|37,800yen(March, 1968 release)
The FM/AM tuner which began the front end of FET and
2 steps of RF 4-unit variable condenser, and equipped various functionalities as
a highest-class tuner besides being three-step AGC, five steps of IF, four steps
of limiters, etc.
FM front end has adopted the silicon transistor and
the 4-unit variable condenser as the 2nd step of junction types FET and RF, a
mixer, and an oscillator circuitry at RF first rank.
It is proud of high
amplification degree, high stability, the low noise, and the low distortion with
the intermediate frequency of five steps of IF and four steps of limiters of silicon transistor adoption.
The selectivity in the strong electric
field has also taken all possible measures against front end at two steps and
especially the IF section by three-step AGC which established one step of
non-aligning stage only in AGC.
It has succeeded in IF stage and the
power source of front end adopting the stabilizing supply of zener diode, and
especially front end carrying out temperature compensation of a from office
completely, and also being a stabilization of a power source, making the drift
from an office into a minimum, and removing an AFC circuit.
comfortable reception which a noise does not have is made as for a four-step
limiter and an interval to a noise cancellar by adopting the new method for
which a noise can be removed, without stopping the conventional high cut scheme and cutting the audible range where a frequency is high.
meter and especially the amplifier only for a muting, the large-sized meter of
the circular dial of a green ring is adopted as a syntony indication, it is made
legible, an aligning point is made sharp, and it is united with the hub of a
The multi-circuitry attained silicon-ization, and also
switching with highest stability and reliability was used for it, and it has
improved the channel separation.
FM stereo monophonic switching of a
pure electronic formula is carried.
In FM-AUTO, if an FM broadcast becomes a
stereo from a monophonic recording, the electronic switch will operate automatically.
Since FM antenna carries the attenuator of a 20dB down
with a local distant switchpoint, even if the input up to about 3V goes into an
antenna, it is not distorted.
Moreover, the impedance termination of two
circuitries (300ohm and 75ohm) is prepared.
Since AM tuner part has also
adopted 1 step of RF triple variable condenser and the ferrite bar antenna is
built in, it is enough without an antenna wire.
Output-voltage adjustment of a semipermanent is attached so that it can
connect with any amplifier, and an output circuit is with of FM Multiplex
|<FM tuner part>
||76MHz - 90MHz
||20dB quieting: 1.4microvolt±3dB
||0.8% or less (an input of 60dB, 100%mod)
||65dB (an input of 60dB, 100%mod)
||50dB or more
||80dB or more
||95dB or more
||90dB or more
|FM stereo separation
||35dB or more
||34dB or less
|A local/distant Switchpoint
||Local 20dB down
|<AM tuner part>
||535kHz - 1605kHz
||15microvolt±3dB (20dB, 1000kHz)
||100dB or more (1000kHz)
||20dB (an input of 60dB, 1000kHz)
||2V (0 - 2V variable)
||100 or more kohms
|The semiconductor used
||Width 345x height 155x depth of 334mm