|79,000yen(July, 1969 release)
Stereo power amplifier finished as amplifier which
became independent by making the main part of SQ38F into a prototype.
of NEC is adopted as the output tube as well as SQ38F.
based on the Mullard type circuitry, and in order to employ the special feature
of this circuitry efficiently, the property of a high region is improved using
the ball of low internal resistance in the voltage amplification stage of the
6267 is used for this fraction by the triode interconnection,
and the gain is earned using 6DT8 of High Gm in relation to this in the phase
The phase compensator is inserted in the sub- side of
an output transformer.
This having prevented that amplifier becomes unstable
from the damping of a load intensity in the high region where the impedance of a
speaker goes up (it becomes near no-load).
Moreover, in order to avoid the
influence of the impedance from the input of control amplifier etc.,
consideration for inserting a buffer resistor in the grid of the first rank, or
pressing down floating of the frequency characteristic produced by transition of
a volume is carried out.
OY15 type is adopted as the output transformer.
As for the chassis, the overall is given to the semigloss coating of the
dark gray at hairline manipulation silver finish of aluminum.
There was also the model "KMQ60" which is unwired & unadjusted
kit in this MQ60.
||Tube stereo power amplifier
||30W/30W (4, 8, 16ohm)
||0.1% (at the time of 1W output)
the time of the maximum output)
||15Hz - -60,000Hz one dB
||90dB or more
||0.7mV or less
||About 15 (1kHz)
||4ohm, 8ohm, 16ohm (switchpoint switching)
|The semiconductor used etc.
|Thermionic tube (eight pieces)
|Semiconductor (five pieces) :
||DS16A: Four pieces
DS16C: One piece
||Width 410x height 160x depth of 205mm
||MQ60 kit KMQ60 (45,000yen)