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Cat. No. 14-1107A
OWNER’S MANUAL
Please read before using this equipment.
CTR-94
DC Portable Cassette Tape Recorder
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CONTENTS
Preparation .......................................................................................................4
Connecting Power .......................................................................................4
Using Internal Batteries.........................................................................4
Checking the Battery Condition.............................................................5
Using AC Power....................................................................................5
Using Vehicle Battery Power.................................................................6
Connecting an Earphone.............................................................................7
Listening Safely..................................................................................... 7
Traffic Safety .........................................................................................7
Operation ..........................................................................................................8
Loading a Cassette......................................................................................8
Playing a Tape .............................................................................................8
Recording ....................................................................................................9
Using the Built-In Microphone ...............................................................9
Using an External Microphone ..............................................................9
Recording from an External Audio Source..........................................10
Tape Tips ................................................................................................... 11
Recommended Tapes ......................................................................... 11
Erasing a Cassette Tape ..................................................................... 11
Preventing Accidental Erasure............................................................12
Restoring Tape Tension and Sound Quality ........................................12
Maintenance.................................................................................................... 13
Cleaning the Tape-Handling Parts.............................................................14
Specifications.................................................................................................15
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PREPARATION
Cautions:
CONNECTING POWER
• Always dispose of old batter-
ies promptly and properly.
You can power your CTR-94 from
any of these power sources:
• Never leave dead, old, or
weak batteries in the CTR-94.
Batteries can leak chemicals
and corrode or damage elec-
tronic circuits.
• Internal batteries
• Standard AC power (with an
optional AC adapter)
• Vehicle battery power (with an
optional DC auto adapter)
• If you do not plan to use bat-
teries in the CTR-94 for a
month or more, remove the
batteries to protect the CTR-
94 from possible battery leak-
age.
Note: Connecting an adapter discon-
nects the internal batteries.
Using Internal Batteries
3. Install the batteries as indicated
by the polarity symbols (+ and –)
marked inside the battery com-
partment.
You can power your CTR-94 from
four C batteries (not supplied). For
the best performance, we recom-
mend alkaline batteries, such as Cat.
No. 23-551.
Cautions:
• Use only fresh batteries of the
required size and type.
1. Press down on the battery com-
partment cover’s grooves and
slide it off in the direction of the
arrow.
• Never mix fresh and old bat-
teries, or different battery
types.
4. Replace the cover.
2. Remove the old batteries (if nec-
essary).
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• Always plug the adapter into the
CTR-94 before you plug it into
the AC outlet, and always
unplug the adapter from the AC
outlet before you unplug it from
the CTR-94.
Checking the Battery
Condition
To check the battery’s condition,
press PLAY, REWIND, or FAST-F. If
the RECORD/BATTERY indicator
lights steadily, the batteries need re-
placing.
Note: The recorder automatically
disconnects internal batteries when
you connect an AC adapter.
1. Set the adapter’s voltage switch
to 6V.
(illus)
(illus)
Using AC Power
2. Insert the adapter’s green-tipped
barrel plug into the adapter’s
cord so it reads TIP-NEG.
You can also power the CTR-94 from
standard AC power using an AC
adapter, such as Radio Shack Cat.
No. 273-1662 (not supplied).
(illus)
Cautions:
3. Plug the adapter’s barrel plug
into the DC 6V jack on the left
side of the CTR-94.
• The recommended adapter sup-
plies 6 volts and delivers at least
300 milliamps. Its center tip is
set to negative, and its plug cor-
rectly fits the CTR-94’s DC 6V
jack. Using an adapter that does
not meet these specifications
could seriously damage the
CTR-94 or the adapter.
EAR AUX REM
MIC
MIN – VOLUME – MAX
+
DC 6V
-
4. Plug the other end of the
adapter into a standard AC out-
let.
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2. Insert the DC adapter’s black-
tipped barrel plug into the
adapter’s cord so it reads TIP-
NEG.
Using Vehicle Battery Power
You can also power the CTR-94 from
your vehicle’s battery using an auto
DC adapter (such as Radio Shack
Cat. No. 14-844, not supplied) that
connects to your vehicle’s cigarette-
lighter socket.
(illus)
Cautions:
3. Insert the adapter’s barrel plug
into the CTR-94’s DC 6V jack.
• 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 recorder’s DC
6V jack. Using an adapter that
does not meet these specifica-
tions could seriously damage
the recorder or the adapter.
EAR AUX REM MIC
MIN – VOLUME – MAX
DC 6V
+
-
• Always plug the adapter into the
recorder 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
recorder.
1. Set the DC adapter’s voltage
switch to 6V.
4. Plug the adapter’s larger plug
into the vehicle’s cigarette lighter
socket.
(illus)
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Listening Safely
CONNECTING AN
EARPHONE
To protect your hearing, follow these
guidelines when you use an ear-
phone.
For private listening, you can use the
supplied earphone. Insert the ear-
1
EAR
phone’s /8-inch plug into the
jack.
• Do not listen at extremely high
volume levels. Extended high
volume listening can lead to per-
manent hearing loss.
• Set the volume to the lowest set-
ting before you begin listening.
After you begin listening, adjust
the volume to a comfortable
level.
EAR AUX REM MIC
MIN – VOLUME – MAX
• 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.
Note: Connecting the earphone au-
tomatically disconnects the built-in
speaker.
Traffic Safety
Do not wear an earphone while oper-
ating a motor vehicle or riding a bicy-
cle. This can create a traffic hazard
and is 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 present a
traffic hazard.
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OPERATION
LOADING A CASSETTE
PLAYING A TAPE
1. Take up any slack in the tape by
turning one of the cassette’s
hubs with a pencil.
Warning: To protect your hearing, set
VOLUME to its lowest setting before
you begin playing a cassette tape.
EAR AUX REM MIC
MIN – VOLUME – MAX
(illus)
1. Load a prerecorded cassette
tape into the compartment.
Caution: If you do not remove
excess slack, the tape might get
tangled in the record/playback
mechanism.
2. Press PLAY. The cassette plays
until it reaches the end of the
side, then it automatically stops
and PLAY releases.
2. Press STOP/EJECT to open the
cassette compartment door.
MIC
CTR-94 AC/BATTERY CASSETTE RECORDER
MIC
STOP
EJECT
RECORD
PLAY
REWIND
FAST-F
PAUSE
CTR-94 AC/BATTERY CASSETTE RECORDER
STOP
EJECT
RECORD
PLAY
REWIND
FAST-F
PAUSE
Notes:
3. Load the cassette with its open
edge toward the controls, the
desired side facing up, and its
full reel on the left.
• Press PAUSE to temporarily
stop playback. To resume
playback, press PAUSE again.
• Press FAST-F or REWIND to
rapidly wind the tape forward
or backward. To resume play,
press STOP/EJECT then PLAY.
(illus)
• The cassette automatically
stops when the tape reaches
the end only in the PLAY or
RECORD modes, and not in
the
FAST-F
modes.
or REWIND
4. Close the door.
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3. Adjust VOLUME to the desired
3. Press RECORD to begin record-
ing. Both PLAY and RECORD
lock down.
listening level.
4. Press STOP/EJECT to com-
pletely stop playback before it
CTR-94 AC/BATTERY CASSETTE RECORDER
MIC
STOP
EJECT
automatically
STOP/EJECT again to open the
cassette compartment and
stops.
Press
RECORD
PLAY
REWIND
FAST-F
PAUSE
remove the cassette.
4. Speak into MIC.
RECORDING
MIC
CTR-94 AC/BATTERY CASSETTE RECORDER
STOP
PAUSE
Notes:
RECORD
PLAY
REWIND
FAST-F
EJECT
• Before you load a cassette tape
for recording, be sure the cas-
sette’s erase-protection tabs are
in place (see “Preventing Acci-
dental Erasure”).
To temporarily stop record-
ing, press PAUSE. To resume
recording, press PAUSE again.
Note:
• The CTR-94’s Automatic Level
Control (ALC) circuit automati-
cally adjusts the recording level.
VOLUME has no effect on
recording.
5. Press STOP/EJECT to stop
recording.
Using an External
Microphone
Using the Built-In
Microphone
You can connect an external micro-
1
phone with a /8-inch plug to the re-
The built-in condenser microphone is
a high-sensitivity microphone that
easily picks up sounds, near or far.
This is handy for recording confer-
ences or lectures.
corder. This is handy for when you
want to record only an individual’s
voice and exclude all other sounds
in the surrounding area. Your local
Radio Shack store carries a wide
variety of external microphones.
1. Load a blank cassette tape, or
one you want to record over, into
the cassette compartment.
Connecting an external micro-
Note:
phone automatically disconnects the
built-in condenser microphone.
2. Place the recorder 2 or 3 feet
from the recording source.
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1. Load a blank cassette tape, or
one you want to record over, into
the cassette compartment.
Recording from an External
Audio Source
You can record directly from an ex-
ternal audio source, such as a radio,
tape deck, or CD player, using a suit-
able patch cord (not supplied) with a
1/8-inch plug.
2. If the external microphone has
1
only a /8-inch plug, insert it into
the recorder’s MIC jack.
EAR AUX REM MIC
MIN – VOLUME – MAX
Before you connect an exter-
Note:
nal audio source to the recorder, be
sure the source’s and the recorder’s
volume controls are set to their mini-
mum setting.
1. Load a blank cassette tape, or
one you want to record over, into
the cassette compartment.
If the external microphone has
two plugs and an on/off switch,
you can remotely control the
CTR-94 from your microphone.
2. If you connected an external
microphone, disconnect it.
3. Connect your external audio
source to the AUX jack, using an
optional patch cord with a 1/8-
inch plug at one end and the
appropriate plug at the other end
1
Insert the microphone’s /8-inch
plug into the recorder’s MIC jack,
and the smaller plug into the
REM jack.
that
matches
your
audio
3. Press RECORD to begin record-
ing. Both PLAY and RECORD
lock down.
source’s output jack.
To temporarily stop record-
Note:
EAR AUX REM MIC
MIN – VOLUME – MAX
ing, press PAUSE on the recorder
(or OFF on the microphone). To
resume recording, press PAUSE
again on the recorder (or ON on
the microphone).
4. Speak into the external micro-
phone.
4. Start the sound source and set
its volume to a normal listening
level.
5. Press STOP/EJECT to stop
recording.
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Note: During recording, the
speaker is muted. If you want to
monitor the recording, use the
supplied earphone.
TAPE TIPS
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) nor-
mal-bias cassette tapes. We do not
recommend long-play cassette tapes
such as C-120s because they are
thin and easily tangle.
RECORD
5. Press
ing. Both
lock down.
to begin record-
and
PLAY RECORD
Note: To temporarily stop
PAUSE
recording, press
resume recording, press
again.
.
To
PAUSE
STOP/EJECT
6. Press
recording.
to stop
Erasing a Cassette Tape
Important: Most material on prere-
corded tapes is copyrighted. Unau-
thorized duplication of copyrighted
material is a violation of the copyright
laws of most countries and such du-
plication may result in fines and/or
imprisonment. Note, however, that in
the United States, it is not a violation
of U.S. copyright laws for a consumer
to use an audio recording device to
duplicate musical recordings for non-
commercial (personal) use.
To record over a cassette tape, sim-
ply record as usual. The cassette
deck records over the previous re-
cording.
To erase a cassette tape, insert the
MIC
supplied erasing plug into the
RECORD
jack and press
.
EAR AUX REM MIC
MIN – VOLUME – MAX
Note: Be sure you have not connect-
AUX
ed anything to the
jack.
If you need to erase an entire cas-
sette, you might prefer using a bulk
tape eraser, which is available at
your local Radio Shack store.
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Caution: Removing the erase-pro-
tection tabs does not prevent a bulk
eraser from erasing a cassette tape.
Preventing Accidental
Erasure
Cassette tapes have two erase-pro-
tection tabs — one for each side.
When a tab is in place, you can
record on that side.
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 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.
To restore the sound quality, fast-for-
ward 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
cassette’s outer shell on a flat sur-
face.
(illus)
If you later decide to record on a tape
side after you have removed the
erase-protection tab for that side,
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-pro-
tection tab.
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.
(illus)
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MAINTENANCE
Your Radio Shack CTR-94 DC Portable Cassette Tape Recorder is an example
of superior design and craftsmanship. The following suggestions will help you
care for your CTR-94 so you can enjoy it for years.
Keep the CTR-94 dry. If it gets wet, wipe it dry immediately. Liq-
uids might contain minerals that can corrode the electronic cir-
cuits.
Handle the CTR-94 gently and carefully. Dropping it can damage
circuit boards and cases and can cause the CTR-94 to work im-
properly.
Use and store the CTR-94 only in normal temperature environ-
ments. Temperature extremes can shorten the life of electronic
devices and distort or melt plastic parts.
Keep the CTR-94 away from dust and dirt, which can cause pre-
mature wear of parts.
Wipe the CTR-94 with a damp cloth occasionally to keep it looking
CLEANER
new. Do not use harsh chemicals, cleaning solvents, or strong de-
tergents to clean the CTR-94.
Modifying or tampering with the CTR-94’s internal components can cause a mal-
function and might invalidate your CTR-94’s warranty. If your CTR-94 is not per-
forming as it should, take it to your local Radio Shack store for assistance.
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4. tape head cleaning solution or
denatured alcohol to gently
clean the capstan, pinch roller,
tape head, and tape guides.
CLEANING THE TAPE-
HANDLING PARTS
Dirt, dust, or particles of the tape’s
coating can accumulate on the tape
heads and other parts the tape
touches. This can greatly reduce the
cassette recorder’s performance.
(illus)
To prevent noise and poor high-fre-
quency response, clean the cassette
recorder’s tape-handling parts after
every 20 hours of use.
Note: Your local Radio Shack store
carries a complete line of cassette
cleaning supplies.
5. When you finish cleaning, press
STOP/EJECT
and close the com-
partment.
1. Remove the batteries and dis-
connect any other power source.
2. Open the cassette compartment
cover.
PLAY
3. Press
to expose the tape-
handling parts.
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SPECIFICATIONS
CASSETTE PLAYER
Track System ...........................................................................2-Track Monaural
Tape Speed .......................................................................................4.76 cm/sec
Recording System........................................................ Magnetic Erase, AC Bias
Frequency Response ............................................................ 125–6.3 kHz ±6 dB
Signal-to-Noise Ratio ..................................................................................55 dB
Wow and Flutter .........................................................................................0.35%
GENERAL
Power Requirements................................................................................. DC 6V
Four C Batteries (Cat. No. 23-551/651)
AC Adapter (Cat. No. 273-1662)
DC Auto Adapter (Cat. No. 14-844)
Dimensions (HWD).........................................................13/4 ¥ 511/16 ¥ 95/8 Inches
(45 ¥ 145 ¥ 245 mm)
Weight (without batteries)......................................................................... 1.75 lb.
(794 g)
Specifications are typical; individual units might vary. Specifications are subject
to change without notice.
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RADIO SHACK LIMITED WARRANTY
This product is warranted against defects for 90 days from date of purchase from
Radio Shack company-owned stores and authorized Radio Shack franchisees
and dealers. Within this period, we will repair it without charge for parts and labor.
bring your Radio Shack sales slip
Simply
as proof of purchase date to any
Radio Shack store. Warranty does not cover transportation costs. Nor does it
cover a product subjected to misuse or accidental damage.
EXCEPT AS PROVIDED HEREIN, RADIO SHACK MAKES NO EXPRESS
WARRANTIES AND ANY IMPLIED WARRANTIES ARE LIMITED IN DURATION
TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES CONTAINED
HEREIN. Some states do not permit limitation or exclusion of implied warranties;
therefore, the aforesaid limitation(s) or exclusion(s) may not apply to the pur-
chaser.
This warranty gives you specific legal rights and you may also have other rights which vary from state to
state.
We Service What We Sell
9/94
RADIO SHACK
A Division of Tandy Corporation
Fort Worth, Texas 76102
3A6
Printed in Hong Kong
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