SANSUI SAX-500
¥ 53,800 (released in 1967)
Commentary
Solid-state integrated amplifier with FET in tuner section.
It uses a complimentary service Darlington SEPP-ITL-OTL circuit that uses silicon power transistors.
We use epitaxial silicon transistors for power transistors, low-noise silicon transistors specially selected for equalizers, and all-stage silicon transistors for low-frequency circuits.
The FM front-end uses a 3-row varicon, a junction-type FET in the RF stage, and silicon transistors in the mixer and oscillator circuit.
Moreover, the AGC circuit improves the selectivity in a strong electric field.
The IF stage employs carefully selected silicon transistors for high-frequency amplification and a newly developed intermediate frequency transformer.
It is equipped with a purely electronic FM stereo / monaural switching mechanism. In FM AUTO, when FM broadcasting changes from mono to stereo, an electronic switch automatically operates to change to stereo.
It is equipped with a stereo indicator that can confirm the radio wave of stereo and thing.
The AM antenna uses a high-sensitivity ferrite bar antenna.
An external antenna can also be used.
A protective circuit using a short-cut fuse is provided to prevent damage to the power transistor in the event of an accident, such as accidentally shorting the output terminal.
In addition to the Scratch Filter, which eliminates annoying scratch noise, it also features a loudness control, headphone jack, DIN connector, FM-AFC, tape monitor, and SCA filter.
Model Rating
| Type | Solid-state integrated amplifier | ||||
| Amplifier Unit | |||||
| Effective power |
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| Total harmonic distortion factor | 1.0% or Less (Rated Output) | ||||
| Power Band With (IHF) | 20 Hz ~ 50 kHz (8 Ω) | ||||
| Frequency characteristic | Power Amplifier Part : 15 Hz ~ 50 kHz ± 1 dB AUX : 20 Hz to 30 Hz ± 1 dB |
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| Hum and noise (IHF, rated output) | Phono : 70 dB or more AUX : 80 dB or more |
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| Channel separation (rated output) | Phono, AUX : 50 dB or more | ||||
| Output impedance | 4 Ω ~ 16 Ω | ||||
| Damping factor | 24 (8 Ω) | ||||
| Equalizer Characteristics (NF Type) | Phono:RIAA Tape Head:NAB |
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| Input sensitivity (effective output, 1 kHz) | Phono : 2.2 mV ± 3 dB Tape Head : 2 mv ± 3 db AUX, Tape Monitor (PIN, DIN) : 150 mv ± 3 db |
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| Recorded output | Rec Out (PIN) : 150 mv ± 3 db (100k Ω or more) Rec Out (DIN) : 25 mv ± 3 db (100k Ω or more) |
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| Tone control | Bass : ± 10 dB (50 Hz) Treble : ± 10 dB (10 kHz) |
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| Loudness control | 50 Hz : + 6 dB, 10 kHz : + 5 dB | ||||
| Noise filter | 10 kHz, -10dB | ||||
| FM Tuner Section | |||||
| Receiving frequency | 76 MHz to 90 MHz | ||||
| Sensitivity | 2 μ V ± 3 dB (S/N 20 dB, 30% MOD) 2.5 μ V ± 3 db (30% MOD) 2.5 μ V ± 3 dB (IHF) |
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| Image ratio | 45 dB or More (84 MHz) | ||||
| Signal-to-noise ratio | 50 dB or More (84 MHz, 30% MOD) | ||||
| Total harmonic distortion factor | Up to 1% (input 60 dB, 30% MOD, 84 MHz) | ||||
| Selectivity | 45 dB or More (84 MHz) | ||||
| Capture ratio | 3.5dB | ||||
| <FM multi-section> | |||||
| Channel separation | 35 dB or More (60 dB, 84 MHz) | ||||
| Total harmonic distortion factor | 1% or Less (Input 60 dB, 1 kHz, 84 MHz) | ||||
| <AM Tuner Section> | |||||
| Receiving frequency | 535 to 1,605 kHz | ||||
| Sensitivity | 20 μ V ± 3 dB (S/N 20 dB, 30% MOD, 1 MHz) | ||||
| Image ratio | 40dB(1MHz) | ||||
| <General> | |||||
| Power supply voltage | 100 VAC, 50Hz/60Hz | ||||
| Power consumption | 85 VA (max) | ||||
| External dimensions | Width 418x Height 130x Depth 324 mm | ||||
| Weight | 9.4kg | ||||