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Cat. No. 14-733
OWNER’S MANUAL
Please read before using this equipment.
CTR-110
Extended Bass AM/FM
Cassette Recorder
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CONTENTS
Preparation ..................................................................................................... 4
Power Sources .......................................................................................... 4
Using Batteries .................................................................................... 4
Using AC Power .................................................................................. 5
Using Vehicle Power ........................................................................... 5
Using Earphones ....................................................................................... 6
Listening Safely ................................................................................... 6
Traffic Safety ....................................................................................... 7
Radio Operation ............................................................................................. 8
Cassette Player Operation ............................................................................. 9
Loading a Cassette Tape ........................................................................... 9
Playing a Cassette Tape ............................................................................ 9
Recording ................................................................................................ 10
Recording from the Radio ................................................................. 10
Making Live Recordings .................................................................... 10
Tape Tips ................................................................................................. 11
Recommended Tapes ....................................................................... 11
Recording Over or Erasing a Cassette Tape ..................................... 11
Preventing Accidental Erasure .......................................................... 11
Restoring Tape Tension and Sound Quality ...................................... 12
Care and Maintenance ................................................................................. 13
Cleaning the Tape Handling Parts ........................................................... 14
The FCC Wants You to Know .................................................................. 14
Specifications ............................................................................................... 15
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PREPARATION
2. Put four C batteries in the com-
partment, as indicated by the
polarity symbols (+ and –)
marked inside.
POWER SOURCES
You can operate the CTR-110 using:
• Internal battery power (using
four C batteries)
• AC power (using an optional AC
adapter)
Illustration
• Vehicle battery power (using an
optional DC adapter)
Cautions:
Note: Internal batteries automatically
disconnect when you connect an
adapter.
• Use only fresh batteries of the
required size and recom-
mended type.
Using Batteries
• Do not mix old and new bat-
teries, different types of bat-
teries (standard, alkaline, or
rechargeable), or recharge-
able batteries of different
capacities.
You can power the CTR-110 from
four C batteries (not supplied). For
the best performance and longest
life, we recommend alkaline batter-
ies, such as RadioShack Cat. No. 23-
551.
3. Replace the cover and snap it
shut.
1. Turn the CTR-110 on its face,
pull the tabs on the battery com-
partment’s cover and remove
the cover.
If the CTR-110 does not operate
properly or if the sound weakens or
distorts, replace the batteries.
Cautions:
Illustration
• Dispose of the old batteries
promptly and properly. Do not
bury or burn them.
• Never leave dead, old, or weak
batteries in the CTR-110. Batter-
ies can leak chemicals that can
destroy electronic parts.
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• If you do not plan to use the
CTR-110 from battery power for
a month or more, or if you plan
to use only an adapter, remove
the batteries to protect the CTR-
110 from possible battery leak-
age.
2. Insert the AC adapter’s 5.5 mm
outer diameter/2.1 mm inner
diameter barrel plug into the
adapter cord’s small end so it
reads –TIP, then insert the
adapter’s plug into the DC 6V
jack on the back of the CTR-110.
Using AC Power
Illustration
You can power the CTR-110 from
standard AC power using an optional
AC adapter, such as RadioShack
Cat. No. 273-1663.
3. Plug the adapter into a standard
AC outlet.
Cautions:
• The recommended AC adapter
supplies 6 volts and delivers at
least 400 milliamps. Its center tip
is set to negative, and its plug
correctly fits the CTR-110’s DC
6V jack. Using an AC adapter
that does not meet these specifi-
cations could damage the CTR-
110 or the adapter.
Using Vehicle Power
You can power the CTR-110 from
your vehicle’s battery using an op-
tional DC adapter, such as Ra-
dioShack Cat. No. 273-1802.
Cautions:
• The recommended DC adapter
supplies 6 volts and delivers at
least 400 milliamps. Its center tip
is set to negative, and its plug
correctly fits the CTR-110’s DC
6V jack. Using a DC adapter that
does not meet these specifica-
tions could damage the CTR-
110 or the adapter.
• Always plug the adapter into the
CTR-110 before you plug it into
the AC outlet, and always
unplug the adapter from the AC
outlet before you unplug it from
the CTR-110.
1. Set the AC adapter’s voltage
switch to 6V.
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1
• Always plug the adapter into the
CTR-110 before you plug it into
the cigarette-lighter socket, and
always unplug the adapter from
Insert the earphones’ /8-inch plug
into the PHONE jack on the top of the
CTR-110.
the
cigarette-lighter
socket
Illustration
before you unplug it from the
CTR-110.
Follow these steps to use your vehi-
cle’s battery.
: Connecting earphones auto-
Note
matically disconnects the built-in
speaker.
Illustration
Listening Safely
To protect your hearing, follow these
guidelines when you use earphones.
1. Set the DC adapter’s voltage
switch to 6V.
• Set the volume to the lowest set-
ting before you begin listening.
After you begin listening, adjust
the volume to a comfortable
level.
2. Insert the DC adapter’s barrel
plug into the CTR-110’s DC 6V
jack.
3. Insert the other end of the
adapter into your vehicle’s
cigarette-lighter socket.
• Do not listen at extremely high
volume levels. Extended high-
volume listening can lead to per-
manent hearing loss.
USING EARPHONES
• Once you set the volume, do not
increase it. Over time, your ears
adapt to the volume level, so a
volume level that does not
cause discomfort might still
damage your hearing.
For private listening, you can con-
nect a pair of earphones (not sup-
1
plied) with a /8-inch plug. Your local
RadioShack store carries a wide se-
lection of earphones.
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Traffic Safety
Do not wear earphones while operat-
ing a motor vehicle or riding a bicy-
cle. This can create a traffic hazard
and could be illegal in some areas.
Even though some earphones are
designed to let you hear some out-
side sounds when listening at normal
volume levels, they still can present a
traffic hazard.
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RADIO OPERATION
1. Set FUNCTION to RADIO to turn
4. Adjust VOLUME MIN/MAX to a
on the radio.
comfortable listening level.
Illustration
Illustration
2. Set BAND to AM or FM.
5. Set E-BASS ON/OFF to ON to
boost low frequency sounds. Set
it to OFF for normal bass sound.
Illustration
Illustration
3. Rotate the tuning control to
select the desired station.
6. Set FUNCTION to TAPE to turn
off the radio.
Illustration
Illustration
Notes:
• The AM antenna is built-in. To
improve AM reception, reposi-
tion the CTR-110.
• For the best FM reception,
fully extend the telescoping
antenna and swivel it to the
position that produces the
best reception.
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CASSETTE PLAYER OPERATION
4. Gently close the compartment’s
LOADING A CASSETTE
TAPE
door.
1. Take up any slack in the tape by
turning the cassette’s hub with a
pencil. If you do not remove
excess slack, the tape could
become tangled in the record/
playback mechanism.
PLAYING A CASSETTE
TAPE
1. Set FUNCTION to TAPE.
2. With a cassette loaded in the
compartment, press PLAY.
Illustration
Illustration
2. Press STOP/EJECT to open the
Notes:
cassette compartment’s door.
• Press PAUSE to temporarily
stop playback. Press PAUSE
again to resume playback.
Illustration
Illustration
3. Load the cassette with its open
edge facing up, its full reel to the
right, and the desired side
toward you.
• Press FAST-F
to fast-for-
to
ward, or REWIND
rewind the tape to the desired
location.
Illustration
Illustration
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3. Adjust VOLUME MIN/MAX to a
Recording from the Radio
comfortable listening level.
1. Load a blank cassette tape, or
one you want to record over, into
the cassette compartment.
4. Set E-BASS ON/OFF to ON to
boost low frequency sounds. Set
it to OFF for normal bass sound.
2. Set FUNCTION to RADIO.
5. Press STOP/EJECT to stop play-
back before it automatically
stops. Press STOP/EJECT again
to open the cassette compart-
ment and remove the cassette
tape.
3. Set BAND to AM or FM.
4. Adjust TUNING to the station you
want to record.
5. Press RECORD to begin record-
ing. PLAY and RECORD lock
down.
RECORDING
You can record from the radio or use
the built-in microphone to make a live
recording.
Illustration
: Before you load a cassette
Caution
:
To temporarily stop
Note
tape for recording, be sure its erase-
protection tabs are in place. If you
force down RECORD when a tape
side’s erase-protection tab is miss-
ing, you will damage the record
mechanism (see “Preventing Acci-
dental Erasure” on Page 11).
recording, press PAUSE. To
resume recording, press PAUSE
again.
6. Press STOP/EJECT to stop
recording.
Making Live Recordings
:
Notes
• The CTR-110’s Automatic Level
Control (ALC) automatically
adjusts the recording level. VOL-
UME MIN/MAX has no effect on
recording.
Follow these steps to make live re-
cordings using the built-in micro-
phone.
1. Load a blank cassette tape, or
one you want to record over, into
the cassette compartment.
• To record on the other side of
the tape, you must turn it over.
2. Set FUNCTION to TAPE.
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3. Place the CTR-110 1–2 feet
from the recording source.
Preventing Accidental
Erasure
4. Press RECORD to begin record-
ing. PLAY and RECORD lock
down.
Cassette tapes have two erase-
protection tabs, one for each side.
When a tab is in place, you can
record on that side.
:
To temporarily stop
Note
recording, press PAUSE. To
resume recording, press PAUSE
again.
To protect a recording from being ac-
cidentally recorded over or erased,
use a screwdriver to remove one or
both of the cassette tape’s erase-
protection tabs. This prevents
RECORD from being pressed.
5. Press STOP/EJECT to stop
recording.
TAPE TIPS
Illustration
Recommended Tapes
Tape quality greatly affects the qual-
ity of the recording. We recommend
extended-range or low noise type 1
regular length (60 or 90-minute)
normal-bias cassette tapes. We do
not recommend long-play cassette
tapes such as C-120s because they
are thin and can easily tangle.
If you later decide to record on a tape
side after you have removed the
erase-protection tab, place a piece of
strong plastic tape over that side’s
erase-protection hole. Be sure you
cover only the hole originally covered
by the erase-protection tab.
Recording Over or Erasing a
Cassette Tape
To record over a cassette tape, sim-
ply record as usual. The cassette
deck records over the previous re-
cording.
Illustration
You can quickly erase both sides of a
cassette tape using a bulk tape eras-
er available at your local RadioShack
store.
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Caution: Removing the erase-
protection tabs does not prevent a
bulk eraser from erasing a cassette
tape.
Restoring Tape Tension and
Sound Quality
After you play a cassette tape sever-
al times, the tape might become
tightly wound on the reels. This can
cause playback sound quality to de-
teriorate.
To restore the sound quality, fast-
forward the tape from the beginning
to the end of one side, then com-
pletely rewind it. Then loosen the
tape reels by gently tapping each
side of the cassette’s outer shell on a
flat surface.
Caution: Be careful not to damage
the cassette when tapping it. Do not
touch the exposed tape or allow any
sharp objects near the cassette.
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CARE AND MAINTENANCE
Your Optimus CTR-110 Extended Bass AM/FM Cassette Recorder is an exam-
ple of superior design and craftsmanship. The following suggestions will help you
care for your CTR-110 so you can enjoy it for years.
Keep the CTR-110 dry. If it gets wet, wipe it dry immediately. Liq-
uids might contain minerals that can corrode the electronic cir-
cuits.
Use and store the CTR-110 only in normal temperature environ-
ments. Temperature extremes can shorten the life of electronic
devices, damage batteries, and distort or melt plastic parts.
Keep the CTR-110 away from dust and dirt, which can cause pre-
mature wear of parts.
Handle the CTR-110 gently and carefully. Dropping it can damage
circuit boards and cases and can cause the CTR-110 to work im-
properly.
Use only fresh batteries of the required size and type. Batteries
can leak chemicals that damage your CTR-110’s electronic parts.
Wipe the CTR-110 with a damp cloth occasionally to keep it look-
ing new. Do not use harsh chemicals, cleaning solvents, or strong
detergents to clean the CTR-110.
Modifying or tampering with the CTR-110’s internal components can cause a
malfunction, invalidate your CTR-110’s warranty, and void your FCC authoriza-
tion to operate it. If your CTR-110 is not performing as it should, take it to your
local RadioShack store for assistance.
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clean the capstan, pinch rollers,
tape guides, and tape heads.
CLEANING THE TAPE
HANDLING PARTS
Dirt, dust, or particles of the tape’s
coating can accumulate on the tape
heads and other parts that the tape
touches. This can greatly reduce the
cassette player’s performance. To
prevent noise and poor high-
frequency response, clean the cas-
sette player’s tape handling parts af-
ter every 20 hours of use. Your local
RadioShack store sells a complete
line of cassette deck cleaning sup-
plies.
Illustration
STOP/EJECT
6. Press
and close
the cassette compartment’s
cover. Then reconnect power.
THE FCC WANTS YOU
TO KNOW
FUNCTION
TAPE
.
1. Set
to
2. Remove the batteries and dis-
connect any other power source.
Your CTR-110 might cause TV or ra-
dio interference even when it is oper-
ating properly. To determine whether
your CTR-110 is causing the interfer-
ence, turn off your CTR-110. If the in-
terference goes away, your CTR-110
is causing it. Try to eliminate the in-
terference by:
STOP/EJECT
3. Press
to open the
cassette compartment’s cover.
4. Hold down the erase-protection
RECORD
tab sensor, then press
to expose the tape handling
parts.
• Moving your CTR-110 away
from the receiver
Illustration
• Connecting your CTR-110 to an
outlet that is on a different elec-
trical circuit from the receiver
• Contacting your local Ra-
dioShack store for help
If you cannot eliminate the interfer-
ence, the FCC requires that you stop
using your CTR-110.
5. Use a cotton swab dipped in
tape head cleaning solution or
denatured alcohol to gently
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SPECIFICATIONS
RADIO
Frequency Range:
FM............................................................................................. 88–108 MHz
AM ........................................................................................ 530–1710 kHz
Antenna:
FM ............................................................................... Telescoping Antenna
AM ............................................................................................. Ferrite Rod
CASSETTE PLAYER
Track System ................................................................................ 2 Track Mono
Tape Speed ............................................................................... 17/8 inch/second
Recording System ........................................................ DC Bias, Magnet Erase
Frequency Response (Play) at ±6 dB ........................................... 125–6300 Hz
Frequency Response (Record/Play) at ±6 dB................................ 125–4000 Hz
Wow and Flutter .......................................................................... 0.3% (WRMS)
GENERAL
Power Requirements ....................................................... DC 6V (4 C Batteries)
Power Consumption .................................................................................. 0.7 W
Dimensions .......................................................... 55/16 × 11 × 33/4 Inches (HWD)
(135 x 280 x 95 mm)
Weight ..................................................................................................... 38.8 oz
(1.1 Kg)
Specifications are typical; individual units might vary. Specifications are subject
to change and improvement without notice.
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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 the limitations on how long an implied warranty lasts or the exclusion of in-
cidental 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, Dept. W, 100 Throckmorton St., Suite 600, Fort Worth, TX 76102
We Service What We Sell
3/97
RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
12A7
Printed in Hong Kong
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