14-1115.fm Page 1 Friday, January 8, 1999 10:31 AM
Cat. No. 14-1115
A
OWNER’S MANUAL
Please read before using this equipment.
CTR-108
AC•DC Portable
Cassette Recorder
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CONTENTS
Preparation............................................................................................................. 4
Connecting Power............................................................................................. 4
Using Internal Batteries.............................................................................. 4
Using AC Power.......................................................................................... 5
Using Vehicle Battery Power....................................................................... 5
Using an Earphone ........................................................................................... 6
Listening Safely .......................................................................................... 6
Traffic Safety............................................................................................... 6
Operation................................................................................................................ 7
Loading a Cassette Tape .................................................................................. 7
Playing a Cassette Tape.................................................................................... 7
Recording.......................................................................................................... 8
Using the Built-In Microphone .................................................................... 8
Using an External Microphone ................................................................... 8
Recording from a Connected Audio Source ............................................... 9
Tape Tips......................................................................................................... 10
Recommended Tapes............................................................................... 10
Erasing a Cassette Tape........................................................................... 10
Preventing Accidental Erasure ................................................................. 10
Restoring Tape Tension and Sound Quality.............................................. 11
Maintenance......................................................................................................... 12
Cleaning the Tape-Handling Parts .................................................................. 13
Specifications ...................................................................................................... 14
3
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PREPARATION
2. Install the batteries as indicated
by the polarity symbols (+ and –)
marked inside the compartment.
CONNECTING POWER
You can power the CTR-108 from any
of three power sources:
Cautions:
• Internal batteries
• Use only fresh batteries of the
required size and recom-
mended type.
• Standard AC power (with the sup-
plied power cord)
• Do not mix old and new batter-
ies, different types of batteries
(standard, alkaline, or re-
chargeable), or rechargeable
batteries of different capacities.
• Your vehicle’s cigarette-lighter
socket (with an optional DC
adapter)
Note: Connecting an AC power cord or
a DC adapter disconnects the internal
batteries.
3. Replace the cover.
When the RECORD indicator be-
comes dim, replace the batteries.
Using Internal Batteries
Cautions:
You can power the CTR-108 from four
C batteries (not supplied). For the best
performance, we recommend alkaline
batteries, such as RadioShack Cat.
No. 23-551/651.
• Always dispose of old batteries
promptly and properly.
• Never leave dead, old, or weak
batteries in the CTR-108. They
can leak chemicals and corrode or
damage electronic circuits.
• If you do not plan to use the CTR-
108 for a week or more, or if you
plan to use an adapter only,
remove the batteries to protect the
CTR-108 from possible battery
leakage.
{
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{
{
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1. Press down on the battery com-
partment cover and slide it off in
the direction of the arrow.
4
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Cautions:
Using AC Power
• You must use a DC adapter that
supplies 6 volts and delivers at
least 300 milliamps. Its center tip
must be set to negative, and its
plug must correctly fit the CTR-
108’s DC IN 6V jack. The recom-
mended adapter meets these
specifications. Using an adapter
that does not could damage the
CTR-108 or the adapter.
To power the CTR-108 from standard
AC power, plug the supplied power
cord into the AC IN jack on the side of
the CTR-108. Then plug the other end
into a standard AC outlet.
O
P
T I
M
U
S
CTR-108 CASSETTE RECORDER
AC/DC/BATTERY
• Always plug the adapter into the
CTR-108 before you plug it into
the cigarette-lighter socket, and
always unplug the adapter from
the cigarette-lighter socket before
you unplug it from the CTR-108.
Cautions:
• Always plug the power cord into
the AC IN jack before you plug it
into the AC outlet, and always
unplug the power cord from the
AC outlet before you unplug it
from the AC IN jack.
DC IN 6V
AUX
EAR
REM MIC
VOLUME
• The power cord has a polarized
plug that is designed to fit into the
recorder’s jack only one way. If the
plug does not easily fit into the
jack, do not force it. Simply turn it
over and try again.
Using Vehicle Battery Power
1. Set the DC adapter’s voltage
switch to 6V.
You can power the CTR-108 from your
vehicle’s cigarette-lighter socket using
a DC adapter, such as Cat. No. 273-
1802 (not supplied).
2. Insert the adapter’s barrel plug
into the CTR-108’s DC IN 6V jack.
3. Insert the adapter’s larger plug
into the vehicle’s cigarette-lighter
socket.
5
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Traffic Safety
USING AN EARPHONE
Do not wear an earphone while operat-
ing a motor vehicle or riding a bicycle.
This can create a traffic hazard and
can be illegal in some areas.
For private listening, insert the sup-
plied earphone’s /8-inch plug into the
EAR jack.
1
DC IN 6V
AUX
EAR
REM MIC
VOLUME
Even though some earphones let you
hear some outside sounds when lis-
tening at normal volume levels, they
still can present a traffic hazard.
Note: Connecting the earphone auto-
matically disconnects the built-in
speaker.
Listening Safely
To protect your hearing, follow these
guidelines when you use the ear-
phone.
• Set the volume to the lowest set-
ting before you begin listening.
After you begin listening, adjust
the volume to a comfortable level.
• Do not listen at extremely high vol-
ume levels. Extended high volume
listening can lead to permanent
hearing loss.
• Once you set the volume, do not
increase it. Over time, your ears
adapt to the volume level, so a vol-
ume level that does not cause dis-
comfort might still damage your
hearing.
6
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OPERATION
LOADING A CASSETTE
TAPE
PLAYING A CASSETTE
TAPE
1. Take up any slack in the tape by
turning one of the cassette’s hubs
with a pencil.
1. Load the cassette tape.
2. Press PLAY. The cassette plays
until it reaches the end of the side,
then it automatically stops.
MIC
FAST-F
Caution: If you do not remove the
excess slack, the tape could
become tangled in the record/
playback mechanism.
Notes:
• Press PAUSE to temporarily
stop playback. Press PAUSE
again to resume playback.
2. Press STOP/EJECT to open the
• To rapidly wind the tape forward
or backward, press STOP/
EJECT, then FAST-F or REWIND.
Press PLAY to resume play-
back.
cassette compartment door.
MIC
FAST-F
3. Adjust VOLUME as desired.
3. Load the cassette in the slot in the
door with its open edge out, the
side you want to play facing up,
and its full reel to the left.
4. Press STOP/EJECT to completely
stop playback before it automati-
cally stops. Press STOP/EJECT
again to open the cassette com-
partment and remove the cassette
tape.
4. Close the door.
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14-1115.fm Page 8 Friday, January 8, 1999 10:31 AM
4. Speak into MIC.
RECORDING
Notes:
MIC
• Before you load a cassette tape
for recording, be sure its erase-
protection tabs are in place (see
“Preventing Accidental Erasure”
on Page 10).
FAST-F
5. Press STOP/EJECT to stop record-
ing.
• The recorder’s Automatic Level
Control (ALC) circuit automatically
adjusts the recording level. VOL-
UME has no effect on recording.
Using an External
Microphone
You can connect an external micro-
phone (not supplied) with a 1/8-inch
plug to the CTR-108. Your local
RadioShack store sells a variety of mi-
crophones.
Using the Built-In Microphone
1. Load a blank cassette tape, or one
you want to record over, into the
cassette compartment.
Note: Connecting an external micro-
phone automatically disconnects the
built-in microphone.
2. Place the CTR-108 2 to 3 feet
from the recording source.
3. Press RECORD to begin record-
ing. Both PLAY and RECORD lock
down.
Follow these steps to record using an
external microphone.
1. Load a blank cassette tape, or one
you want to record over, into the
cassette compartment.
MIC
FAST-F
2. Insert the microphone’s plug into
the CTR-108’s MIC jack.
Note: To temporarily stop record-
ing, press PAUSE. Press PAUSE
again to resume recording.
DC IN 6V
AUX
EAR
REM
VOLUME
MIC
8
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14-1115.fm Page 9 Friday, January 8, 1999 10:31 AM
Note: If the external microphone
has a separate, smaller plug for
remote operation, insert that plug
into the REM jack. Then you can
use the microphone’s remote
switch to stop or start recording.
Note: If you connected an external mi-
crophone, disconnect it.
1. Load a blank cassette tape, or one
you want to record over, into the
cassette compartment.
2. Connect the external source to the
3. Press RECORD to begin record-
ing. Both PLAY and RECORD lock
down.
AUX jack.
DC IN 6V
AUX
EAR
REM
VOLUME
MIC
Note: To temporarily stop record-
ing, press PAUSE. Press PAUSE
again to resume recording.
4. Speak into the external micro-
phone.
External
source
5. Press STOP/EJECT to stop record-
ing.
3. Start the external audio source
and set its volume control to a nor-
mal listening level.
Recording from a Connected
Audio Source
4. Press RECORD to begin record-
ing. Both PLAY and RECORD lock
down.
You can record directly from an exter-
nal audio source, such as a radio, tape
deck, or CD player. To make the con-
nection, you need a suitable mono
patch cord with a /8-inch plug (avail-
able from your local RadioShack
store).
Note: To temporarily stop record-
ing, press PAUSE. To resume
recording, press PAUSE again.
1
5. Press STOP/EJECT to stop record-
ing. Then stop the audio source.
Note: During recording, the speaker is
muted. If you want to monitor the re-
cording, use the supplied earphone.
Note: Before you connect an external
audio source to the recorder, be sure
the source’s and the recorder’s volume
controls are set to their minimum set-
tings.
Follow these steps to record from an
external audio source.
9
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14-1115.fm Page 10 Friday, January 8, 1999 10:31 AM
Preventing Accidental
Erasure
TAPE TIPS
Recommended Tapes
Cassette tapes have two erase-protec-
tion tabs — one for each side. When a
tab is in place, you can record on that
side.
Tape quality greatly affects the quality
of the recording. We recommend ex-
tended-range or low noise Type 1 reg-
ular length (60- or 90-minute) normal-
bias cassette tapes. We do not recom-
mend long-play cassette tapes such as
C-120s because they are thin and can
easily tangle.
To protect a recording from being acci-
dentally recorded over or erased, use
a screwdriver to remove one or both of
the cassette tape’s erase-protection
tabs. This prevents RECORD from be-
ing pressed.
Erasing a Cassette Tape
Side A Tab
To record over a cassette tape, simply
record as usual. The cassette deck
records over the previous recording.
A
To erase the entire cassette tape, in-
sert the supplied erasing plug into the
MIC jack and press RECORD. (Be sure
you have not connected anything to
the AUX jack.)
If you later decide to record on a tape
side after you have removed its erase-
protection tab, place a piece of strong
plastic tape over that side’s erase-pro-
tection hole. Be sure you cover only
the hole originally covered by the
erase-protection tab.
DC IN 6V
AUX
EAR
REM
VOLUME
MIC
A
If you need to erase an entire cassette,
you might prefer using a bulk tape
eraser, available at your local
RadioShack store.
Caution: Removing the erase-protec-
tion tabs does not prevent a bulk eras-
er from erasing a cassette tape.
10
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Restoring Tape Tension and
Sound Quality
After you play a cassette tape several
times, the tape might become tightly
wound on the reels. This can cause
playback sound quality to deteriorate.
To restore the sound quality, fast-
forward the tape from the beginning to
the end of one side, then completely
rewind it. Then loosen the tape reels
by gently tapping each side of the cas-
sette’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.
11
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MAINTENANCE
•
Your RadioShack CTR-108 AC DC Portable Cassette Recorder is an example of
superior design and craftsmanship. The following suggestions will help you care for
your CTR-108 so you can enjoy it for years.
Keep the CTR-108 dry. If it gets wet, wipe it dry immediately. Liquids
might contain minerals that can corrode the electronic circuits.
Handle the CTR-108 gently and carefully. Dropping it can damage
circuit boards and cases and can cause the CTR-108 to work improp-
erly.
Use and store the CTR-108 only in normal temperature environ-
ments. Temperature extremes can shorten the life of electronic de-
vices and distort or melt plastic parts.
Keep the CTR-108 away from dust and dirt, which can cause prema-
ture wear of parts.
Wipe the CTR-108 with a damp cloth occasionally to keep it looking
new. Do not use harsh chemicals, cleaning solvents, or strong deter-
gents to clean the CTR-108.
Modifying or tampering with the CTR-108’s internal components can cause a mal-
function and might invalidate your CTR-108’s warranty. If your CTR-108 is not per-
forming as it should, take it to your local RadioShack store for assistance.
12
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14-1115.fm Page 13 Friday, January 8, 1999 10:31 AM
4. Gently clean the capstan, pinch
roller, tape guides, and record/
play head.
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 cause noise and
poor high-frequency response which
can greatly reduce the cassette play-
er’s performance.
Tape Guides
Capstan
Pinch Roller
Tape Head
Cotton Swab
To help keep the cassette player work-
ing at its best, clean the cassette play-
er’s tape-handling parts after every 20
hours of use using a tape cleaning kit,
such as Cat. No. 44-1115, not sup-
plied.
5. When you finish cleaning, press
STOP and close the compartment
door. Then reconnect power.
1. Remove the batteries and discon-
nect any other power source.
2. Open the cassette compartment
cover.
3. Press the erase-protection tab
sensor, then press RECORD to
expose the tape-handling parts.
13
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SPECIFICATIONS
CASSETTE PLAYER
Track System .................................................................................2-Track Monaural
Tape Speed ...............................................................................................4.75 cm/s
Recording System ........................................................................................AC Bias
Frequency Response (@ ±6 dB) ....................................................125 Hz– 6.3 kHz
Signal-to-Noise Ratio ...................................................................................... 40dB
Wow and Flutter (WRMS) ............................................................ Less Than 0.35%
GENERAL
Power Requirements ................................................................. Four C Batteries, or
AC 120V, 60 Hz, or
DC 6V with Optional Adapter (Cat. No. 273-1802)
Dimensions (HWD) ...............................................................95/8 × 51/2 × 17/8 Inches
(246 × 141 × 47 mm)
Weight (without batteries) ............................................................................1.11 lbs
(0.503 kg)
Included Accessories ............................................................................. Erase Plug
Earphone
AC Power Cord
Specifications are typical; individual units might vary. Specifications are subject to
change without notice.
14
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NOTES
15
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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
C2131-920-0-05
Printed in China
02A99
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