Tandy RADIO SHACK Realistic Patrolman pro-2 User manual

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PB6polman ™
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LOW-HIGH VHF SOLID STATE MONITOR COMMUNICATION RECEIVER
~EALlsûé PATROLMAN PRO-2 LOW-HIGH VHF
SOLID STATE MONITOR COMMUNICATION RECEIVER
The Realistic Patrolrnan''" Pro-2 VHF Solid State Monl-
tor Communication Receiver is both tunable and crystal
controlled through the range of 30-50 and
152-175 Mhz.
It is a completely self-contained unit, that operates from
either 117VAC 50/60 cycles or 12VDC negative ground
power supply. Features: built-in monitor speaker; 30
semiconductors; separate front end tuners for each band;
automatic noise limiter; OTL output; zener stabilized
power supply; automatic frequency control; plus many
others.
18 Silicon Transistors, 8 Diodes, and 2 Thermistors
TRANSISTOR
& DIODE COMPLEMENT:
No. 20-160
PRODUCT Of RADIO SHACK®
DIVISION OF TANDY CORPORATION
Transistors
6FrontEnd Transistors
2 Crystal Oscillator Transistors
3 I.F. Amplifier Transistors
1Limiter Transistor
1Squelch Transistor
4 AF Amplifier Transistors
1 AGC Amplifier Transistor
Diodes
1 ANL Diode
2 AM DIodes
2 FM Diodes
1 Zener Diode
2 Reerifier Diodes

Patpolman pPO-2 ™
GVHF-Hi (Blue) Main
tuning control for high
frequency scale 152-
175 Mhz.
HVHF-Lo (Red) Main
tuning control for low
frequency scale 30-50
Mhz.
FSwitch for crystal or
manual
tuning opera-
tion.
Iliuminated slide rule
dial with colored scales
- blue for high band
- red for low band.
EMode of operation -
FM or AM signaIs. Press
rocker switch tor best
signaI reception.
DSwitch selects band de·
sired - high or low -
by color identification,
blue for high band -
red for low band.
C Adjustable squelch
control that eliminates
unwanted background
noise during
"no sig-
nal" conditions.
DUAL-BAND SOUD STATE VHF MONITOR COMMUNICATION RECEIVER
Operational Characteristics of Each Control
..----------------..aIl! .... ----_
K
A Phonel speaker panel
jack. Provides use of
externa I spea ker or
headphones. 8 ohm irn-
pedanee. When used,
built-in speaker is auto-
matically cut oft.
BAdjustable volume con-
trol with power ONI
OFF switch.
REARVIEW
1Antenna jack (Motorola --- __ ~
type) for connection to
external antenna (ei-
ther base or mobile).
2Line Cord Bracket-When
using receiver on DC, it is
advisable to wrap AC line
cord around line cord
brackets provided,
3Output jack for recording on tape
any transmissions you may want to
record on a tape recorder. This jack
can also be used with an external
amplifier speaker system.
6Power connector plug
for use on 12V DC op-
eration. Note proper
wiring connections.
5117VAC line cord.
DCI AC siide switch provided
for selection of power to be
used 117V AC or 12V DC.
Note: Set will not work on
AC if switch is on DCnor
will
set work on DC with the
switch in the
AC. position.

DESGRIPTlON:
GRYSTAL OPERATlON*
DG OPERATION
Socket
ry}
DC OII11DAC
Slide Switch
The Patrolman ™Pro-2 receiver can receive both AM
and FM signais. This is done by depressing a "rocker"
switch to either the AM or FM mode on the front panel.
If in doubt as to rhe mode, place this switch in the
position which results in best reception at the center
of carrier.
An
output jack (rear panel) can be used for either tape
recording transmissions or for feeding the input of an
external amplifier.
A
phone/speaker jack rnounted in the front panel
allows the use of. an external phone/speaker. When
using this jack, the built-in speaker is automatically
shut-off. An ideal external speaker is the Realistic Model
SP-ISO,Cat.
No. 20-1500.
This unit has an adjustable squelch con trol that elim-
inates
background noise in the absence of a signal. When
adjusting the conrrol, rorate it clockwise until back-
ground noise is barely audible, The squelch circuit is
completely electronie
and does not use relays.
For satisfactory performance an antenna of no less
than
8 ft. can be used. However, for best results, the antenna
should be specifically designed for the desired frequency.
A
matching dual band antenna is available from Radio
Shack, Cat. No. 20-015.
An
AC/DC slide switch is located on the rear panel.
Wh en in the DC posirion, the switch disables the AC
power supply and conneets the DC power to the socket
on the back panel. A
plug is inc1uded for conneetion
to a 12VDC
supply or to the Realistic portable 12 volt
battery pack, Cat,
No. 20·1501.
There are provisions for crystal con trol operation on
both the 30-50 and 152 to 175 Mhz band. Crystal control
operation is desirabie whenever the receiver is set to a
single frequency for a
long period of time as it eliminates
the necessity of critical
tuning and also compensates for
any
slight frequency drift that may occur.
Crystal soekets are
provided inside the unit. Unscrew
plate on bottorn of the cabinet to insert crystaIs. To
receive high or low band signaion crystal control, insert
crystal
into the proper socket (H = high band, L= low
band), depress crystal/ manual switch in crystal position,
place band switch
into either red (low band) or blue
(high band) position, and tune the signaIpresent for
maximum volume. If there is no signal present, there
will be an increase in background noise or sensitivity as
the receiving frequency as determined by the crystal is
reached
when dial is tuned to this frequency.
Both crystal soekets are marked with identification for
low
or high band operation.
MOBILE INSTALLATION
GA bracket is provided for mobile
mounting. The most
practicallocation would be under the dashboard of an
~====bl;
auto or truck. A series of holes are provided in the
bracket so that advantage can be taken of various combi-
nations of
matching holes on the vehic1e dashboard.
* When ordering crystals, specify model number of set and the fre-
quency you wish to receive. Send
order to our Radio Shack Ware-
house, 2615 West 7th Street, Fort Worth, Texas. Al10w 3 to 4 weeks
delivery,
order crystals under catalog No. 20-001.

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AM-FM
AC OR DC SWITCH
L: 30- 5üMHz
H:152-174MHz
ON-OFF W/VOLUME
M : MANUAL
X : CRYSTAL
C6 1DOP
M
No.4
No.3
No.S ~~----t-
NO.7
152-174MHz.
FRONT END
Hl
05 06 07
SELECTOR
SOURCE
BAND SELECTOR
MODE
POWER
LO No.8
No.7
FRONT END
- --
No.2
No.l 30 -
50MHz.
No.9
Ol 02 03 No.4
No.3
:-:,: No.2
No.l
Sl a->c
S2a,b
S4a,b
S3
S5
50- 750 •I
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-ANTI I:L
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Jl Sla II
SCHEMATIC DIAGRAM