Pioneer SX-515
¥ 53,800 (released in 1972)
Commentary
Stereo receiver with improved tuning accuracy
The FM tuner section consists of an FET in the front end and an IC and ceramic filter in the IF section to improve the image ratio and selectivity.
The stereo demodulation circuit uses a switching system with high stability and wide frequency characteristics, and a differential amplifier improves separation.
It is equipped with an MPX noise filter to cut out noise that may occur during stereo demodulation.
The dial scale is a wide type that covers the entire panel surface, and the FM scale is a linear scale with equal spacing. This makes it easy to read the frequency and to select the nearest station.
In addition, a tuning meter is mounted to improve the reception accuracy.
It is equipped with a muting switch that eliminates unpleasant inter-station noise during FM channel selection.
The low-frequency section has a circuit structure composed entirely of silicon transistors.
The Klix/Klukš top tone control makes it easy to correct sound quality, and the electronic power muting circuit prevents unpleasant noise when the power switch is turned on.
Equipped with two Tape Monitor terminals, it is possible to duplicate from tape to tape.
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Model Rating
| FM/AM stereo receiver | |||||||
| FM Tuner Section | |||||||
| Practical sensitivity (IHF) | 2.2 μ V | ||||||
| Capture Ratio (IHF) | 3dB | ||||||
| Effective selectivity (IHF) | 45 dB or more | ||||||
| S/N | 65dB | ||||||
| Image Interference Ratio (82 MHz) | 55 dB or more | ||||||
| IF Interference Ratio (78 MHz) | 80 dB or more | ||||||
| Spurious interference ratio (82 MHz) | 85 dB or more | ||||||
| AM suppression ratio | 50dB | ||||||
| Harmonic distortion factor (100% modulation) | Mono : not more than 0.6% Stereo : 0.8% or less |
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| Stereo Separation (1 kHz) | 40 dB or more | ||||||
| Residual carrier level | 40 dB or more | ||||||
| Antenna | 300 ohm balanced 75 Ω Unbalanced Type |
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| Muting | ON-OFF enabled | ||||||
| <AM Tuner Section> | |||||||
| Practical sensitivity (IHF) | 15 μ V | ||||||
| S/N (30% modulation) | 50 dB or more | ||||||
| Image Interference Ratio (1 MHz) | 45 dB or more | ||||||
| IF interference ratio | 35 dB or more | ||||||
| Antenna | Ferrite bar antenna | ||||||
| Amplifier Unit | |||||||
| Music Power (IHF) | 72W (4 Ω) 52W (8 Ω) |
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| Effective power |
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| Harmonic distortion factor | 1% or Less (Effective Output) | ||||||
| Cross modulation distortion factor | 1% or Less (Effective Output) | ||||||
| Output Bandwidth (IHF) | 10 Hz to 45000 Hz | ||||||
| Frequency characteristic | 15 Hz to 30000 Hz ± 1 dB | ||||||
| Load impedance | 4 Ω ~ 16 Ω | ||||||
| Damping factor | 40 or More (8 Ω, 1 kHz) | ||||||
| Input Sensitivity / Impedance (1 kHz at effective output) |
Phono : 2.7mV/50k Ω MIC : 6mV/100k Ω AUX : 200mV/70k Ω Tape Mon1, 2 : 200mV/70k Ω |
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| Recorded output | Tape Rec1, 2 (pin jack) : 200 mv DIN connector : 30 mv |
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| Tone control | Bass and Treble | ||||||
| Equalizer | RIAA S.T.D | ||||||
| Loudness (at -40dB volume) | 100Hz:+11.5dB 10kHz:+6dB |
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| Hum and noise (IHF) | Phono : 75 dB or more AUX : 85 dB or more |
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| <General> | |||||||
| Rated power consumption | 60W | ||||||
| Maximum Power Consumption | 120W | ||||||
| External dimensions | Width 450x Height 145x Depth 360 mm | ||||||
| Weight | 8.0kg | ||||||