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Pioneer SX-60T
¥ 54,900 (around 1960 s)
Commentary
A stereo receiver in which all circuits except RF circuits are made into transistors.
Mesa transistor 2SD47 is used for the amplifier in SEPP-OTL system.
A special heat-sensitive resistor (Posistor) is inserted in series to the power supply circuit of the excitation stage as a transistor protection circuit.
In the event of an error such as short-circuiting the speaker terminal, this sensor detects the heat generated by the power transistor immediately and controls the input to the final stage.
Four New Vistas (6CW4) small vacuum tubes are used for the high-frequency amplification, mixing, and oscillation circuits of the tuner section, and high sensitivity is realized by the adoption of a tuning amplification method using cascode connection and 3-row varicon.
In addition, this part uses a front end pack unitized into one block to enable stable operation.
The IF circuit uses a double-tuned 4-stage amplifier circuit.
It is equipped with a muting circuit to eliminate inter-station noise generated during FM station selection.
This function can be turned ON / OFF as required.
The multi-circuit employs a switching system and an automatic switching mechanism.
This circuit can be switched manually without using the automatic mechanism (FM-AUTO), so that unstable switching, which tends to occur in weak electric power regions, can be prevented.
The indicator lamp lights when an stereo broadcast transmission is received.
The AM tuner section has high-frequency amplification using a 3-row varicon, and has a built-in bar antenna.
Equipped with a tape head terminal with a built-in NAB characteristic equalizer, you can easily play 4-track stereo tapes by connecting to a tape deck (dedicated playback device).
Equipped with a tape monitor switch, tape recording / playback terminal, and DIN standard one touch connection connector terminal.
Model Rating
| Type | AM/FM multi-integrated stereo amplifier | ||
| Tuner Section | |||
| Circuit system | New Vista 4 Cascode Front End Double-tuned IF stage 3-stage limiter 1-stage With Muting Circuit With AFC ON-OFF Switch |
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| Receiving frequency | FM : 76 MHz to 90 MHz AM : 535 kHz to 1,605 kHz |
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| Intermediate frequency | FM:10.7MHz AM:1,605kHz |
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| Practical sensitivity (IHF) | FM : 2 μ V AM : 16 μ V |
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| Image ratio | FM:50dB(82MHz) AM:63dB(1kHz) |
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| Antenna | FM : Input impedance 300 Ω balanced AM : Ferrite Loop Stick antenna self-contained |
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| Tuning instruction | Tuning meter With FM-AFC, AM-AGC |
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| <FM Multi Section> | |||
| Circuit system | Switching system With Stereo-Mono automatic switching device Stereo indicator With SCA Filter |
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| Channel separation | 36dB(1kHz) | ||
| Amplifier Unit | |||
| Circuit system | Mesa Silicon Power Transistor Using Driver Transformer SEPP-OTL System |
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| Music power | 40W (Distortion Factor 1% or Less, 16 Ω, IHF) | ||
| Frequency characteristic | 20 Hz to 20 kHz ± 2 dB | ||
| Output bandwidth | 25 Hz ~ 15 kHz (Constant Distortion Rate of 1%, IHF Standard) | ||
| Residual noise | 2.5 mv (8 Ω, Vol max, Tone under a control Point) | ||
| S / N ratio (Vol max at effective output Tone under a control point, IHF) |
Phono MAG:60dB Aux:65dB |
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| Input Sensitivity / Impedance | Phono MAG : 2.7mV/60k Ω Phono Cer/X-tal : 70mV/100k Ω Tape head : 1.5mV/150k Ω Tape monitor : 330mV/180k Ω Aux : 240mV/220k Ω |
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| Equalizer | MAG:RIAA Tape head:NAB |
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| Tone control | Bass : + 15 dB ~ -14dB (50 Hz) Treble : + 14 dB ~ -13dB (10 kHz) |
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| Filter | Low:7dB(50Hz) High:13.5dB(10kHz) |
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| Accessory function | Cut filter Loudness contour Headphone port Speaker circuit on/off Tape rec terminal for tape recorders Tape recording / playback connector (DIN standard) Transistor protection circuit |
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| <General> | |||
| Vacuum tube used |
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| Power supply circuit | FM front-end : double-wave rectification by silicon diode Body : bridge rectification by silicon diode |
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| Power supply voltage | 100 VAC ~ 117 V, 50Hz/60Hz | ||
| Maximum Power Consumption | 84W | ||
| Maximum external dimensions | Width 445x Height 150x Depth 430 mm | ||
| Weight | 12.5kg | ||
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