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AM-FM
STEREO TUNER
INSTRUCTION MANUAL
the sound approach $o quality
^KENWOOD
_________________
_
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INTRODUCTION
Thank you for purchasing our tuner. Because we take great pride
in the long tradition of quality components the name Kenwood re
presents, your purchase of a Kenwood tuner places you in a distinguish
ed family of connoisseurs of superb high-fidelity sound reproduction.
The purpose of this manual is to acquaint you with the operating
features of your new tuner. You will notice that in every detail of plan
ning, engineering, styling, operating convenience, and adaptability, we
have sought to anticipate your needs and desires.
We suggest that you read this manual carefully. Knowing howto
set up your tuner, to the best advantage, will enhance your listening
pleasure right from the start. You will also become aware of the ease
with which you can adjust your tuner to meet your special require
ments.
Turn the pages and become acquainted with the exciting features
of your new tuner that will remain new for endless hours of listening
pleasure.
MAINTENANCE
CONCERNING TRANSISTORS
NOTES
1. Units shipped to the U.S.A. and CANADA are designed to be
operated with 120 volts AC only. Units shipped to the Scan
dinavian countries are designed to be operated with 220 volts
AC only. Units shipped to the U.K. are designed to be
operated with 240 volts AC only. Therefore the above units
are not equipped with an AC Voltage Selector Switch so all
reference to such a switch throughout this manual should be
disregarded.
2. Units shipped to all other countries are equipped with an AC
Voltage Selector Switch on the rear panel that is preset at
the factory to the voltage generally available in the destina
tion area. It is very important, however, to check the Volt
age Selector Switch setting and make sure that it corresponds
to your line voltage before connection the power cord into
an AC outlet. If the Voltage Selector Switch requires re-set
ting, follow the directions outlined on page 5.
Transistors differ fundamentally from radio vacuum tubes and
require special attention to ensure their full performance capabilities.
Given proper care, transistors will provide years of practically troublefree performance.
(a) Avoid locations subject to direct sunlight.
(b) Avoid high or low temperature extremes.
(c) Keep the tuner away from heat radiating sources.
GROUND
Although broadcasts can be received without a ground connection,
it is recommended that a good ground connection be made to a buried
grounding rod or water pipe to reduce interference and ensure safety.
Never use a gas pipe for a ground connection, however.
CONTENTS
FEATURES ................................................................................... 3
INTERCONNECTING DIAGRAM.................................................. 4
CONNECTING INSTRUCTIONS .................................................. 5
CONTROLS AND THEIR FUNCTIONS
OPERATING INSTRUCTIONS
TROUBLE SHOOTING................................................................11
....................................................
.......................................
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1. Stereo FM Reception Approaching Perfection with D.D. MOS
FETs Linearity to 5 MHz, and Exclusive PLL Control Circuit.
2. Dual Diffusion Type MOS FETs and 8-Gang V.C. Up Front.
3. Selectivity Selector and Special Filters for "Unmeasurable" Dis
tortion.
4. Quadrature Process for Wide Range Linearity to 5 MHz.
5. "Only Kenwood" Circuits for Awe-Inspiring Stereo Separation.
6. New Dial Scale in 200 kHz Units.
7. Four Meters for Total Control.
8. A 3-position Muting Switch.
9. Output Level Control and Variable/Fixed Output Terminals.
10. New 75 ohm Connector.
11. Built-in De-emphasiser to Match Any Dolbyized FM Broadcasts.
FEATURES
12. Excellent AM Reception.
13. Multipath Outputs.
14. Rear Cushion Provided.
15. Elegant Styling Matches Technical Excellence.
* Dolby is a Trade Mark of Dolby Laboratories, Inc.
WARNING:
TO PREVENT FIRE OR SHOCK HAZARD,
DO NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.
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INTERCONNECTING DIAGRAM
DIRECTION OF
STATION '*
EARTH
FM OUTDOOR
ANTENNA
300« FEEDER
-
---------------------
M
---1_
75«
____________
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FM INDOOR ANTENNA
■ _l
|300ai
_________
-FM MULTIPATH-
o É1 o
OET. OUT
DIMMER
ON^^OFF
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s
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See page 5
4To AC
• • Ob ••
LEFT SPEAKER INTEGRATED AMPLIFIER RIGHT SPEAKER TAPE DECK
OUTLET
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CONNECTING INSTRUCTIONS
OUTPUT
VARIABLE
These jacks connect to the stereo amplifier's TUNER or AUX
input terminals. The level of these terminals is controlled by the Out
put Level knob on the front panel.
FIXED
These jacks connect to the tape deck Line Input terminals. The
signal level from the output terminals cannot be controlled from the
KT-8300; this must be done with the tape deck input level controls.
FM DE-EMPHASIS SWITCH
Selects 75/iS (50/is) or 25/iS FM DE-EMPHASIS for accurate recep
tion of Dolbyized FM signals. Normally, this switch should be left in
the 75/iS (50/is) position. However, if the station is broadcasting the
Dolbyized signal using a 25/iS pre-emphasis, put this switch in the
"25/is" position to obtain flat FM frequency response. If in doubt,
call the station.
Note: For correct reception of Dolby broadcast, the Dolby Adaptor must be used without
fail.
DIMMER SWITCH
The Dial illumination can be dimmed if desired by setting this
ON-OFF switch to ON.
DET. OUT (DETECT OUT)
The FM detector circuit output is made available here so that this
tuner will be ready for 4-channel broadcasting developments in the
future. When FM discrete 4-channel broadcasting becomes a reality, a
simple demodulator connected here will enable you to fully enjoy this
coming development.
AC VOLTAGE SELECTION
The KT-8300 operates on 110 - 120 volts AC or 220 - 240 volts
AC. The AC Voltage Selector Switch on the rear panel is set to the
voltage that prevails in the area to which the tuners are shipped. Before
operating this tuner, make sure that the position of the AC Voltage
Selector Switch matches your line voltage. If not, it must be changed
to the proper setting.
To change, first disconnect the AC power cord. Then remove the
stopper plate and slide the AC Voltage Selector Switch to the opposite
side. Then reattach the stopper plate to the other side.
FM MULTIPATH JACKS
This unit is provided with FM multipath jacks through which
multipath distortion can be detected in two ways. In one way these
jacks are connected with an oscilloscope and the antenna is positioned
at the optimum height and in the best direction by observing the dis
played wave form until distortion can be lowered to a minimum level.
In the other way the antenna is positioned in a direction in which a
deflection in the multipath meter on the front panel is reduced to a
minimum.
Note: When handling the oscilloscope, please refer to the instruction manual attached to it.
Note: Our warranty does not cover damage caused by excessive line voltage due to improper
setting of the AC Voltage Selector Switch.
Stopper plate
ACllO 120V ◄ ►AC220 240V ACllO 120V^ ►AC220 240V
(120V ◄ ► 220V) (120V^ ► 220V j
AC VOLTAGE SELECTOR SWITCH
1. Remove screw and stopper plate.
2. Switch lever to opposite side.
3. Lock lever by attaching stopper
plate to opposite side screw.
)is European type.
(
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CONNECTING INSTRUCTIONS
FM ANTENNA
Four terminals are provided for connection to a 300 or 75 ohms
FM antenna as shown below.
For good FM stereo reception, always use the best antenna pos
sible. In areas close to the transmitter, a simple T-Type antenna may
suffice. It should be remembered, however, that the pickup of reflec
tions (similar to "ghosts" on TV) will result in poor stereo reception.
These reflections must therefore be reduced to a minimum, either
by careful orientation of the indoor dipole antenna or, if this will not
eliminate them, by using a more directional outdoor type antenna.
In areas a greater distance from the transmitter, the use of an
outdoor antenna is highly recommended. These are available in various
types. For reception of stations scattered in many directions, a nondirectional type antenna will offer better results. When using a direc
tional antenna, always orient it for the best reception of the desired
station. The correct position will be indicated by maximum deflection
of the Signal Meter on your tuner.
Keep FM antennas away from roads.
Mountain Weakened Signal
/ 'ftik
**" Directl^^ Building
JVave
Weakened
Signal
DIRECT WAVE AND REFLECTED WAVE
FM T-TYPE ANTENNA
TWIN LEAD(300S2) CONNECTION
INNER
CONDUCTOR
(+)
OUTER
SHIELD
(BRAID)
Strip the coaxial cable as shown in (A).
Loosen the screws and connect the cable as shown in (6).
Then tighten all screws for a connection like (C).
COAXIAL CABLE(75^) CONNECTION
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CONNECTING INSTRUCTIONS
1. Arrange the coaxial cable 3C 2V as illustrated.
13mm
2. Mount the F-type plug on the coaxial cable 3C 2V.
Fold back the shield
Ring
Coaxial cable
(3C 2V)
3. Move the ring to the illustrated position and flatten it with pliers.
net wire.
Insert the tip of the F-type plug
in this gap until the shield net
wire is hidden within the plug.
■DU
F-type plug
AM ANTENNA
The ferrite stick antenna mounted at the rear panel of the tuner
will provide satisfactory reception of local stations with strong signals.
Because the ferrite stick antenna has directive properties, its direction
should be adjusted for best reception while listening to a station.
(See Figure below)
AC cords laid adjacent to AM ferrite stick antenna may interfere
with reception. Keep them away as far as possible from the ferrite
stick antenna.
In fringe areas or in locations surrounded by steel frame buildings
where satisfactory reception cannot be obtained with the ferrite stick
antenna, an AM outdoor antenna should be connected to the AM
terminal.
Coaxial cable
Pull it by means of
pliers, etc.
Ring
COAXIAL CABLE(75 n) CONNECTION
Ring Shield net
wire
Pliers, etc.
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CONTROLS AND THEIR FUNCTIONS
© POWER SWITCH
Move up to ON to power the set, down to turn it OFF.
The dial indicator lights when the power is on.
@ OUTPUT LEVEL CONTROL
The signals passing from the OUTPUT (VARIABLE) terminals can be
controlled by the OUTPUT LEVEL knob. Use the controls in the
following situations;
1) When the KT-8300 is connected to a stereo amplifier and the
output level is too high for the input terminals, or too low.
2) When the tuner output level does not match that of other units
(turntable, tape deck, etc.) connected to the amplifier. When
there is a difference in output levels between AM performance
and FM performance.
® MUTING SWITCH
This switch silences interstation noise on the FM band.
The switch positions and functions are as follows:
1: Use this setting when the (2) setting cancels the desired station
along with the noise.
2: To tune in a strong signal station.
Note: When tuning to a weak signal station, turn the MUTING switch off. This will not
affect the noise, etc., but such interference usually disappears when you are near or
right on the station at any rate.
© TUNING KNOB
Use the tuning knob to select the AM and FM station desired.
Adjust further by tuning for maximum deflection of the SIGNAL
meter while listening to the speaker output.
® IF BAND SELECTOR
Switch positions and functions are as follows:
WIDE — This setting is suitable for normal usage in an area where no
radio interference occurs. Reception with a low distortion can be ex
pected.
NARROW —This switch is depressed if radio interference with an ad
jacent station is rigorous.
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(D
CONTROLS AND THEIR FUNCTIONS
® METER SWITCH
Switch positions and functions are as follows:
BUTTON DEPRESSED- The DEVIATION/MULTIPATH Meter acts
as a MULTIPATH Meter.
BUTTON RELEASED - The DEVIATION/MULTIPATH Meter acts
as a DEVIATION Meter.
® SELECTOR SWITCH
FM MONO — For FM monaural reception.
FM AUTO — For reception of both FM monaural and stereo. The
tuner will automatically identify and separate FM stereophonic broad
casts. When an FM stereo broadcast is tuned in the STEREO indica
tion lights up.
MPX FILTER — Unlike FM monaural reception, high frequency noise
may sometimes be encountered when receiving FM stereophonic broad
casts. The MPX FILTER in this tuner effectively cuts such disturb
ances. This switch has nothing to do with monaural reception.
AM — For AM reception.
® DEVIATION/MULTIPATH METER
DEVIATION — Functions as a meter which indicates a peak value of
the modulation degree for FM broadcast. This meter makes it possible
to monitor the maximum modulation degree for the received FM
broadcast signal. If used in combination with the VU meter of the
tape deck, an optimum recording level can be obtained.
MULTIPATH — Functions as a multipath detection meter. Recep
tion with a minimal distortion is possible by depressing this switch and
positioning the antenna in a direction where this meter gives a mini
mum deflection.
® SIGNAL/TUNING METER
SIGNAL METER — This meter indicates incoming signal strength at
the antenna with correct linearity from the weakest to the strongest
signals.
TUNING METER — This meter is used for precise tuning to the center
of the FM channel. Turn the tuning knob until meter pointer is at the
center of the heavy black area of the meter scale. Center tuning
provides maximum separation and minimum distortion.
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OPERATING INSTRUCTIONS
FM RECEPTION
1. Set the Selector switch to FM AUTO.
2. Set the MUTING LEVEL switch to OFF.
This switch cuts FM noise between stations with an efficiency
that varies according to 1 (weak) or 2 (strong) settings. But it
also affects reception of weak FM signals, and should therefore
be left off except when tuning. For details, see the facing page.
3. Turn the TUNING knob to select a station. First tune so that the
SIGNAL meter needle swings as far to the right as possible, then
finish the precise tuning by centering the TUNING meter needle.
If the STEREO indicator lamp lights, the broadcast is in stereo;
if not, it is monophonic.
4. Set the OUTPUT LEVEL knob to its central position. For details,
see the facing page.
5. If you are using a stereo amplifier, set its controls for the desired
volume level and tonal quality.
6. If continuous high-frequency noise occurs during FM stereo listen
ing, set the Selector switch to MPX FILTER position.
Note: It may be impossible to eliminate noise from an FM stereo broadcast if the signal is
extremely weak. In such a case the relative signal strength can be improved by switch
ing to FM MONO with the Selector switch. While the stereo effect will be lost some
what, a great deal of the noise can be substantially eliminated in this way.
GROUND
For optimum safety and noise-free performance by sure the GND
terminal is connected to a good ground.
AM RECEPTION
1. Set the Selector switch to position AM.
2. Turn the tuning knob to select a station. Tune in so that the
SIGNAL meter needle swings as far to the right as possible.
3. If you are using a stereo amplifier, set its controls for the desired
volume level and tonal quality.
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TROUBLE SHOOTING
In ¡nitially installing this tuner, improper connections may result in one of the following
indications. Their possible causes and corrective measures are listed below to facilitate
installation. If you cannot find or correct it, see your audio dealer.
SYMPTOM
Continuous low frequency buzz. Most noticeable at night
on weak signal stations.
Poor AM reception.
Continuous high frequency whine which increases at
night.
Intermittent buzzing or sharp cracking noise. Lightning interference.
Continuous hiss or buzzing interference with broadcast.
Becomes louder during stereo.
Occasional sharp buzzing or crackling noise.
FM Automatic Circuit fails to respond to stereo broad
cast.
Interference from electrical appliances or atmospherics.
In ferroconcrete buildings or in areas remote from the
broadcasting station.
TV interference.
10 kHz beat interference from adjacent AM station.
Interference from fluorescent lamps.
AC plug Connection.
Incoming signal too weak at ANT terminal.
Automobile ignition noise. More noticeable on weak
signals.
Incoming signal is exceptionally weak. Erect an FM outdoor antenna.
PROBABLE CAUSE
CORRECTION
Erecting a 10 meter outdoor antenna and securing good
ground conditions should reduce interference consider
ably. Complete elimination is difficult.
An outdoor antenna necessary.
Turn TV off. (Neighboring TV set may also be the cause).
Impossible to eliminate from tuner side.
Use MPX Filter to cut off high frequency interference,
amplifier side.
Usually unavoidable in certain areas.
Occurs when lamps are on and cannot be helped.
Try reversing AC plug connections.
Occurs only on certain stations due to high voltage power
line and cannot be helped in many areas.
Erect outdoor FM antenna if only indoor T-type is used.
A 5 or 7 element antenna is necessary if you are located
at a considerable distance from the broadcasting station.
Erect outdoor FM antenna as far away from roads as
practicable.
RATING
Power Consumption;
Dimensions:
Weight;
22 watts
W 16-15/16"
H 5-7/8"
D 14-13/16"
(430 mm)
(149 mm)
(376 mm)
18.7 lbs. (8.5 kg)
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the sound approach to quality
^KENWOOD
6432 PRINTED IN JAPAN B50-1513-00 (UM) (T|
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