SANSUI SAX-2000
¥ 71,700 (released in May 1968)
Commentary
Top-of-the-line solid state FM/AM receiver with a tuner with built-in FET.
In the FM front-end section, a 4-series varicon dedicated to FM, RF first stage and RF second stage of FET, and a specially selected noiseless silicon transistor is used for the mixer and oscillator circuit.
In addition, the IF section of 5-stage amplification and 4-stage limiter provide a wide Takamasu, high stability, low noise and low distortion.
A two stage front-end AGC circuit and a one stage IF circuit enable stable reception even in strong electric fields.
Switching system is adopted for the multi-circuit.
The AM tuner section is a dedicated circuit instead of a common circuit for the FM tuner, and uses RF1-stage and 3-stage varicon.
This improves the AM noise characteristics and selectivity, such as the beat and whistle noise typical of AM radio waves.
In addition, it is equipped with a ferrite bar antenna, and the electric field strength can be switched by a long / short distance switch.
All silicon transistors are used for the FM and audio sections. Especially, noiseless silicon transistors are used for the head amplifier to improve distortion and S/N ratio at low output.
The power amplifier uses a complimentary service Darlington circuit SEPP-ITL-OTL system that uses a mesa silicon transistor as the power transistor.
In addition, a pure electronic power transistor protection circuit and a double-type protection circuit using a short-cut fuse are adopted.
The power supply uses a power transformer specially developed by SANSUI for transistor amplifiers.
In addition, a ham proof belt and short ring are attached so that the power supply ham does not come out.
The intermediate amplifier section uses NF-type tone control with low-noise silicon transistors.
Also, since it is a friction type double volume, each channel returns to a different sound quality.
.JPG)
Model Rating
| FM/AM Receiver | |
| <Audio section> | |
| Music Power (IHF) | 100W ± 1 dB (4 Ω) 85W ± 1 db (8 Ω) |
| Effective power | 36W/36W ± 1 db (4 Ω) 32W/32W ± 1 db (8 Ω) |
| Total harmonic distortion factor | 0.8% or Less (Rated Output) |
| Power Band Width (IHF) | 20 Hz ~ 40 kHz (8 Ω) |
| Frequency characteristic | AUX : 20 Hz to 30 kHz ± 1 dB Power Amplifier Part : 15 Hz ~ 40 kHz ± 1 dB |
| Hum and noise (IHF at rated output) | Phono : 70 dB or more AUX : 75 dB or more |
| Channel separation (at rated output) | Phono : 45 dB or more 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 |
| Input sensitivity (1 kHz input required for effective output) | Phono : 2.2 mV ± 3 dB Tape Head : 2 mv ± 3 db AUX, Tape Monitor (PIN/DIN) : 150 mv ± 3 db |
| Recorded output | Rec Out (PIN) : 150 mV ± 3 dB Rec Out (DIN) : 38 mv ± 3 db |
| Tone control | Bass : 50 Hz + 13 dB to -15dB Treble : 10 kHz ± 13 dB |
| Loudness control (Volume -30dB) | 50Hz:+8dB 10kHz:+3dB |
| Low filter | 50Hz:-10dB |
| High filter | 10kHz:-10dB |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Sensitivity | 1.4 μ V ± 3 dB (S/N 20 dB, 30% MOD) 1.8 μ V ± 3 dB (IHF) |
| Image ratio | 90 dB or More (84 MHz) |
| Signal-to-noise ratio | 65 dB or More (84 MHz, 30% MOD) |
| Total harmonic distortion factor | 0.8% or Less (Input 60 dB, 30% MOD, 84 MHz) |
| Selectivity | 50 dB or More (84 MHz) |
| Capture ratio | 2.5dB(IHF) |
| IF Rejection | 95 dB or More (84 MHz) |
| Spurious response | 90 dB or More (84 MHz) |
| Unwanted radiation | 34 dB or less |
| Channel separation | 35 dB or More (60 dB, 84 MHz) |
| <AM Tuner Section> | |
| Receiving frequency | 535 kHz to 1605 kHz |
| Sensitivity | 15 μ V ± 3 dB (IHF) |
| Image ratio | 50dB(1MHz) |
| IF Rejection | 100 dB or More (1 MHz) |
| Selectivity | 20 dB or More (1 MHz) |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 85 VA (max) |
| External dimensions | Width 415x Height 125x Depth 344 mm |
| Weight | 12kg |