This is the 4 pages manual for Accuphase T 108 Brochure.
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SYNTHESIZER FM STEREO TUNER
The proliferation of 005. music tapes. videotapes.
and laser discs has been giving increasing variety to
music program sources. The result of this is that
there is a wide variety of music genres being pre-
sented by the broadcasting media around the clock.
Listeners can hear the latest music, live overseas
programs. local performances, and exquisite pieces
of music from the past, Many of these will include
pieces that are not available for purchase and can.
therefore. only be heard over the radio.
It can be said that the radio is an integral part of
modern life It enhances the level of our culture and
helps to ease our mind, Among the various broad»
casting modes. FM radio broadcasting provides al<
most flawless audio transmission. FM radio is able
to bring live performances into your home with a
sound quality comparable to that of CDs.
The high quality Accuphase FM Stereo Tuner T-
108 is designed especially for music lovers who are
keen on sound performance. In anticipation of the
increasing number of FM stations, the T-108 has a
memory which is capable of storing 16 preset FM
stations, the FM bandwidth, and the filter settings.
Accuphase's newly developed pulse-tuning system
allows listeners to use a traditional tuning knob to
tune in to their desired station.
A tuner with a sophisticated. balanced output
circuitry has been attained for the first time by the T-
108. A remote control unit worthy of such a distinc-
tive tuner is provided as an accessory to the T-108.
The T-108 has a champagne-gold front panel with
an elegant. brushed finish to match the appearance
of the range of other Accuphase audio equipment.
Electronic Tuning System Gives Outstanding
The highly accurate electronic tuning system in the TV
108 receives de5ired Signals with quartz»controlled
premsion. The tuned frequency channels can be lock,
edain. with minimum distortion, at the point of highest
sensitivny. There is almost no frequency drift over time
or due to changes in temperature, Because of the
electronic tuning. almost no modulation distortion or
noise is caused by external shocks.
16-Station Random Memory
in preparation for increasing numberof FM stations. the
T-108 is equipped with a memory that can preset 16
different FM stations at random. Any one at these can
then be instantaneously tuned-in at the press of a
button. With weak radio signals, it may sometimes be
necessary to use the additional filtering or to change
the FM bandwidth. In such cases. the T-108 memory
can be programmed With the preset filter and sensittvtty
levels required to meet the signal conditions oi the
Aocuphase's Newly Developed Pulse-Tuning
System with Traditional. Manual Tuning Knob
In addition to the 16-siation random memory. the T408
is equipped With a traditional tuning knob. which allows
users to manually tune to the desired station We call
this the pulse-tuning system It has been developed
especially for manual electronic tuning. In this system.
. IF AMPLIFIER
Fig.1 circuit Diagram of Front-End
the tuning frequency is
controlled by a pulse
count, generated by
the radial slits on the
knob shaft. The opera-
tion of the pulsevtuning
system may be. so to
speak. compared to
driving a car with a
interference Rejecting, Double-Tuned
in any tuner. the front-end is virtually its heart." It
performs the critical functions: it selects the input sig»
nal. amplifies it. generates the intermediate frequency
signal. and delivers it to the detector. As one might
expect. it is often necessary torthe front-end to process
a weak signal, Doing that successfully is not the only
requirement of a quality tuner. A sophisticated tuner is
also expected to have a frontend that can reject inter-
ference and signal distortion. These are the absolute
requirements for good signal reception and audio
quality. . .
Fig. l is the circuit diagram of the T-lOEs t d
Double-tuning of the inputrsignai at the input a m~
piification stages enables the front-end to reject even
strong interference This is further enhanced by a fre-
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provides a wide um um.
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Fig. 5 stereo Demodulatnr til
the T-1 08 '
Fig. 4 Trimmer Potantiomatef
Type stereo Demodulntor