjusted by
varying R293.
The
llSG LED will
be flashing at
a
very
fast rate
and will reqain flashing when the decoder
has
been reset.
5, ?he ltSG L.ED can
be reset
by
pushing
the
reset srritch
to the riqbt.
Battery Voltage
l{arning
AdjusUnent
(for
battery equipped models
only)
\v
1.
Place a DC Voltmeter
probe
on test
point
ltll
and adjust R296
for
4.0 volts. trhe
slow flash rate
alar:n
will
trigoer when
the
battery voltage
reaches
ar.rproximately
9.9 volts.
E. Igniter Drive
(used
with !,IA-24)
1.
A
junper (factory
installed)
runs
from
the bottom
solder 1ug
of the
three
terminal
connector
on
the
rear
panel
to the
eollector
of
Q2L2.
2.
To
provide
a
.pulsed
output, simply
pull
the
pin
fron
e213
and
put
j.t
on the collector
pin
of
Q2L2.
Acceptable
Performance
Limits
Sensitivity
Audio
power
.48yv
worst case
.
5
watt
Note:
Carrier reset
should
not
be used in areas of low signal
strenqthr
BS it will
decrease
the
radio's
decode
sensitivity
to around
12dB
sinad.
If thj,s is the
case
in
your
area, use
time-out
reset.
ORAYJT{ OATE
srzg
A
PARf ilUTB€R
TP-14-254
n€v.
A
APFRoI/ED
Fa^^ f, - /4*
wE
tt,/tr/w
DO NOT SCALE DWG.
SC:LE
4
Page 18
^xll
K
\-BATTEtrt
VOLT
€E
AD.'USTTETIT
T.P
Qczec
sAr{o
OLll
SELECT
f1o
ao+
C
aao2
C)azo6
fluXa
\'l
o"o'
.---.e228
6o.oP
n
1206
C
o2o3
\-/
Ottou
Oo2or
Otaae
,^.
L
203
uo'
to
FROi{T OF RADIO
RECEIVER
AIIO
CHRYSTAL
SECTIOT{
,^.
Lzil
o.PoozoE
PART
fiUXEER
1'P14-254
DO NOT
SCALE
O\{G.
FIGURE
I
Page 19
Tt
40 vDc
FROTT OF RADIO
tc303
tc302
i-=J
t
Cf$o'o,
R3rg
R320
tf
rc204
te2'06
f)oett
Ooaos
JU U4 TtrE
TITER
l_
ouT
@Tlo*
nr€
qrT
ADTIUSTIEilT
,ru
Dl5 caRRtER
CONI{ECTED
TO
RgSET
,rU
Dl3
ICT{ITER
DRIYER
PULSED
fionmeu-v
D|G|TAL
FtLTEF,
lcNrTER
DR|VESTLOt
BATT. IHD|CATOR,
CARR|ER,
T|ME'
OUT
RESET
RGURE 2
rc20€
ORAWN
OATE
srzE
A
PAPJ
HUHEER
TP14-254
REV.
A
APPROVED
7 .f
-
\ /- )J.-^ iJ l
-3/
MTE
l t
/t'..*r,
DO NOT SCALE
DIIJG.
SCALE
snEel
6
Page 20
<q
tn
N
I
g
A
E..
O;SLUG FLUSH
I
I
*#
POSITIVE
NUMEERS
ARE
COUIITED
AS
NUTE€R
OF
TURfttS
CLOCKWIS€
FROil
FLUtil,r
POSITTOI{.
LOU VHF TUNITIG CHAR?
HIGH
VHF TUNIIIG
CHART
FIGURE
3
PART
f{UX8ER
TPL4_254
APPRovEo
.-'
_-r
/Jr+.,/.t'
DO NOT
SCALE
DVJG.
Page 21
o
6b
ssr!,!
foDEcREEs
(trAxc)
CANTCNOR
?@
PLA1E
sHOUil IN
POStTtOil
OF
rtx
c
ALL
YALUEs ARE
CIVEII III
DEGREES
27A
Fior
IAX
C
COUtlTEn
CLOCrrtSE
c22e
o
Oo
475
IHr
ttSO
ilHr
4E5 IH:
{eO IHz
4EOTH:
SOgllHz
EO
o
90
360
r80
160
27o,
t80
jgoo
278
3600
o
270
90
oo
UHF
TUNIIE CHART
FIGURE 4
REV.
A
?P14-2
54
Sheet
I
Page 22
I.
TESI
PROCEDT'RE
T!{O-TO
c
s
ltt
(\
dt
4.
S<ternally
oodulate
the
RF signal
generator
r*ith
the
tlo-tone
oscilLator,
naking
sure eaeh
tone
is nodulated
at 3KtIa
deviation.
C. CJ.ock adjustnents
L. Using
a
frequency
counter
-
a.
Connect a high input
i.npedance
anplifier
to
Fin 1
of IC3O1
in
tbe radi.o.
b. Connect the
output of tbb aoplifier
to
the input
of
an acc-urate
frequency
counter.
c. Adjust
R3O1 until
the counter
reads
eight
tiares
the
value
of
'
the first tone
(ltone
A).
d.
Aewve
the
end of,
JO3OI
ttrat
eonnects !'rit!t
Pin 1
of 1C301
'nd
1et t!:at end
hang free.
e. Disconnect
the
probe
of
the
aqlifier
going
to Pin
I of IC3O1
and
connect it
to
Pin
1 of, IC3O2.
t.
Adjust R318 r:ntil
a
frequency
of eight
tines
tone frequency
B
is read on the frequeney
couater-
9t.
Ground
the
end
of
,IO3O1
feading
to
Pin 7
of IC3O2.
h.
Adjust n320
r:ntil
eight
tj.ues
the frequency
of tone
C is read
on ttre frequency
counter.
i. REplace JO3OI
on'
tlre
pla.
2.
Using
an osciLloscope
-
a.
Connect
probe
of oscilloscope
to Pin I
of fC3O1.
Set
vertj.cal
sensiti.vity to .lv
per
division. r
b.
Adjusc
R302 so
that the
period
of the
oscillation
displayed
on
the oscitrloscope
is
as
follows:
toscA
-
l/
(8
x fO)
,
where
fO is
the
frequency
of Trone
A
c" Put
in enouEh signal to
quiet
the
receiver
and modulate
the
sigmal
generator
with
just
Tone
A. Ttre
oscilJ.oscope will
now
be
s'witching
between
a high
and
a
low
frequency
oscillation.
d. tilc\d
connect the
oscilloscope
to
pin
I of
fC302.
you
will
obserne two
different
oscillator frequencies
being
switched
at about 100ros
rate.
e.
one
oscillati.on
period
will
vary
with
the adjustraent
of R31g.
Adjust
this
period
to
-
toscB
=
I/
(8
x fr),
where
f,
is
the frequency
of Tone
B
f.
The other
oscillation
period
i.s adjusted
by R320.
Adjust
R320 for
a
period
to
-
Tosc.
=
L/
(8
x fa)
,
where
f"
is
the frequency
of
Tone
C
o
(''
=
o
DRA\II{
DATE
stzE
A
PART HUTEER
'I!p'l
4-t 1
q
REV.
A
APPROVEO
/ \.n-,
O.
/ern_n^
o.AIE
ttnV
t7
DO
NOT SCALE
DWG.
SCALE
Page 24
D.
edjusting
the
fnter-Tone Timing
!{odulate
RF
sigmal
generator
sith Tone
A.
Connect
oscilloscope
to
Pin 17
of IC3O3.
Adjust R317
for
this
period.
One
shot
period - period
of
lst tone
+ period
delay
+ period
2nd
tone.
l,lodulate RF
signal
with
the
t^we-tone
sequence.
ttre message
Light
wiJ'l
co'm'on
and the
squelch
will
open.
E:<ample: SupSr,ose the following
frequencies were
needed:
TONE A
-
349.0
TO!{E B
-
389.0
TOiIE
C
-
410.8
Usiog
an
accurate frequency counter
-
lhe
reading at
Pin
l
of fC3Ol
urrst
be adjusted
to 8x'
349.0
ltz
=
2,792 Hz.
lhe
adjustaent is
done rith
R301.
1.
2.
3-
t
ll
I
rl
t
the
order of the next trrc
Tones B and C
is uningrcrtant.
witlr
the
probe
oar
Pin
2 of
IC302 and JO301
pulled
up, adjust
R318
for
eight.times
one of
the otlrer
tones
-
say
Tone
C,
8
x 41C.8 Hz
-
3,286.4 Ez.
Norr
gror:nd
the
junper
against the case
and adjust a32O
for I x 389.0 llz
=
3
,112
IIz.
Norr
adjust
the
inter-tone tining
according
to
ycur
requi.remeits.
Suppose
tlre
pe=iod
of the first tone is
.75 sec.
and
the.pe:iod
between
tones
is .5
sec
the
final tone
is
also .75
sec,
then
One
shot
neriod
=
period
of
lst tone
+
period.
delay
+
period
2nd
tone
=
.75s
+
.5s
+75s
=
2s
The
adjustment is
nade with
R317
and
set
with
the scope
probe
on
pin
17
of
rc303.
To
do
the
sane exanple
problem
with
an
oscilloscope
i:rstead
of a
frequency
counter
-
1
t-
=
.=..358x10-6
-oscA
8 x f*
Set
the scope for
about 50 x 1O-6s7Div
Then divide
35E
x
rojr
=
7.16
Div -
for
one
cycle
50 x 10--\
Div
The
other two tonbs
are set in the
sanre fashion.
0RAWt{
DATE srzE
A
PART
NUI'8ER
TP14-219
Rev.
.q
AFPROYED
i? .
__7_--T
/ 44t:
i
f
/.Jt,,1.t2.-
0ATE
u
/, rJ-*+
DO NOT
SCALE
DWG.
SCALE
t3
Page 25
8.,
Unit
Testing
l. With
earrier Reset Option
-
a. Set
alert,/nonitor
srritch
i:rto
spnitor position.
'
b.
With
no
RE
sigmal applied,
adjust
squelch
f,or desired
squelching actj.on.
c.
Retutrr
alert/rcnitor
switch
back to
the alert
position.
d. .1pply
enough RF
signal
to
qrrlet
the
receiver
and
signal
the
unit
w"ith
the
proper
txro-tone
sequence.
e.
The sqgelch
should open
allorring
the
listener to
hear
the
renainder of the
second tone's
dr:ration
and
the message
.
lanp should flash
at
a high
rate.
f.
lurn
off applied
RF siFal
so
that
the
radio
goes
i-nto
the
squelched
urode.
the decoder
is now
reset
and no
other
signal
other
than the
proper
tno-tone
sequence will
open
the squelch.
9.
The MSG
LED
should renain
flashing
until
the
reset switch
is
rcved into
the reset
position.
2.
lrith
Ti-ae-o|rt
Res€t
Option
-
a.
TuJrt up RF
signal enough to
quiet
the
receiver.
b. Modulate the
signal
generator
with
the
proper
tao-tone
sequence.
c. The
squelch should
open, allowing
the
receiver
to
operate
nomally for a
given
geriod
of
time.
This time
period
can
be
adjusted by vary!.ng
R293.
The t{SG
LED will
be flashing
at a
\rery
fast
rate
and wj-ll
remain fla$ring
when
the decoder has
been reset.
d.
[he t4SG
tED
can be reset by
pushing
ttre reset
switch
to
the right.
F.
Acceptable
Performance
Lirnits
Frequensy
Range
*
2Og
-
3,906
IIz
Frequency
Cor:nter will
read
1,664.-
31
,24g.
Decoder
Sensitivity
12dB Sinad
IOO*
detect
6dB
Sinad
75r
detect
Audio
fnput
at Pin
5
of
IC303
must
be
1.3vpp
or
greater
rFor
tone frequencies
lo\der
than
3C0 IIz
it
uray
be necessary
tq
change
C301,
C316 or C317 respectively
to 820pf.for tliose
oscillators
below 30O ilz
only"
PROPER
TONE
SEQUENCE
Tone A
Tone
B
or
C
0iAvIr{
OAT€
stzE
A
PART
I{UHEER
TP14-2I9
REV.
.\
APPRov€o
.t-,',- A-
2:
-
oal6
1: ii
p,ht
DO NOT
SCALE
OWG.
SCALE
4
SH€ET
+
Page 26
4
>:
:l
.i:
l!1
CN
6t
l
!.
A
E{
<J
d
ct
E
r
TEST PROEE I
q
)
I
c
-----|
{AL#
I
I
I
I
f
RAoro
I
_(_
HIGR \
PSDA{CE
ATP
/
TEST TNTERCON
FIGI
t-r
I TWO Tof'lE I
I
sEouerrro,-
I
{ eerenaron I
7--.,
I
powen
supeuv
I
I
FREOUETTCY
I
-t--g$l:!--i
NECTIOil
.DIAGRAT
JRE-I
0RAWll
OATE
SIZE
A
PART
flUTBER
TP14-219
REV.
A
o*soueo
r.,*,ffi
D^rE
I
tf
L/\
DO NOT
SCALE
0\{c
SCAL
€
lsl{€ET
l3
Page 27
FRONT
OF RADIO
rc303
[_lrcaoz
R3IE
R320
[n3'7
R30r
[f
t-t
rc30t
I'l
o+--ro
3or
prr
ilrc3o4
TPl4-219
DO NOT
SCALE
DWG.
Page 28
Lt5r
af
D
I
420
'l
I::,
ir":.
,I
l''
la6
ll
00
-lr'
.oot
It
rlzar
ttD
+
i
I
I
I
I
l
I
sr4ol
l- I
lmm_l
n250
roI
n25t
DI
Page 29
av
lot:1.
,
r. u oPrcAm
vAllEs M
SErFr€D fErc ft
rm!.
l[
iEm
Y
uiE3
iq SEC|FEo onarc
aiE
ffi,
l/al.
...,
z.Qorm P[ @ro il Pc. uro.
a
Llocm
qncurr
IE
mrxr.
OE{m
FrrEi nE
mrxr.
o^O
DEMB SiB ll nIHt
-8Xfi6
m tr JutEislol'rffi}.
---
Emrtt uio miilta.
-----
oflolEl ctia[ v iqrw.
(r)3.
n w
FEq{rcrEs
A,8ac
wEB ru
30d&,ffi m,
c3t6
0R cl7 RtsEcnELY D A6 F_
f *
---T---*;*__l
I oztt I ozro I
I
cnzrr
I
I
lursl-l
| czel-l
I azs I nzm nzer I
I craor I
I
we I czs
I
Ipol-l
lxrzorl-l
lrull-l
lmml-l
lrcul-l
lo*l-l
lcarel-l
Incaln*l
lcrml-l
F---,=------f---------
1
-
-I
I
L
al
-l
1..,
1_
tcs
*se
+-
247L I
ft
=l
I
.lr6
-
-'t
)rt.
'Jlr:
)rl
-J
t"
e'
?rcx
i-
.u-
_3
l l
L5.-
P l
I
L--l>ts3
ll-1 Ir I
v
J-
utit
-r
[:-= ,z'eL
l:l l\:J
a
:a.z
rn," A-
tot"E
-\-
H}
t+
Ec!!slc_
|
',1
.l
izs
-lloox
lt
I lcam
I t+*
I
*.rr
l_rilr
t-
tz:
€0
I
Y
_i
6
aa.
;6i'-
t
5--
ft
*''"
in t
-
f".,
e ac!9
ia3
59t
222
@
.T, *:. .iP
I
q
t
f,'t
rume T
rd
_-i
ulo
+.q
lrDr
6
ffi
ls I .oo"lt T .ol,Li \Z
i:* *t*
Luu
I_
i;il
t
64
5F
6V
JS:pz-
r,rr,t
b
[, t2
2Dl
;*
-l
I
mx:r
rcr
I
{q
-'oer
-----l
Jcz
t
r
+r
t";
JU?Iz f
r
-----t<^ot{Nw
tl
6r
?rc
Eii J0,
;*T*T-.-1
'"1L_
,l
L___
f-- m
L_Jro
-;u
c'li
eo(r?ol
rox
I
.-
t3o2 I t305
-G
-+w
I r2ox I |
?2K
e
If
I LeTl
r6v l- T 2l
JU,6 l=rzl
oo!.
L--l
;;91
I
'e\
I
-.......u
LBorl-l
R43 l-.l
sxq.
l-l
lo'l-l
cror
l-l
arorl-l
Jrorl-l
sPror |
-
I
roror
|
-
|
im
1_39*
@
Its,
l=
i
{
I
ruzl
tzo,tnt
rr4
l-'lr-1r--1-trlnTr|rrr I
L-----------J-'
/\""
n269
l0(
-fis
lmh
_ae
:
16v
l_-__Jiil
IM
!W.RB.
I
tc2ila
I
+
m4
l-
dLw
L
px
GXm flEi
uiru(E!
503
R306
I TEG
f--!*'.rox
*
r
EXER
EJ I
si
l6r?
6lrcc
rto
m
il
w osLl
'ot
'.w
rd.
lcicl
.rc
lrcc
I
r"
R276
il-5n5--------+l-
-}[I
6]
LI
lE6)
lo.*J
a--
c-€
\
sl07
'@.i
-{
_]-c,*l
II
| .,sa)
o
I li'.
t6
l^.,
n| slfl
le
r9at
ea?
68X
c3l8
rl
I
! ..
^ns
\44q
-L@
=r8ti.
JUS
f^"
q,.r1
lo19
lY.
l--rmor--1
I
I
roi
'N
'IffiD
L
:
l6F
orr-f
I tr
re
I
DUTY
2
|
*ll*t--]".
IoY"r-r_:;----\€erF
kt--ft---rn-
sasts2stE€a{ff
tt $ol
0tG|TAL FtLtEi tc
30t
IAFFET
gffE
F
ul
mol
BmRD
I
.r tf
2-7
I
tc26t
n?la-
Q Au-
tL/1F:f
rI-
^
R324-4.?i
J- J'
ia25
,
tEc
c319.
I
r .1,--3'+-
Rs
l
tlEG
I
c2
I
cmraoL
I URo
_
?@1
_{5
- l'' *,
l---a+v^,-
'IF
II
r;-offiH
Y'Fss
.i?.
l.:,^]_,, ll,"- r^
#_.p+j,"I
l^
a? Al
;"K"
rtr|
-.'il'-'*'eiioi
-{)i7,ot
*
r13'-l
cn'
,
I lm l-
tlls
.
'
tt'"
t__
:ro(
i
i5.4
-
+
ri'w
3-3
SCHEMATIC
a
rl
Y
J _-._
r. rc30a
l" rr3s
ril,!RT--
L
I .{-:.^/ffiI
I I I lrpa,'*r
-t
T
*..t
Ljr;jl
,c26A
4cz6a
zo<4L
JU
--w-J""
lyn
r's
z\\
l
\l&*
! sA952 2
cR2p
L:I
l'ztt
of mndrc
F.l"4l
snums,Mnst
3Ct{ErAnC
llc^6llr ilulD
-E
Page 30
3-4
TOP
VIEW
Page 31
Page 32
SECTION
4
cAPAC
rJoRS
ICICATION
PARTS
LIST
RECE
I VER
DESCRIPTTON
27pf
-LO
NPO 50V"
22pf LO l{Po
500V
2.7pf
NPO 50Ov
27pf
LO
!{PO
50v
.001
mf
+8-2
50v
3.9pf 10
llPO 50OV
.47pf J.0
gpe
MC
27pf
10 NPo 50v
3.9pf
10 NPo 500v
.001-trrf
+8-2
50V
joolnr
+g:2
5OV
.001nf
+8-2
50V
l5pf
10 NPo 50Ov
.005uf
+8-2
50v
3.9pf
10 NPO
500v
.OOsnf,
+8-2
5OV
l5pf 10 NPo
500v
.O05mf
+8-2
50V
.001mf
+8-2
50v
390pf
50v 5
lcQ-17
.68pf
10
Type
Mc209
15pf
10 NPO 5O0v
5.6pf
10 NPo
5O0v
47O
pf
20
5Ov
ZsF
.001nf
+8-2
50v
llrin 2.5
-20pf
.001trrf
+g-2
50V
rrin
2-6pf
.oosnf
+8-2
50v
.005nf
+8-2
50V
6.8pfL0
NPo
500v
.47pf 10
Qpe
MC
.001nf
+8-2
5ov
82pf 5
NPo
50V
.001nf
+8-2
50v
3.9pf
10 NPo
50OV
27pf
LO !{PO 50V
27pf
LO NPo
50v
. ooklf
+8-2
50v
.001nf
+8-2
50v
47Opt 20
50v z5F
47Opf
20 s}v
zsF
47opf
20
50V zsF
15pf
10 NPo 500v
Trirr
2-6pf
lsopf sov s
rcQ-17
.olmf
+8-2
50V
68pf 5
NPo
50v
.1trrf
+8-2
50V
.47mf
15v
2Q
PARf
NI'MBER
c201
c202
c203
c204
c205
c206
'
c207
c208
c209
c2LO
c211
c2l2
c213
c2]'4
c215
c2L6
c217
c218
c2L9
c220
c22L
c222
c223
c224
c225
c226
c227
c22A
c229
c230
c23L
c232
c233
c234
c235
c236
c237
c238
c239
e240
e24I
c242
c243
c244
c245
c246
c247
c24A
c249
c250
I,ICA
611
L500-0270-650
L500-0220-605
1500-0279-20s
1500-0270-550
1503-0102-003
1500-0399-905
1510-0478-900
1500-0270-650
1500-o399-905
1503-0102-003
1503-0102-003
1503-O102-003
1500.-o150-605
1503-0502-005
1500-0399-905
1503-0502-005
1500-0L50-605
1503-0502-005
1503-0102-o03
1506-039L-s50
1.510-0688-900
1500-o150-605
1500-0569-905
1523-0471-002
1503-0102-003
1517-0000-034
1503-0102-003
1517-0000-035
1503-0502-005
1503-0502-005
1500-0689-905
1510-0478-900
1503-0102-003
1524-0820-002
1503-0102-003
1500-0399-905
1500-0270-650
1500-0270-550
1503-010?-003
1503-0102-003
L523-O47L-OO2
1523-0471-002
1523-0471-002
1500-0150-605
1517-0000-035
1506-0I51-550
1503-0103-007
I524?0680
-002
1503-O104-010
1515=04?8-0O3
-l-
SECTION
4
Page 33
LOCATION
c251
c252
c253
c254
c255
c256
e257
c258
c259
c260
c26l
c262
c263
c264
c265
c266
c267
c268
c269
c270
c27l
c272
c273
c274
c275
e276
c277
c278
DESCRTPTION
.001nf 10 100v
.l?nf
+8-2
50V
33pf
r0
NPo 500v
47Apf 20 50v
Z5F
not
used'
.2nf+8.t2 12V
.oLnf
+8-2
50V
8.2pf
L0 NPO 500v
.oltrrf
+8-2
50V
.0047rnf
10 100v
150pf 5
50v T'f.Q-L7
.001nf 10 100V.
.OOlmf l0 100v
5nf 25V
type U
.068nf 10 100v
.0033nf
10 100v
.01mf,
+8-2
50v
.05nf
+8-2
25V
lOOOmf
15v
Tlpe
U
100!rf I6V
85D
T\pe
.2mt
+8-2
L2v
220mf. 16v 85D
223af 10v 85D
?ype
.1uf
+80-20
L2v
.ltr f
+80-20
L2v
.05stf
+8-2
25V
1mf
15V 20 tant
27&nf
LOv
85D
lYpe
coil
choke .68uhy
Wilco
coil TtiRH RF Ant
choke LM-2
RF
fnput
coil
coil
coil
RF
(wht)
coil
Loop
(T)
coil
Osc 450MlIz
choke
12
Uhy
choke
12
Uhy
coil
T!4R
coil
PART
NTIMBER
1508-0102-6ro
1503-0104-010
1500-0330-505
1523-O471-002
1502-0204-oo6
1503-0103-007
1500-0829-905
I503-O103-007
1508-0472-610
1505-0151-550
1508-0102-510
1508-O102-610
1513-O050-O03
1508-0683-610
1508-0332-610
1503-0103-007
1502-0503-003
1513-O.[Q2
-002
1513-0101-002
1502-
q2n4-oo6
1513-0221-S62
15L3-0221-001
1502-0104-006
1502-0104-o06
1501-O503-003
1515-0010-003
1513-O221
-O02
1800-3152-013
1802-0688-OO3
1800-3152-001
1803-5125-903
1800-3152-002
1800-3152-012
1800-3150-006
1800-3191-401
1800-3152-014
1800-3160-004
1800-3152-009
1800-3160-OO3
1803-1313-.f
o0
l803--1313-1C0.
1801-1235-900
1800-6055-801
c0iL
L20l
L202
L203
L204
L205
L206
L207
L208
L209
t2LO
L211
L2L2
L213
L2I4
L2T5
L2I6
MCA 511
SECTION
4
Page 34
INTEGRATED
CIRCUITS
LOCATION
I-LZ UI
tc202
rcz03
rc204
rc205
rc206
RES I STORS
R201
R202
R203
R204
R205
R206
P.207
R208
R209
R210
R211
F.2I2
R213
P.2L4
R215
R215
P.2L7
R218
P219
R220
F.22l
e222
R223
R224
R225
R226
R227
F.228
F-229
R230
R231
R232
R233
P.234
R235
R236
R237
R238
R239
P'24A
R24L
F.242
R243
R244
MCA
611
DESCRIPTION
IF Sub Sys
Nat Ll,l 380N
78-L08
8v
LM358N
MC140l1
CP
MM
74CO4N
(A11
resistors
are
tw
5*
PART
NUMBER
3130-6056-500
3130-3157-614
3130-O000-o14
3l_30-3I67-909
3130-3157-628
3130-3157-617
noted)
4704-0L82-O32
4704-OLA3-O32
4704-0L03-032
4704-0393-032
4704-A393-032
4704-OLO2-O32
4704-0101-032
4704-0I03-032
4704-OI03-032
4704-OLO2-O32
4704-OTOI-032
4'704-0182-032
4704-0393-O32
4404-O182-032
4704-OW3-O32
4704'0223-032
4104-A223-O32
4704-OLA2-O32
4704-0103-032
4704-0223-032
4704-O101-032
4704-027t-O32
4704-0222-A32
4704-O103-032
4704-0680-032
4704-0222-O32
4704-0393-032
4704-01_03-c32
4704-A223-O32
4704-0680-032
4704-OLO2-032
4704-0222-032
4704-0393-O32
4704-ALO2-O32
4704-0580-032
4704-0103-032
4704-0472-A32
4704-0823-032
47O4-OTO2-O32
4704-0680-O32
470[-0393-O32
4704-0393-032
4751-0103-002
4704-0391-032
-1
t.8K
10K
10K
39K
39K
IK
IOO ohm
l0K
10K
1K
100 oiu
1.8K
39K
1 .8K
l0K
22K
22K
IK
1oK
22K
100 ohn
270
ohn
2-2K
10K
58
ohm
2.2K
:gr
10K
22K
58
ohm
LK
2.2K
39K
1K
68
ohm
10K
4.7K
82K
IK
58
ohm
39K
'39K
10K var
390
ohrr
unless
otherwise
-3-
SECTION
4
Page 35
LOCATION
R245
R246
P247
R248
R249
R250
R251
R252
R253
R254
R255
R256
R257
R258
R259
R260
R261
R262
R263
P264
R265
R256
}iZ6 I
R268
R269
R270
R27T
R272
R273
R274
R2'75
F.276
R277
R278
R279
R280
R281
p.82
R283
R284
R285
R286
F,87
R288
R289
R290
R291
D?q,
R293
R294
R295
P296
390
ohm
39K
470
ohn
39K
39K
10K
var
1.0K
47K
39K
180K
L00K
680K
270K
tr.5
meg
1.5
neg
47K
47orc
8,2K
470K
27K
27K
z70K
3.3
ohm
120 ohn
tw
Sc
10K
68K
47K
68K
27K
10K
2zx
10K
10K
IOl(
l-oK
not
used
100K
100K
not used
2.7
meg
1
meg
217
meg
I neg
rbrc
39K
I meg
l00K
I
meg
470K var
12OK
470K
470K var
DESCRIPTIQN
PART
NUMBER
4704-O39L-O32
4704-0393-O32
4704-047L-032
4704-0393-032
4704-0393-O32
4751-0103-002
4704-O103-032
47A4-O473-032
4704-O393-O32
4704-OL84-O32
4704-OLO4-O32
4704-0684-032
4'IO4-O274-032
4704-0155-032
4704-O155-032
4704-0473-A32
4704-0474-032
4704-r.Jg_22-032
47O4-O474-032
4704-0273-032
4704-O273-032
4704-A274-032
4704-0339-032
4704-O121-034
4704-OIA3-O32
4794-A683-O3Z
4704-0473-032
4704-0683-032
4704-0273-032
4704-ota3-o32
4704-A273
-a32
4704-OIC3-032
4704-OtO3-032
4704-0103-032
4704-O103-032
4704-OL04*O32
4704-OIO4-O32
4704-0275-O32
4704-0105-032
4704-0275-032
4704-OtO5-032
4704-0103-032
4?04-O393-032
4704-0105-032
4704-0104-032
4704-0105-032
475L-O47.4-0A2
4704-OI24-O32
4704-O474-O32
4751-0474-OO2
MCA
611
-4-
SECTION
4
Page 36
TRANS ISTORS
IOCATION
920I
Q2O2
Q2O3
Q2O4
Q2Os
Q2O6
Q2O7
Q208
Q2Oe
Q2LO
Q211
Q2L2
Q2L3
Q2L4
D
I
ODES
CR2OI
cR202
cR203
cR204
cR205
cR206
cR207
cR208
cF209
cR210
cR211
CP.2L2
cR213
cR214
cR215
cR215
cR217
cR218
cR219
cB22A
CF'22L
cR222
cF.223
cR224
cR225
cRz26
cR227
ce228
cF.229
cR230
cR231
ce232
cR233
cR234
MCA 511
DESCR.IPTION
PART
NUMBER
4801-0000-025
480I-0000-026
4801-0000-025
4801-0000-o26
4801-0000-026
4801-O000-026
4801-0000-026
4801-0000-I00
4801-0000-016
4801-OO00-O16
4801-0000-005
480I-0000-005
4801-0000-o16
MPS H81
PNP
MPS H8I PI{P
MPS H81
P!{P
MPS
H81
PITP
MPS H81 PNP
MPS H81
FI{P
MPS H8I
PNP
sM-4306-5
sPS-952-2
not used
sPS-952-2
MPS AO5
l4PS
A05
sPS-952-2
MVIl72
lfi/I172
t"ff220I
MV2201
l,IV220I
!ry2201
rN4148
rN4L48
rN4148
IN4I48
MVLl72
MV220L
rN4148
rN4148
rN4148
rN4I48
IN4I48.
rN4148
rN4148
rN4148
rN4148
rN4L48
rN4148
rN4148
rN4002
rN4002
rN4002rN4002
Zener 5.1V
rN4148
rN4148
rNA148
rN4148
IN4I48
4809-0000-001
48oe-oooo-ooi
4809-0000-004
4809-O000-o04
4809-0000-o04
4809-0oto-004
4805-1241-200
4805-I241-200
4805-1241-200
4805-L241-200
4809-O000-001
4809-0000-oo4
4809-124I-200
4809-L24t-200
4809-1241-200
4809-1241-200
4809-1241-200
4809-1241-200
4809-1241-200.
4809-1241-200
4809-1241-200
4809-124I-200
4809-1241-200
4809-L241-2AO
4806-0000-004
4806-0000-004
4806-0000-004
4806-0000-004
IN523IB
4808-0000-
031
4805-1241-200
4805:1241-200
4805-1241-200
4805-1241-200
4805-124I-200
-5-
SECTION
4
Page 37
LOCATION
DESCRIPTION
PART NI]MBER A
CRYSTAL
x2o3
crystal
10.245 l4Hz 2301-3151-601
CRYSTAL
F
ILTER
xF2Q1
Xtal
filt-
2P
10.7
Mttz
27O5-3232-2OO
c
ERAM I C
F,I
LTER
CF201
cer filter
CIU455D2
27OO-32O9'5OO
Lif
t4cA
611
-6-
SECTION
4
Page 38
FECODER
CAPAC
I TORS
LOCATION
c301
c302
c303
c304
c3o5
c306
c307
c308
c309
c310
c311
c312
c313
c314
c315
c316
c317
c318
c319
c320
DESCRTPTION
47Opf 50v
LcQ-17
,47mf
15v 20
.lnf 50v
+8-2
Y5B
.047nf l00V I0
.047mf
t00v 10
.o47frf 100v l0
."047trrf
l00v 10
.047nf
100v
10
.047mf
10OV
10
.O47mf l00v 10
.047mf 100v t0
.1uf 12V
+80-20
rc-L2
knf 15v.
l0mf 10v
85D
rII Tyl;e
lnf 16v 85D III
Type
U
470pf
50v rcQ-17
47opf 50v
LCQ-I7
tgrf I5v 20
T360
.47mf 15V 20
10pf NPo
5OOV
PART NUMSER
1506-0471-550
1515-0478-003
1503-0104-010
1508-0473-610
1508-0473-610
1508-0473-610
1508-0473-610
1508-0473-610
1508-0473-610
1508-0473-610
I508-0473-610
1502-0104-006
1515-.O010-003
1513-O100-001
1513-0010-002
1506-0471-550
1506-0471-550
I515-00L0-003
15r5-0478-003
Is01-0100-001
3130-6050-700
3130-5050-700
3130-6062-000
3130-3167-909
475t-5429-AA5
4704-0L24-A32
4704-0103-032
4704-0682-032
4104-0223-O32
4704-0105-032
4704-0105-032
4704-0103-032
4704-0274-032
4704-0224-032
4704-0103-032
4704-0682-O32
4704-0I03-032
INTEGRATED CIRCUITS
rc30l
rc3o2
rc303
rc304
RESTSTORS
R301
R302
R303
R304
R305
R306
R307
R308
R309
R310
R31l-
R312
R313
R314
2 tone
osc
SC74204
2 tone osc
SC74204
2 tone diq
fil
sC742O3
r-rr{358N
I
meg
1 neg
10K
500K
120K
IOK
6.8K
22K
var
270K
220K
10K
6.8K
not used
l0K
MCA 611
SECTION
4
Page 39
LOCATION DESCR]PTION
PERT
NUMBER
R315
R316
R317
R318
R319
R320
R32t
R322
R323
R324
R325
R325
R327
R328
TRANS r ST0BS
Q301
Q302
Q303
Q304
DJODES
cR301
cR3o2
cR303
cR304
cR305
cR305
cR307
cR308
I meg
470K
I meg
var
50OK var
5.8K
500K
var
5.8K
68K
l5K
4.7K
I meg
3-3
meg
1oK
10K
4704-0105-032
4704-0474-O32
4751-0105-002
475L-5429-AO5
41O4-0682-Q32
475L-5429-OO5
47A4-0682-032
4704-0683-O32
4704-0L53-032
4704-O472-032
4704-O105-032
4794-9335.032
4704-0103-032
4704-0103-032
sPs
1475
sPS 1476
sPS-952-2
sPs-g52-2
rN4148
rN4148
Diode
Gsm
Diode Ge:m
Diode Gsm
Diode
Ge:m
rN4148
rN4148
Blue ?op
BIue
Top
4801-0000-003
4801-0000-003
4801-O000-015
4801-0000-o16
4805-1241-200
480s-1241-20d
480?
-1233-900
4807-1233-900
4807-1233-900
4807-1233-900
4805-1241-200
4805-L24L-2AO
MCA
611
-8-
SECTTON
4
Page 40
RES I STORS
R4o1
R402
R403
s}.l
r TcHEs
sw401
s?r402
sw403
sw404
sw4o5
DIODE
I,D4O1
(AI1
resistors
470
ohrn
tvl
5K
var
7.5K var
switch,
switbh,
switch,
switch,
switch
slide
slide
slide
slide
SPDT
SPDT
SPDT
CONTRO.L
BOARD
are Lw
5*
r:nless
othsrrise
noted)
4704-047L-A34
4752-5L35-302
4752-5L35-307
51I3-323I-60I
5113-323I-601
5113-5135-203
5113-5 135-203
5113-3231-501
4810-1282-900
Diode LED Red
MCA 611
-9-
SECTION
4
Page 41
-f
\41
I
CHASSIS
LOCATION DESCRIPTION
R10t
resistor 1 meg
T10l
transfor:rner
SP10l
spkr2x6Sohm
r4cA
611
PART
NUMBER
4701-0105-044
5604-5100-600
1301-5101-000
-10-
SECTION 4
Loading...