21-1705.fm Page 1 Thursday, September 7, 2000 10:41 AM
TRC-511 40-Channel
Mini-Mobile CB Radio
with Channel 9/19 Priority Switch
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ˆ Features
Two Ceramic Filters
channel selectivity and prevent adjacent
channel interference.
Your RadioShack 40-Channel Mini-Mobile
CB Radio is a great way to communicate
with other CB radio operators. Because of its
convenient compact size, you can use it al-
most anywhere. You can mount it in a vehi-
cle for mobile use, or in your home or office
for use as a base station.
— provide superior
Universal Mounting Bracket
mount your CB securely in your vehicle, or
on a table or shelf in your home or office.
— lets you
External Antenna Jack
— lets you attach
Your CB has these advanced features.
an optional antenna to your CB radio for in-
creased range.
Emergency Channel Switch
— lets you
quickly switch to channel 9 or 19 to monitor
or report emergency situations.
TX (Transmit) and RX (Receive) Indicators
— light to show when the CB is transmitting
or receiving.
Full Legal Power
— gives you the full range
of CB channels with the maximum allowed
transmit power.
Up/Down Channel Selector
— lets you eas-
ily select a channel with the press of a but-
ton.
Adjustable Squelch
— helps to eliminate
noise between transmissions.
Automatic Noise Limiter (ANL) Circuit
—
reduces impulse-type noise during reception.
5-Pin DIN Mic Connector
— uses five
prongs to reinforce a clear connection be-
tween the mic and the receiver.
Automatic Modulation
— prevents the
transmitter signal from over-modulating and
distorting.
(PLL) Frequency Synthesizer
— provides
highly accurate and stable tuning.
Crystal-Controlled Digital Tuning
—pro-
vides precise transmission tuning capability
when selecting a channel.
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Features
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FCC INFORMATION
The Federal Communications Commission
(FCC) does not require you to have a license
to operate this CB radio. However, you must
know Part 95 of FCC Rules. These rules ap-
ply to the operation of a Class D CB. We
have provided a copy of these regulations
with your CB radio.
Warning
: Do not open your CB radio to
make any internal adjustments. A CB radio is
set up to transmit a regulated signal on an
assigned frequency. It is against the law to
alter or adjust the settings inside the unit to
exceed these limitations.
To be safe and sure:
• never open your CB radio’s cases.
• never change or replace anything in
your CB radio.
Your CB radio might cause TV or radio inter-
ference even when it is operating properly.
To determine whether your CB radio is caus-
ing the interference, turn off your CB radio. If
the interference goes away, your CB is caus-
ing it. Try to eliminate the interference by:
• moving your CB radio away from the TV
or radio
• contacting your local RadioShack store
for help
If you cannot eliminate the interference, the
FCC requires that you stop using your CB ra-
dio.
This device complies with Part 15 of FCC
Rules. Operation is subject to the following
two conditions: 1) this device may not cause
harmful interference, and 2) this device must
accept any interference received, including
interference that may cause undesired oper-
ation.
4
Features
21-1705.fm Page 5 Thursday, September 7, 2000 10:41 AM
ˆ Installation
Caution
: Be careful not to drill into any-
thing behind the mounting surface.
MOUNTING THE
MICROPHONE HOLDER
3. Mount the holder using the machine
screws, spring washers, plain washers
and nuts.
You can mount the microphone holder on ei-
ther side of the CB or at another location
near your receiver.
Warning
: Do not mount the CB microphone
holder where it could damage or interfere
with the operation of any passive restraint
safety device (an air bag or seat belt).
To mount the holder to either side of the CB,
1
8
use the two supplied / -inch (3-mm)
tapered-tip screws, plain washers, and
spring washers (as shown) to secure the
holder.
Mounting Surface
Note
: If you cannot reach behind the mount-
ing surface to attach the nuts to the machine
1
8
screws, use the two supplied / -inch (3-mm)
tapered-tip screws and plain washers.
MOUNTING THE CB
The most common mounting location for this
CB is under a vehicle’s dashboard. However,
if you use the CB as a base station in your
home or office, you can place it on a desk,
shelf, or table (see “Using the CB as a Base
Station” on Page 7).
To mount the holder near the receiver in an-
other location in your vehicle (such as a
dashboard), or somewhere in your home or
office, such as a nearby wall, follow these
steps.
If you are mounting the CB in a vehicle,
choose a location where:
• you can easily reach the CB
• wires and cables are clear of the vehi-
cle’s pedals and other moving parts
1. Using the holder as a template, mark the
positions for the screw holes at the
desired location.
• the CB is not directly in front of heating
vents
2. At each marked position, drill a pilot hole
slightly smaller than the mounting
screws.
• all wires and cables can reach their con-
nection point
5
Installation
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Warning
: If you use the CB in a vehicle,
4. Attach the CB to the mounting bracket
using the two rubber washers and
mounting knobs.
mount it securely to avoid damage to the CB
or vehicle or injury to passengers.
Follow these steps to mount the CB using
the supplied hardware.
1. Using the mounting bracket as a tem-
plate, mark the positions for the screw
holes on the mounting surface.
CONNECTING AN ANTENNA
There are many different types of antennas
for mobile CBs, each with its own benefits.
You can choose one that best fits your
needs, available at your local RadioShack
store.
2. In each marked location, drill a pilot hole
1
Note
: If you are using this CB as a base sta-
5
slightly smaller than the two / -inch
tion, see “Using the CB as a Base Station”
on Page 7.
(5-mm) mounting screws.
Caution
: Be careful not to drill into
When you choose an antenna, keep in mind
that, for the best performance, you should
mount the antenna:
objects behind the mounting surface.
3. Mount the bracket to the mounting sur-
1
5
face with the / -inch (5-mm) mounting
• as high as possible on your vehicle,
home or building
screws, spring washers, plain washers,
and nuts.
Mounting
Surface
• as far as possible from sources of elec-
trical noise
• as vertically as possible
Once you choose an antenna, follow its
mounting instructions. Then route the cable
ANTEN-
to the CB and connect the cable to
NA
on the back of the CB.
Note
: If you cannot reach behind the
mounting surface to attach the nuts on
1
5
the bolts, use the / -inch (5-mm)
tapered-tip screws and plain washers to
secure the bracket.
Antenna
6
Installation
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Cautions
Caution
:
: Never pull on the microphone ca-
ble.
• Avoid routing the cable next to sharp
edges or moving parts which might dam-
age the cable.
USING VEHICLE BATTERY
POWER
• Do not run the cable next to power
cables or other radio antenna cables.
Follow these steps to connect the CB to vehi-
cle battery power.
• Do not run the cable through a vehicle’s
engine compartment or other areas that
produce extreme heat.
1. Connect the red wire (with in-line fuse
holder) to a point in your vehicle’s fuse
block that has power only when the igni-
tion is in the ACC or ON position.
To take advantage of your radio’s maximum
range, adjust the antenna’s Standing Wave
Ratio (SWR) using an SWR meter, available
at your local RadioShack store.
Red Wire to
Switched ACC
Terminal
Follow the instructions supplied with the
SWR meter and antenna to adjust your an-
tenna’s SWR to the lowest possible value.
SWR values of 2.0:1 are generally accept-
able, with readings of 1.5:1 or lower being
more desirable.
2. Connect the black wire to a metal part of
the vehicle’s frame (chassis ground).
CONNECTING THE
MICROPHONE
1. Press the plastic tab on the supplied
microphone’s plug and align the 5-pin
DIN microphone plug with the corre-
Black Wire to
Ground
MIC
sponding pin holes in the CB’s
jack.
Then push the plug into the jack.
Caution
: Do not connect the black wire
Tab
to a non-metallic (plastic) part, or to any
part insulated from the vehicle’s chassis
by a non-metallic part.
USING THE CB AS A BASE
STATION
2. Slide the microphone onto the micro-
phone holder.
Although this CB radio is designed mainly for
mobile use, you can also use it as a base
station with an AC power source. For base
station installation, you need these items:
To disconnect the microphone from the CB,
press the plastic tab on the side of the plug,
then pull out the plug.
7
Installation
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• a 13.8V DC power supply that supplies
at least 1.5 amps (available from
RadioShack)
4. Connect the CB’s red wire to the posi-
tive (+) terminal on the DC power sup-
ply.
Caution
: Most 13.8V DC power sup-
5. Connect the DC power supply to a stan-
dard AC outlet.
plies plug into a standard AC outlet to
produce DC power. Before connecting
your CB to a 13.8V DC power supply,
read and follow the instructions included
with the power supply.
Cautions
:
• To comply with FCC RF exposure com-
pliance requirements, maintain a dis-
tance of at least 20 cm between this
device’s antenna and all persons.
• base station antenna (available from
RadioShack)
• To prevent damage to the CB, be sure
you connect an antenna and the micro-
phone before you use the CB.
• coaxial antenna cable and connector
(available from RadioShack)
Warning
: Use extreme caution when you in-
stall or remove a base station CB antenna. If
the antenna starts to fall, let it go! It could
contact overhead power lines. If the antenna
touches the power line, contact with the an-
tenna, mast, cable or guy wires can cause
electrocution and death. Call the power com-
pany to remove the antenna. Do not attempt
to remove it yourself!
Note:
Installation instructions are for satisfy-
ing FCC RF exposure compliance.
Follow these steps to install the CB as a
base station.
Red wire to
positive termi-
nal of DC pow-
er supply.
Antenna wire
Black wire to negative termi-
nal of DC power supply.
1. Mount the base station antenna as
described in its owner’s manual.
ANTENNA
2. Connect the antenna to
.
3. Connect the CB’s black power wire to
the negative (–) terminal on the DC
power supply.
8
Installation
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ˆ Operation
Before you use your CB, you should know
how to use it effectively and courteously.
“Operational Hints” on Page 10 contains in-
formation that will help you get more enjoy-
ment from your CB.
Note
: To receive very weak signals, turn
SQUELCH
counterclockwise. You hear
noise between transmissions, but you
also hear weak transmissions.
VOLUME
6. To turn off the CB, turn
coun-
RX and TX Indicators
terclockwise until you hear it click. The
channel display turns off.
TRANSMITTING
Note
: We recommend you try receiving be-
fore you transmit.
1. Follow Steps 1–5 in “Receiving Trans-
missions and Adjusting Squelch”.
VOLUME
MIC Jack
SQUELCH
PUSH TO TALK
2. To transmit, press
on
the microphone. The red TX indicator
lights. Hold the microphone 2–3 inches
from your mouth and speak in a normal
tone of voice.
RECEIVING
TRANSMISSIONS AND
ADJUSTING SQUELCH
SQUELCH
1. Turn
fully counterclockwise.
VOLUME
2. Turn on the CB by turning
clockwise until it clicks. The channel dis-
play lights and the channel number
appears.
PUSH TO TALK
OUT CH9 CH19
OUT
3. Set
to
,
press
or
on the base to select
the desired channel (other than an
emergency channel). The green RX
indicator lights when the CB is receiving
transmissions.
VOLUME
3. To turn off the CB, turn
coun-
terclockwise until you hear it click. The
channel display turns off.
SELECTING AN
EMERGENCY CHANNEL
VOLUME
4. Adjust
level.
to the desired listening
Important:
Channel 9 and channel 19 are
5. To cut out background noise between
transmissions, wait until there is no sig-
reserved for motorist assistance and for re-
porting emergency information about acci-
dents, hazardous road conditions, and so on.
Always give emergency messages priority.
SQUELCH
nal, then slowly turn
clock-
wise until the background noise stops
and the RX indicator turns off.
9
Operation
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To select an emergency channel (channel 9
To switch back to a non-emergency channel,
OUT CH9 CH19
CH9
CH19
OUT CH9 CH19
OUT
to . The previously se-
or 19), set
to
or
.
set
The selected channel number flashes.
lected channel number appears.
ˆ Operational Hints
Like most activities, CB radio has its customs
and courtesies. The following tips will help
you get the most enjoyment from your CB.
assistance in locating destinations. A
CB radio is also good company on those
“long hauls.”
• On construction crews, a CB radio
quickly pays for itself when you are call-
ing for additional materials or coordinat-
ing the activities of different work crews.
COMMON USES FOR A CB
Personal Uses
• Keep in touch with home while driving to
work, to the store, or to a social activity.
Let your family know you are tied up in
traffic, or that you will stop by the store
on the way home.
TRANSMISSION COURTESY
Please follow these guidelines of radio cour-
tesy when using your CB.
• Wait for a pause in someone else’s
transmission before you ask for a break.
• If you are a two-car (or more) family, CB
radios are great for communicating with
family members while they are in their
cars.
• If you do not receive an answer to your
call after a second attempt, sign off and
wait several minutes before trying again.
• Contact friends or neighbors — find out
“what’s happening” or plan
together.
a
get-
PUSH TO TALK
you are not talking. (This is called dead
keying.)
• Do not hold down
when
• Ever have car trouble or run out of gas
on the highway? What an assurance it is
to be able to radio for assistance!
• Assist callers with directions, information
about road conditions, and any other
reasonable requests.
• Camping, fishing, and other sports are
more fun with a CB radio. Locate a
buddy or find out “what’s cooking” back
at camp.
USING COMMON 10-CODES
Citizen’s band operators and CB radio users
have largely adopted the 10-codes for stan-
dard questions and answers. These codes
permit faster communication and better intel-
ligibility in noisy areas.
Business Uses
• For security officers, a CB is more than
a convenience — it is a must for both
safety and efficiency.
• Truck drivers and delivery personnel can
learn road and traffic conditions and get
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Operational Hints
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This table lists codes adopted by the Associ-
ated Public Safety Communications Officers
(APCO).
Code
Meaning
10-24
10-25
Assignment complete.
Meet _____.
Code
Meaning
Estimated time of arrival is
_____.
10-1
10-2
10-3
Your signal is bad.
Your signal is good.
Stop transmitting.
10-26
10-30
10-31
Use caution.
Pick up.
Message received and under-
stood.
10-4
Emergency traffic. Clear the
channel.
10-33
10-5
Relay information to _____.
I am busy or are you busy?
Out of service.
10-34
10-41
10-62
What time is it?
10-6
Switch to Channel xx.
Cannot understand.
10-7
10-8
In service.
Note:
Although this table lists the 10-codes’
10-9
Repeat last message.
Negative (NO).
meanings in the form of a statement, they
can also be phrased as questions (10-6: Are
you busy?, 10-20: What is your location?).
10-10
10-11
10-12
_____ in service.
Stand by.
MAXIMUM RANGE
The maximum range and quality of CB radio
transmissions vary depending on the follow-
ing conditions:
Report road/weather condi-
tions.
10-13
10-14
10-15
10-16
10-17
10-18
10-19
10-20
10-21
10-22
10-23
Information.
• the type and quality of antenna used
Message delivered.
Reply to message.
En route.
• the height of the antenna’s mounting
location — the higher the antenna, the
better the signal’s range
• the surrounding terrain — mountains
and tall buildings limit the range
Urgent.
Contact _____.
• weather conditions
What is your location?
Call _____ by telephone.
Cancel last message.
Arrived at the scene.
• the number of nearby radios operating
on the same channel
• standing wave ratio (SWR) between the
antenna and the CB
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Operational Hints
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Note
: Your CB radio’s transmission range is
Your local RadioShack store has a wide se-
lection of noise-suppression accessories.
generally line-of-sight.
REDUCING NOISE
Note:
Operation instructions are for satisfy-
ing FCC RF exposure requirements.
Because your CB is exceptionally quiet, any
noise you hear is probably from an external
source in your vehicle such as an alternator,
another radio, or spark plugs.
The transceiver uses an ANL (Automatic
Noise Limiter) circuit to reduce noise. How-
ever, if possible, try to eliminate the noise by
finding its source.
You can determine the noise’s source by
turning off the engine and operating the CB
with your vehicle’s ignition set to ACC (or
ON). If the noise is reduced, the problem is in
your vehicle’s ignition or electrical system.
Here are a few hints to help you reduce or
eliminate such noise.
• Make all CB power and antenna wires
as short as possible.
• Route the power wires away from the
antenna wires.
• Be sure that the chassis ground connec-
tion is secure.
• Replace old ignition wires with new,
high-voltage, noise suppression wires.
• Install noise suppressors on your spark
plugs, or install new spark plugs that
have built-in noise suppressors.
• If problems persist, check your alterna-
tor/generator and regulator gauges. You
can reduce the noise from these
sources by using bypass capacitors at
the various output voltage points.
12
Operational Hints
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ˆ Troubleshooting
If your CB is not working as it should, follow these suggestions to see if you can eliminate the
problem. If you cannot, take the CB to your local RadioShack store for assistance.
Symptom
Solutions
CB has trouble receiving.
Rotate VOLUME clockwise so power is on.
Make sure that the mic is connected and that the other connec-
tions are secure.
Make sure that the antenna is connected and that the other con-
nections are secure.
Check SQUELCH and adjust as needed.
Switch to an active channel.
Adjust VOLUME.
CB has trouble transmitting.
Rotate VOLUME clockwise so power is on.
Make sure that the antenna is connected and that the other con-
nections are secure.
Make sure that all connections are free of corrosion. Clean and
tighten, as necessary.
Make sure the mic connector is not loose. Firmly press the connec-
tor into the MIC jack.
Switch to an active channel.
Make sure that PUSH TO TALK is fully pressed.
Radio does not work at all.
Make sure that the CB is connected to power and that all connec-
tions are secure.
Make sure that the mic is securely connected.
Make sure that the antenna is securely connected.
Check the fuse and replace it, if necessary. See “Replacing the
Fuse” on Page 14.
Cannot select a channel.
Set OUT CH9 CH19 to OUT. Release PUSH TO TALK.
13
Troubleshooting
21-1705.fm Page 14 Thursday, September 7, 2000 10:41 AM
ˆ Care and Maintenance
To enjoy your RadioShack 40-Channel Mini-
Mobile CB Radio for a long time:
2. Hold the fuse holder by both ends, push
the ends together, twist one end coun-
terclockwise, then pull them apart.
• Keep the CB dry. If it gets wet, wipe it
dry immediately.
• Use and store the CB only in normal
temperature environments.
3. Remove the old fuse and inspect its
condition. If it is not blown, reinsert it. If it
is blown, insert a new one of the same
type and rating.
• Handle the CB gently and carefully. Do
not drop it.
• Keep the CB away from dust and dirt.
4. Push the fuse holder ends together and
twist one end clockwise.
• Wipe the CB with a damp cloth occa-
sionally to keep it looking new.
Modifying or tampering with the CB’s internal
components can cause a malfunction and
might invalidate its warranty and void your
FCC authorization to operate it. If your CB is
not performing as it should, take it to your lo-
cal RadioShack store for assistance.
REPLACING THE FUSE
The CB’s 2-A in-line fuse helps protect your
CB (and vehicle) from power surges and
short circuits. Replace a blown fuse with a 2-
A, slow-blow glass fuse, available at your lo-
cal RadioShack store.
Caution
: Do not use a fuse with ratings other
than those specified here. Doing so might
damage your CB.
Follow these steps to check and replace the
fuse.
1. Make sure the power source and CB are
both off.
14
Care and Maintenance
21-1705.fm Page 15 Thursday, September 7, 2000 10:41 AM
ˆ Specifications
Receiver
Frequency Coverage ........................................................... All 40 channels (class D) 26.965–27.405 MHz
Sensitivity ...................................................................................................... 0.5 uV or better for 10 dB S/N
Squelch Sensitivity ..................................................................... From 0.5 uV to 1 mV adjustable (nominal)
Frequency Response ............................................................................................... –6 dB 450 Hz–2.5 kHz
Adjacent Channel Selectivity ............................................................................................... 45 dB at 10 kHz
Audio Output Power ............................................................................................................................... 1 W
Cross Modulation ................................................................................................................................ 50 dB
Transmitter
Frequency Coverage ........................................................... All 40 channels (class D) 26.965–27.405 MHz
Frequency Tolerance ....................................................................................................... ±100 Hz (nominal)
Output Power ...................................................................................................................... 3.6 W (nominal)
Modulation Type ....................................................................................................................................... A3
Antenna Impedance .............................................................................................................................. 50Ω
Spurious Emission .............................................................................................................. –67 dB or better
Modulation Capability ............................................................................................................................ 90%
Current Drain ............................................... 1.1 Amps with no modulation; 1.5 Amps with 80% modulation
Power Requirements ......................................................................................... 13.8V DC, negative ground
General
Dimensions ..................................................................................................................... 57/8 × 41/4 × 13/8 in
(150 × 108 × 35 mm)
Weight (with microphone) ................................................................................................................. 15.4 oz
(437 g)
Specifications are typical, individual units might vary. Specifications are subject to change and improve-
ment without notice.
15
Specifications
21-1705.fm Page 16 Thursday, September 7, 2000 10:41 AM
Limited Ninety-Day Warranty
This product is warranted by RadioShack against manufacturing defects in material and workman-
ship under normal use for ninety (90) days from the date of purchase from RadioShack company-
owned stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED
HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES,
INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES
CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABIL-
ITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RE-
SPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE
OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WAR-
RANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVE-
NIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN AD-
VISED OF THE POSSIBILITY OF SUCH DAMAGES.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limita-
tion of incidental or consequential damages, so the above limitations or exclusions may not apply to
you.
In the event of a product defect during the warranty period, take the product and the RadioShack
sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, un-
less otherwise provided by law: (a) correct the defect by product repair without charge for parts and
labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase
price. All replaced parts and products, and products on which a refund is made, become the prop-
erty of RadioShack. New or reconditioned parts and products may be used in the performance of
warranty service. Repaired or replaced parts and products are warranted for the remainder of the
original warranty period. You will be charged for repair or replacement of the product made after the
expiration of the warranty period.
This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse,
accident, misuse, improper or abnormal usage, failure to follow instructions, improper installation or
maintenance, alteration, lightning or other incidence of excess voltage or current; (b) any repairs
other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as
fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs
of product removal, installation, set-up service adjustment or reinstallation.
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
RadioShack Customer Relations, 200 Taylor Street, 6th Floor, Fort Worth, TX 76102
12/99
We Service What We Sell
21-1705
AO0014ABA1
09A00
Printed in China
RadioShack Corporation
Fort Worth, Texas 76102
|