Realistic TRC-411 User manual

CUSTOM MANUFACTURED IN KOREA FOR TANDY CORPORATION
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PLEASE READ BEFORE
USING THIS EQUIPMENT
L. ASt7C1
Cat  .
21 505

Your ---
74z-/St7c---! TRC-411 40-Channel Emergency Mobile CB
Transceiver gives you security and peace of mind whenever you're on the
road! It's ultra-simple to set up and use — just connect the supplied
magnetic-mount antenna and plug the 12V DC power adapter into your
car's cigarette lighter socket. You're then ready to report accidents ... ask
for assistance ... find out about traffic conditions ... or any other commu-
nications you need. And when not in use, you can store your TRC-411
under a car seat, in the glove compartment or in the trunk — until you
need it again!
Your TRC-411 uses a built-in 40-channel PLL synthesizer circuit. The
Phase Lock Loop is a new technique for generating all the required
frequencies with a single crystal. The result is much tighter frequency
control with superior reliability.
FEATURES
•
Plug-in powerful magnetic-base antenna (for use on metal car roof or
hood)
•
Plug in 12V DC car adapter (plugs into cigarette lighter holder)
•
EMERGENCY Switch instantly selects Channel 9 for emergency use.
•
Travel case (for easy portability and storage)
•
Bright green ON THE AIR LED indicator lights when transmitting and
modulating.
•
Bright red CHANNEL 9 monitor LED indicator
•
Phase Lock Loop circuitry for precise frequency control and stability
over all 40 channels
•
Three ceramic filters for superior selectivity and freedom from adjacent
channel interference
• Bright red LED channel indicator
• Built-in Automatic Modulation Control
• Hysteresis-type squelch circuit (RECEIVING RANGE CONTROL)
automatically compensates for signal fading, to eliminate signal
"chopping" during message reception.
•
EXTernal ANTenna Jack
•
Works with negative ground 12-volt DC system
•
Built-in Automatic Noise Limiting circuit
• Uses 3 ICs, 17 Transistors, 1 FET and 16 Diodes
For your own protection, we urge you to record the Serial Number of this
unit in the space provided. You'll find the Serial Number on the back
panel of the unit.
Serial Number:

C.R.S. LICENCE (AUSTRALIA)
Before transmitting with your Transceiver, you must obtain a Depart-
ment of Communications Citizens Radio Service Licence. Obtain an
application form, from the D.O.C. Before completing the form you
should read the conditions governing the licensing and operation of the
Citizens Radio Service (Department of Communications brochure RB-
249). This brochure also can be obtained from the Department of
Communications. After completing the application form, mail it with the
appropriate fee to the Superintendent, Regulatory and Licensing in the
state or territory in which the station will be operated.
BEFORE YOU CALL FOR HELP
Our repair centers receive many returned products which are actually
working perfectly. Maybe the owner just did not read the instructions, or
overlooked something. Or perhaps the problem was a blown fuse (in the
built-in 12V DC Car Adapter) that the owner could have easily replaced.
So read this manual carefully and be sure you understand all the basic
features of this CB — and the special ones, too! And before you assume
your Transceiver needs repair, refer to the Service and Maintenance
section of this manual, to see if the problem is something
you can
eliminate.
Enjoy your Realistic TRC-411!

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SPECIFICATIONS
RECEIVER
Frequency Coverage
Sensitivity
Adjacent Channel Rejection
Intermediate Frequency
Audio Output
Frequency Response
Cross Modulation
Squelch
TRANSMITTER
: All 40 CB Channels (Class D)
26.965 to 27.405 MHz
0.5 ii N/ or better for 10dB S + N/N
: 60dB (at 10kHz)
greater than 100dB (for 20kHz)
: 1st IF = 10.695 MHz, 2nd IF = 455
kHz
: 4 watts (max.)
: 450 — 2500 Hz
: 50dB (or better)
: Adjustable from 0.5/4V to lmV
Frequency Coverage
Power Output
Emission
Modulation Capabilities
Spurious Radiation
Frequency Tolerance
Antenna Impedance
Current Drain (13.8 volt supply)
Accessories
: All 40 CB Channels (Class D)
26.965 to 27.405 MHz
4 watts (maximum)
: 8A3
: +90%, —100%
: Less than --65dB
: Better than 0.002%
: 50 ohms
: 850 mA (no modulation)
1500 mA (full modulation)
: Magnetic-Base Antenna
12V DC Adapter
Travel case

CHANNEL 9 LED (RED)
Lights when EMERGENCY switch is
at CH9 position.
Channel Selector
Use to select any one of the 40
channels available.
EMERGENCY Switch
Instantly selects
Emergency Channel 9.
Microphone
Talk here.
VOLUME ON/OFF Switch
Turn clockwise to apply power to
the Transceiver and then adjust for
desired sound level.
RECEIVING RANGE
Permits you to cut annoying back-
ground noise when no station is
being received. When properly set,
your radio will remain silent until an
audible message comes through.
PUSH TO TALK Bar
Speaker
— Press to transmit. Release to listen.
Listen
CONTROLS AND THEIR FUNCTIONS
Front
ON THE AIR LED (GREEN)
 LED CHANNEL Display
Lights up when transmitting and

Indicates which channel you are
modulating.
 operating on.

Bottom
N
N
12V DC
POWER
PLUG
12 VOLT DC CAR ADAPTER
Inserts into car cigarette lighter (Has
polarized plug and 2 amp fuse)
12V DC JACK
EXT ANT Jack
ANTENNA PLUG
(Insert into ANT jack on
the bottom of the unit.)
MAGNETIC BASE EXTENDABLE
ANTENNA
Fully extend and place on a FLAT
AREA of metal car roof or hood.
N

USING YOUR TRANSCEIVER
Note: The magnetic-mount antenna supplied with your TRC-411 is de-
signed for use while your car is not moving. If you want to use your
TRC-411 while your vehicle is in motion, see your local Tandy for a
mobile CB antenna.
Do not transmit without a suitable antenna connected to the ANTenna
Jack.
Setting Up
1.
Remove the Antenna and Car Adapter from the Travel Case.
2.
Fully extend the antenna and place its magnetic base on the vehicle's
roof — if vinyl roof or convertible top, place magnetic base on hood of
vehicle. Insert the antenna plug into the ANTENNA Jack on the
bottom of the Transceiver.
3.
Insert the 12V DC Car Adapter into your vehicle's cigarette lighter
socket. Plug the other end into the 12V DC Jack on the bottom of
your unit.
Note: This unit is designed for operation with a 12V, negative ground
system only.
Since all cigarette lighter sockets are not identical, it may be
necessary to pull the Car Adapter out, slightly rotate it and then
re-insert for positive contact.
TO RECEIVE (listen)
1.
Set RECEIVING RANGE Control to DISTANT position (maximum
counterclockwise).
2.
Turn power ON (by rotating VOLUME clockwise).
3.
Select the desired channel by rotating Channel Selector. Or, in an
emergency, flip the EMERGENCY switch to CH9. (After communica-
tions are over, be sure to set EMERGENCY switch to "down" position
(CH1-40) so you can listen to other channels.)
4.
Adjust VOLUME for a suitable listening level.
5.
Adjust RECEIVING RANGE Control to cut out annoying background
noise when no signal is being received. To do this, set Channel
Selector to a channel where no signals are present (or wait till signals
cease on your channel). Then, rotate RECEIVING RANGE Control in
a clockwise (LOCAL) direction to the point where the background
noise just stops. Now, when a signal is present, you will hear it, but
you will not be disturbed by noise on the channel in between signals.

When properly set, RECEIVING RANGE Control will keep the receiver
"dead" until a signal comes in on that channel. Do not set RECEIVING
RANGE Control too high, or weak signals will not be able to "open" the
Squelch circuit. To receive weak signals, it is best to leave RECEIVING
RANGE Control set to DISTANT (minimum position).
NOTE: The RECEIVING RANGE Control circuit in your Transceiver is a
special advanced development. It uses two extra transistors to
accomplish a hysteresis action. The result is that when you set
RECEIVING RANGE Control for precise signal level, if that signal
level fades (decreases or increases in strength), the circuit will
follow this change. With conventional squelch circuits, often a
signal which changes strength gets "chopped" by squelch and
you lose a portion of the message; with hysteresis RECEIVING
RANGE, you get it all.
You've also got a built-in Automatic Noise Limiter (ANL) circuit which
helps to reduce or eliminate low-level impulse-type external noise. This
special circuit is always active.
TO TRANSMIT
1.
Select the desired channel (either using Channel Selector or EMER-
GENCY switch).
2.
Press the PUSH-TO-TALK bar. Hold the unit at a slight angle about
2" — 3" (5 — 7.5cm) from your mouth and speak in a normal voice.
ON THE AIR LED will light up and flicker as you talk.
3.
To Receive, release the PUSH-TO-TALK bar.
NOTES ABOUT CHANNEL 9
Channel 9 has been set aside by the DOC for emergency communications
only, and is to be used only for emergency communications involving the
safety of people and property — it is especially useful for motorists who
need assistance.
We've incorporated a special switch that puts you on Channel 9 instantly.
In an emergency you don't want to spend time turning the Channel
Selector until you reach Channel 9. Just flip up the EMERGENCY switch
and you're on Channel 9. A red LED will show you the unit is operating
on Channel 9. Be sure to flip the switch down to the CH1 - 40 position
after you're finished using Channel 9.

Many persons have CB base stations in their homes. If you need
assistance, you can try to reach a home base station, and ask the person
who responds to call your relative or friend to come to your aid. However,
DON'T USE CHANNEL 9 for this. Remember, channel
.
9 is used only for
emergencies.
SOME HINTS TO HELP YOU ENJOY YOUR CB
• Wait for a pause in transmission before asking for a break.
•
If you do not receive an answer after a second call to another station,
sign off and allow others to use the channel — waif a while, ask for a
break and try again.
•
Do not Dead Key (hold PUSH TO TALK bar in).
•
Assist callers with directions, road conditions or other requested infor-
mation.
•
Keep harassment off the air. This is unnecessary and causes problems
for everyone including you.
•
Be courteous — treat others the way you wish to be treated.

OPTIONAL ANTENNAS FOR PERMANENT
INSTALLATION
If you desire permament antenna installation for your CB Transceiver, use
an antenna especially designed for CB frequency of 27 MHz. See your
local Tandy store for appropriate antennas. To use standard CB anten-
nas, you have to use an adapter, such as our 278-208.
STRAIGHT TALK ABOUT CB
" The effective range depends on several factors:
a) the type of antenna used
b) antenna mounting height
c) terrain, city with tall building, hills or other obstructions reduces
range. Best range is over water or flat land.
d)
weather conditions and
e) number of other CB'ers on the same channel at the same time.
•
Weather and atmospheric conditions such as lightning, sun spots and
other electrical interference will result in strong static and limit TRANS-
MIT and RECEIVE range.
•
"Skip" (long distance communications) is possible when CB signal is
reflected back from ionized atmosphere.
The relative range, under normal and favorable conditions, is shown below.
This should not be taken as a minimum range of performance, but rather
as what can be expected under favorable circumstances and proper
antenna mounting.
MOBILE TO MOBILE: 2 to 8 km (1-5 mi.) on land and up to 16 km (10
mi.) across water.
BASE TO MOBILE: 8 to 16 km (5-10 mi.) on land and up to 24 km
(15 mi.) across water.
BASE TO BASE: Up to 32 km (20 mi.), depending on type of antenna,
height and terrain.