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| Pioneer SM-101 |
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| 49,800yen(? at the 1970 in-the-early time) |
Stereo power
amplifier which devoted in the maniac youth and was designed.
In order
to obtain the uniform power covering a low distortion and a wide band, the whole
page hardwired-connection pure complimentary OCL circuitry is adopted.
Moreover, the Mie diffusion type power transistor with the destructive
intensity with high PNP and NPN developed for Oide power is used for a
transistor in the pair.
In order to make DC potential into the stable
thing, two steps of differential amplifier is used.
The stability is
conjointly increased with the temperature-compensation circuitry.
The
original circuitry which combined the relay and the electronic circuitry (eight
transistors, 10 diode) is adopted as a protection network.
It prevents the
direct-current balance of an output stage collapsing, the differential
amplifier's detecting this, if a direct current component flows, and cutting a
relay circuit, and a direct current flowing into a speaker.
Moreover, when
the speaker output-terminal was short-circuited, or when an excessive electric
current flows into an output stage, the alternating-current component of an
output stage is detected, a relay circuit is cut, and it has a structure which
protects a power transistor.
At the time of power-switch ON, it works as a
muting, and prevents an unpleasant noise coming out from a speaker.
The
indicator of the front panel blinks at the time of a protector operation.
The output level meter is carried in the front panel.
The
sensitivity of meter can be switched to Off, and 0dB-10dB five positions of
-20dB-30dB.
Two inputs are carried and can be switched with a front
switchpoint.
Moreover, the Input-sensitivity selector of a constant input
impedance is carried, and if needed, four positions are changed and are made.
The speaker phase circuit changing switch which achieved the
right-and-left independency is carried.
Moreover, the change of A, B, and
A+B is possible for a speaker output-terminal by those with two line, and a
selector.
One set of one-set property data is attached.
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.JPG) |
| Form |
Stereo power amplifier |
| Circuit system |
Whole page hardwired-connection
complimentary OCL circuitry |
| Music power (IHF) |
240W (4ohm)
170W (8ohm) |
| Effective output |
片 channel drive
70W/70W (8ohm)
90W/90W (4ohm)
Both channel drive
60W+60W (8ohm)
78W+78W (4ohm)
20Hz - a 20000Hz output (both channel drive)
50W+50W (8 ohms,
0.15% or less of distortion) |
| THD |
0.1% or less (at the time of an effective
output)
0.05% or less (at the time of 8-ohm and 35W/35W output)
|
| Cross modulation distortion |
0.1% or less (at the time of an effective
output)
0.06% or less (at the time of 8-ohm and 35W/35W output)
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| Output bandwidth (IHF) |
5Hz - 30000Hz |
| Frequency characteristic |
8Hz - 70000Hz, and +0 -1 dB
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| Input sensitivity/impedance (an effective
output, 1kHz) |
0.5V, 1V, 2V, 5V/50kohm |
| Load impedance |
4ohm-16ohm |
| Dumping factor |
40 (8 ohm, 1kHz) |
| A hum and a noise (IHF short circuit)
|
95dB or more |
| Meter sensitivity selector |
OFF, 0dB-10dB-20dB-30dB |
| Level meter (L, R) |
0dB=70W/8 ohm |
| The semiconductor used |
Transistor: 26
Diode: 24
Others
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| Supply voltage |
AC100V, 50Hz/60Hz |
| Power dissipation |
125W |
| Maximum electric power consumption
|
330W |
| Power receptacle |
Interlock: One line
Un-interlocking.:
One line |
| Dimensions |
Width 430x height 144x depth of 337mm
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| Weight |
10.7kg |
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