Optimus CTR-107 User Manual
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OWNER’S MANUAL
Please read before using this equipment.
CTR-107
Portable Cassette
Tape Recorder
Cat. No. 14 - 11 1 2
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FEATURES
Your Optimus CTR-107 Portable Cassette Tape Recorder has a lightweight, portable design that makes
it perfect for recording lectures, interviews, business
meetings, and speeches.
The recorder’s voice activation feature lets you set
the recorder to automat i cally record only when it picks
up sound. This saves room on your cassette tape,
conserves battery power, and lets you record without
manually stopping the recorder whenever a long
pause or break occurs.
The recorder also includes these features:
Built-In Condenser Microphone
— provides good
quality recordings.
Built-In Speaker
— lets you listen to your recordings
without connect ing an earphone.
Cue/Review
— lets you listen to recordings at a high
speed to help you find a particular section.
© 1997 Tandy Corporation.
All Rights Reserved.
Optimus is a registered trademark
used by Tandy Corporati on.
RadioShack is a trademark used by
Tandy Corporation.
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Tape Counter — helps you quickly locate a specific
section on the tape.
Automatic Level Control (ALC) Circuit — automatically adjusts to the proper recordin g level.
Auto Stop — automatically stops the recorder when
the tape reaches the end during playback or recording.
Pause Control — lets you edit as you record.
Three Power Sources — let you power the recorder
using four AA batteri es, a standard AC outlet (wit h an
optional AC adapter), or your vehicle’s cigarettelighter socket (with an optional DC adapter ).
Built-In Carrying Strap — lets you easily carry the
cassette recorder anywhere you go.
Supplied Earphone — lets you listen in privacy.
Erase Plug — lets you erase a tape without record-
ing any sound over it .
MIC Jack — lets you co nnect an opti ona l exter nal microphone.
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CONTENTS
Preparation ........................................................... 5
Connecting Power ........................................... 5
Using Internal Batteries ............................ 5
Using AC Power ....................................... 8
Using Vehicle Battery Power .................. 10
Using the Earphone ...................................... 12
Listening Safely ...................................... 12
Traffic Safety .......................................... 13
Operation .......... .................................................. 14
Loading a Cassette Tape .............................. 14
Playing a Cassett e Tape ............................... 16
Using Fast-Forward/Rewind ................... 18
Using the Tape Counter ......................... 19
Recor ding ......... .......... ............ ............ .......... . 20
Using an External Microphone ........... .... 22
Tape Tips ....................................................... 24
Recommended Tapes ...... ...................... 24
Erasing a Cassett e Tape ............ ............ 24
Preventing Acci dental Erasure ............... 25
Restoring Tape Tension and
Sound Quality ........................................ 27
Maint enan ce .... ..... ..... .. ..... ..... .. ..... ..... .. ..... ..... ..... . 28
Cleaning the Tape-Handling Parts ........... ..... 30
Speci fi ca t io n s ... ... .. ............................................ . 33
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PREPARATION
CONNECTING POWER
You can power the CTR-107 from any of three power
sources:
• Internal batteries
• Standard AC power (with an optional AC
adapter)
• Your vehicle’s cigarette-lighter socket (with an
optional DC adapter)
Note:
Connecting an adapter disconnects internal
batteries.
Using Internal Batteries
You can power the CTR-107 from four AA batteries
(not supplied). For the best performance, we recommend alkaline batteries, such as RadioShack Cat.
No. 23-557.
You can also use rechargeable nickel-cadmium batteries (Cat. No. 23-125) with a battery charger (Cat.
No. 23-133).
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Follow these steps to install batteries:
1. Press down on the battery compartment cover
and slide it off in the direction of the arr ows.
2. Install the batteries as indicated by the polarity
symbols (+ and –) marked outside the compartment.
Cautions:
• Use only fresh batteries of the required size
and type.
• Do not mix old and new batteries, different
types of batteries (standard, alkaline, or rechargeable), or rechargeable batteries of different capacities .
• Always dispose of old batteries promptly and
properly.
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• Never leave dead, ol d or weak batteries in the
CTR-107. Batteries can leak chemicals and
corrode or damage electronic circuits.
3. Replace the cover.
Notes:
• If you plan not to use the CTR-107 for a week or
more, or you plan to use an AC or DC adapter,
remove the batteries to protect the CTR-107
from possible battery leakage.
• When the RECORD/BATT indicator becomes
dim during operation or does not light when you
turn on the recorder, replace the batteries.
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Important: Your recorder is capable of using rechargeable nickel-cadmium batteries. At the end of
the batteries’ life, they must be recycled or disposed
of properly. Contact your local, county, or state hazardous waste manageme nt aut horities for infor ma ti on
on recycling or disposal programs i n your area. Some
options that might be available are: municipal curbside collection, drop-off boxes at retailers such as
your local RadioS hack store, recycling collection centers, and mail-back programs.
Using AC Power
To power the CTR-107 from an AC outlet, you need
an AC adapter (not supplied), such as Cat. No. 2731663 or 273-1664.
Cautions:
• The recommended AC adapter supplies 6 volts
and delivers at least 300 millliamps. Its center tip
is set to negative, and its plug correctly fits the
jack on the CTR-107. Using an adaper
DC 6V
that does not meet these specifications could
seriously damage the CTR-107 or the adapter.
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• Always plug the AC adapter into the CTR-107
before you plug it into the AC outlet, and unplug
the AC adapter from the AC outlet before you
unplug its barrel plug from the CTR-107.
Follow these steps to connect the CTR-107 to AC
power.
1. Set the adapter’s volt age switch to 6V.
2. Insert the adapter’s 5.5 mm outer diameter/2.1
mm inner diameter barrel plug into the adapter’s
cord so it reads –TIP.
3. Insert th e AC adapter’s barrel plug into the
DC 6V
jack on the CTR-107.
4. Plug the AC adapter into a sta ndard AC outlet.
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Using Vehicle Battery Power
You can power the CTR-107 from your vehicle’s cigarette-lighter socket using a DC adapter (not supplied),
such as Cat. No. 273-180 2.
Cautions:
• The recommended DC adapter supplies 6 volts
and delivers at least 300 milliamps. Its center tip
is set to negative, and its plug correctly fits the
CTR-107’s
does not meet these specifications could damage the CTR-107 or the adapter.
• Always plug the DC adapter into the CTR-107
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-107.
DC 6V
jack. Using an adapter that
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Follow these steps to connect the CTR-107 to vehi cle
battery power.
1. Set the DC adapter’s voltag e switch to 6V.
2. Insert the adapter’s barrel plug into the CTR-
DC 6V
107’s
jack.
3. Plug the adapter’s larger plug into the vehicle’s
cigarette-lighter socket.
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